201
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Prince E. Designing Biomimetic Strain-Stiffening into Synthetic Hydrogels. Biomacromolecules 2024. [PMID: 39356204 DOI: 10.1021/acs.biomac.4c00756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Biological tissues are mechanoresponsive; that is, their properties dynamically change in response to mechanical stimuli. For example, in response to shear or elongational strain, collagen, fibrin, actin, and other filamentous biomaterials undergo dramatic strain-stiffening. Above a critical strain, their stiffness increases over orders of magnitude. While it is widely accepted that the stiffness of biological tissues impacts cell phenotype and several diseases, the biological impact of strain-stiffening remains understudied. Synthetic hydrogels that mimic the mechanoresponsive nature of biological tissues could serve as an in vitro platform for these studies. This review highlights recent efforts to mimic the strain-stiffening behavior of biological materials in synthetic hydrogels. We discuss the design principles for imparting synthetic hydrogels with biomimetic strain-stiffening, critically compare designs of strain-stiffening hydrogels that have been reported thus far, and discuss their use as in vitro platforms to probe how strain-stiffening impacts cell behavior, diseases, and other biological processes.
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Affiliation(s)
- Elisabeth Prince
- Department of Chemical Engineering, University of Waterloo, 200 University Ave. West, N2L 3G1 Waterloo, ON, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave. West, N2L 3G1 Waterloo, ON, Canada
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202
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Wang H, Zhang Q, Chen S, Liu X, Liu J, He W, Liu X. Highly Conductive Supramolecular Salt Gel Electrolyte for Flexible Supercapacitors. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39356324 DOI: 10.1021/acsami.4c12666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Conductive gels have greatly facilitated the development of flexible energy storage devices, including supercapacitors, batteries, and triboelectric nanogenerators. However, it is challenging for gel electrolytes to tackle the trade-off issues between mechanical properties and conductivity. Herein, a strategy of all inorganic salt-driven supramolecular networks is presented to construct gel electrolytes with high conductivity and reliable mechanical performance for flexible supercapacitors. The salt gel is successfully fabricated by combining a salt supramolecular network constructed by NH4Mo7O24·4H2O and FeCl3·6H2O and a polymer network of poly(vinyl alcohol). The inorganic salt supramolecular network serves as a rigid self-supporting framework in the hydrogel system for improving the mechanical properties and providing abundant active sites for accelerating ion transport. Furthermore, the salt gel-enabled supercapacitors are equipped and exhibit a high specific capacitance (199.4 mF cm-2) and excellent energy density (27.69 μWh cm-2). Moreover, the flexible supercapacitors not only present remarkable cyclic stability after 3000 charging/discharging cycles but also exhibit good electrochemical stability even under severe deformation conditions. The strategy of salt-gel-driven flexible supercapacitors would provide fresh thinking for the development of advanced flexible energy storage fields.
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Affiliation(s)
- Hui Wang
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Qin Zhang
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Shuang Chen
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Xuming Liu
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Jinhua Liu
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Wenwen He
- Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Xin Liu
- Polymeric and Soft Materials Laboratory, School of Chemical Engineering and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
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203
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Fu X, Xian H, Xia C, Liu Y, Du S, Wang B, Xue P, Wang B, Kang Y. Polymer homologue-mediated formation of hydrogel microneedles for controllable transdermal drug delivery. Int J Pharm 2024; 666:124768. [PMID: 39366526 DOI: 10.1016/j.ijpharm.2024.124768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 09/16/2024] [Accepted: 09/25/2024] [Indexed: 10/06/2024]
Abstract
Poly(ethylene glycol) diacrylate (PEGDA) microneedles (MNs) are hydrogel-based devices that achieve controlled drug delivery kinetics by adjusting the crosslinking density. However, the biosafety of many crosslinking agents used to regulate crosslinking density is not ideal. To avoid crosslinking agents and simplify the preparation process, using two types of polymer homologues with different number-average molecular weights, we have successfully developed a series of PEGDA MNs with controllable crosslinking density (abbreviated as TP-X MNs). The research showed that the mechanical properties and drug release behavior of TP-X MNs could be tuned by simply controlling the weight proportion of two different PEGDA components in MNs. Ex vivo drug delivery experiments indicated that all TP-X MNs exhibited a sustained release profile, and their control range of 336-hour accumulative release rates was from 6.24% to 40.93%. Moreover, we prepared a novel dual-layer PEDGA MN, which can customize the drug loading and release rate in each layer of MN. This work demonstrates a new way to develop hydrogel MNs with adjustable crosslink density and broadens the applications of PEGDA MN in the biomedical field.
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Affiliation(s)
- Xinwei Fu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China
| | - Hong Xian
- West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chuanlan Xia
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China
| | - Yingqi Liu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China
| | - Shan Du
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China
| | - Bo Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China
| | - Peng Xue
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China.
| | - Bin Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China.
| | - Yuejun Kang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, School of Materials and Energy, Southwest University, Chongqing 400715, China; Yibin Academy of Southwest University, Yibin 644000, China.
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204
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Gwon G, Jung Y, Hong H, Cho H, Kim H, Kim KH, Kim NH. Real-Time Monitoring of Molecules in Aqueous Solution via a Surface-Functionalized Ag-Anodic Aluminum Oxide Surface-Enhanced Raman Scattering Platform. ACS APPLIED MATERIALS & INTERFACES 2024; 16:53123-53131. [PMID: 39313356 DOI: 10.1021/acsami.4c05885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/25/2024]
Abstract
Real-time monitoring of molecular species in aqueous solutions is crucial for diverse scientific applications, from biomedical diagnostics to environmental analysis. In this study, we investigate the selective detection and discrimination of specific molecules in aqueous solution samples using a Ag-coated anodized aluminum oxide (Ag-AAO) surface functionalized with thiol molecules. Our investigation harnesses the power of surface-enhanced Raman scattering (SERS) synergized with principal component analysis (PCA) to elucidate the distinctive signatures of aqueous dopamine and l-tyrosine molecules. By scrutinizing the Raman spectra of surface-treated molecules, we unveil nuanced variations driven by the unique functional groups of the thiol molecules and their dynamic interactions with the target molecules in solution. Notably, we observe different alterations in the SERS spectra of Ag-AAO surface-functionalized boronic acid molecules for detection of dopamine and l-tyrosine, even at a concentration as low as 10-8 M. Moreover, the spectral PCA elucidates the discrimination of dopamine and l-tyrosine within the aqueous environment attributed to the different molecular interactions near SERS-active hotspots. Our findings facilitate real-time monitoring of minute analytes with exceptional molecular selectivity, ushering in an era of precise chemical analysis in aqueous solutions.
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Affiliation(s)
- Geunyeol Gwon
- Department of Physics, Research Institute for Nanoscale Science and Technology, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Yujin Jung
- Center for Infectious Disease Vaccine and Diagnosis Innovation, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hyowon Hong
- Rare Disease Therapeutic Technology Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Heeyeong Cho
- Rare Disease Therapeutic Technology Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hyunwoo Kim
- Rare Disease Therapeutic Technology Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Kyoung-Ho Kim
- Department of Physics, Research Institute for Nanoscale Science and Technology, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Nam Hoon Kim
- Center for Infectious Disease Vaccine and Diagnosis Innovation, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
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205
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Naskar S, Minoia A, Duez Q, Izuagbe A, De Winter J, Blanksby SJ, Barner-Kowollik C, Cornil J, Gerbaux P. Polystyrene Chain Geometry Probed by Ion Mobility Mass Spectrometry and Molecular Dynamics Simulations. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:2408-2419. [PMID: 39279164 DOI: 10.1021/jasms.4c00231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/18/2024]
Abstract
Polystyrene (PS) is a thermoplastic polymer commonly used in various applications due to its bulk properties. Designing functional polystyrenes with well-defined structures for targeted applications is of significant interest due to the rigid and apolar nature of the polymer chain. Progress is hindered to date by the limitations of current analytical methods in defining the atomistic-level folding of the polymer chain. The integration of ion mobility spectrometry and molecular dynamics simulations is beneficial in addressing these challenges. However, data on gas-phase polystyrene ions are rarely reported in the literature. We herein investigate the gas phase structure of polystyrene ions with different end groups to establish how the nature and the rigidity of the monomer unit affect the charge stabilization. We find that, in contrast to polar polymers in which the charges are located deep in the ionic globules, the charges in the PS ions are rather located at the periphery of the polymer backbone, leading to singly and doubly charged PS ions adopting dense elliptic-shaped structures. Molecular dynamics (MD) simulations indicate that the folding of the PS rigid chain is controlled by phenyl ring interactions with the charge ultimately remaining excluded from the core of the globular ions, whereas the folding of polyether ions is initiated by the folding of the flexible polyether chain around the sodium ion that remains deeply enclosed in the core of the ions.
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Affiliation(s)
- Sarajit Naskar
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
- Center for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
| | - Andrea Minoia
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
| | - Quentin Duez
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
| | - Aidan Izuagbe
- Center for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
| | - Stephen J Blanksby
- Center for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Christopher Barner-Kowollik
- Center for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
| | - Jérôme Cornil
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons - UMONS, 23 Place du Parc, B-7000 Mons, Belgium
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206
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Gwiazda M, Lidster BJ, Waters C, Wongpanich J, Turner ML. Surfactant-Free Preparation of Conjugated Polymer Nanoparticles in Aqueous Dispersions Using Sulfate Functionalized Fluorene Monomers. J Am Chem Soc 2024; 146:27040-27046. [PMID: 39298286 DOI: 10.1021/jacs.4c08985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2024]
Abstract
Conjugated polymer nanoparticles (CPNs) can be synthesized by a Suzuki-Miyaura cross-coupling miniemulsion polymerization to give stable dispersions with a high concentration of uniform nanoparticles. However, large amounts of added surfactants are required to stabilize the miniemulsion and prevent the aggregation of the nanoparticles. Removal of the excess surfactant is challenging, and residual surfactant in thin films deposited from these dispersions can reduce the performance of optoelectronic devices. We report a novel approach to prepare stable dispersions with no added surfactant using a fluorene monomer, 2,7-dibromo-9,9-bis(undecanesulfate)-9H-fluorene, with alkyl side chains terminated by negatively charged sulfate groups. This functionality mimics the structure of one of the most commonly used surfactants, sodium dodecyl sulfate (SDS). This charged monomer effectively stabilizes the miniemulsion through electrostatic repulsion without the use of any additional surfactant in molar ratios ranging from 2.0 to 20.0 mol % of total monomer content for the preparation of poly(9,9-dioctylfluorene) (PFO) and poly(9,9-dioctylfluorene-alt-bithiophene) (PF8T2). Incorporation of 5.0 mol % of the amphiphilic monomer gave stable dispersions with a surface potential below -40 mV and, and polymers with molar mass (Mn) above 10 kg mol-1. This method should be generally applicable to the preparation of dispersions of polyfluorenes for application in organic electronic and optoelectronic devices without the requirement for time-consuming processes to remove residual surfactant.
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Affiliation(s)
- Marcin Gwiazda
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Benjamin J Lidster
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Charlotte Waters
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jaruphat Wongpanich
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Michael L Turner
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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207
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Obewhere OA, Acurio-Cerda K, Sutradhar S, Dike M, Keloth R, Dishari SK. Unravel-engineer-design: a three-pronged approach to advance ionomer performance at interfaces in proton exchange membrane fuel cells. Chem Commun (Camb) 2024. [PMID: 39356467 DOI: 10.1039/d4cc03221g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Proton exchange membrane fuel cells (PEMFCs), which use hydrogen as fuel, present an eco-friendly alternative to internal combustion engines (ICEs) for powering low-to-heavy-duty vehicles and various devices. Despite their promise, PEMFCs must meet strict cost, performance, and durability standards to reach their full potential. A key challenge lies in optimizing the electrode, where a thin ionomer layer is responsible for proton conduction and binding catalyst particles to the electrode. Enhancing ion transport within these sub-μm thick films is critical to improving the oxygen reduction reaction (ORR) at the cathodes of PEMFCs. For the past 15 years, our research has targeted this limitation through a comprehensive "Unravel - Engineer - Design" approach. We first unraveled the behavior of ionomers, gaining deeper insights into both the average and distributed proton conduction properties within sub-μm thick films and at interfaces that mimic catalyst binder layers. Next, we engineered ionomer-substrate interfaces to gain control over interfacial makeup and boost proton conductivity, essential for PEMFC efficiency. Finally, we designed novel nature-derived or nature-inspired, fluorine-free ionomers to tackle the ion transport limitations seen in state-of-the-art ionomers under thin-film confinement. Some of these ionomers even pave the way to address cost and sustainability challenges in PEMFC materials. This feature article highlights our contributions and their importance in advancing PEMFCs and other sustainable energy conversion and storage technologies.
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Affiliation(s)
| | - Karen Acurio-Cerda
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Nebraska, USA.
| | - Sourav Sutradhar
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Nebraska, USA.
| | - Moses Dike
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Nebraska, USA.
| | - Rajesh Keloth
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Nebraska, USA.
| | - Shudipto Konika Dishari
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Nebraska, USA.
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208
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Posey AE, Bremer A, Erkamp NA, Pant A, Knowles TPJ, Dai Y, Mittag T, Pappu RV. Biomolecular Condensates are Characterized by Interphase Electric Potentials. J Am Chem Soc 2024. [PMID: 39356108 DOI: 10.1021/jacs.4c08946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Biomolecular condensates form via processes that combine phase separation and reversible associations of multivalent macromolecules. Condensates can be two- or multiphase systems defined by coexisting dense and dilute phases. Here, we show that solution ions partition asymmetrically across coexisting phases defined by condensates formed by intrinsically disordered proteins or homopolymeric RNA molecules. Our findings were enabled by direct measurements of the activities of cations and anions within coexisting phases of protein and RNA condensates. Asymmetries in ion partitioning between coexisting phases vary with protein sequence, macromolecular composition, salt concentration, and ion type. The Donnan equilibrium set up by the asymmetrical partitioning of solution ions generates interphase electric potentials known as Donnan and Nernst potentials. Our measurements show that the interphase potentials of condensates are of the same order of magnitude as membrane potentials of membrane-bound organelles. Interphase potentials quantify the degree to which microenvironments of coexisting phases are different from one another. Importantly, and based on condensate-specific interphase electric potentials, we reason that condensates are akin to capacitors that store charge. Interphase potentials should lead to electric double layers at condensate interfaces, thereby explaining recent observations of condensate interfaces being electrochemically active.
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Affiliation(s)
- Ammon E Posey
- Department of Biomedical Engineering, Center for Biomolecular Condensates, James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130-4899, United States
| | - Anne Bremer
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38103, United States
| | - Nadia A Erkamp
- Department of Biomedical Engineering, Center for Biomolecular Condensates, James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130-4899, United States
- Yusuf Hamied Department of Chemistry, Centre for Misfolding Diseases, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Avnika Pant
- Department of Biomedical Engineering, Center for Biomolecular Condensates, James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130-4899, United States
| | - Tuomas P J Knowles
- Yusuf Hamied Department of Chemistry, Centre for Misfolding Diseases, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
- Cavendish Laboratory, Department of Physics, University of Cambridge, J. J. Thomson Ave, Cambridge CB3 0HE, U.K
| | - Yifan Dai
- Department of Biomedical Engineering, Center for Biomolecular Condensates, James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130-4899, United States
| | - Tanja Mittag
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38103, United States
| | - Rohit V Pappu
- Department of Biomedical Engineering, Center for Biomolecular Condensates, James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130-4899, United States
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209
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Bochenek M, Ciach MA, Smeets S, Beckers O, Vanderspikken J, Miasojedow B, Domżał B, Valkenborg D, Maes W, Gambin A. An Automated Analysis of Homocoupling Defects Using MALDI-MS and Open-Source Computer Software. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:2366-2375. [PMID: 39291650 DOI: 10.1021/jasms.4c00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Conjugated organic polymers have substantial potential for multiple applications but their properties are strongly influenced by structural defects such as homocoupling of monomer units and unexpected end-groups. Detecting and/or quantifying these defects requires complex experimental techniques, which hinder the optimization of synthesis protocols and fundamental studies on the influence of structural defects. Mass spectrometry offers a simple way to detect these defects but a manual analysis of many complex spectra is tedious and provides only approximate results. In this work, we develop a computational methodology for analyzing complex mass spectra of organic copolymers. Our method annotates spectra similarly to a human expert and provides quantitative information about the proportions of signal assigned to each ion. Our method is based on the open-source Masserstein algorithm, which we modify to handle large libraries of reference spectra required for annotating complex mass spectra of polymers. We develop a statistical methodology to analyze the quantitative annotations and compare the statistical distributions of structural defects in polymer chains between samples. We apply this methodology to analyze commercial and lab-made samples of a benchmark polymer and show that the samples differ both in the amount and in the types of structural defects.
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Affiliation(s)
- Maria Bochenek
- Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Banacha 2, Warsaw 02-097, Poland
| | - Michał Aleksander Ciach
- Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Banacha 2, Warsaw 02-097, Poland
- Data Science Institute, Hasselt University, Hasselt 3500, Belgium
- Department of Applied Biomedical Science, Faculty of Health Sciences, University of Malta, Msida, MSD 2080, Malta
| | - Sander Smeets
- Institute for Materials Research (IMO), Hasselt University, Agoralaan, Diepenbeek 3590, Belgium
- IMEC, Associated lab IMOMEC, Wetenschapspark 1, Diepenbeek,3590, Belgium
- Energyville, Thorpark, Genk 3600, Belgium
| | - Omar Beckers
- Institute for Materials Research (IMO), Hasselt University, Agoralaan, Diepenbeek 3590, Belgium
- IMEC, Associated lab IMOMEC, Wetenschapspark 1, Diepenbeek,3590, Belgium
- Energyville, Thorpark, Genk 3600, Belgium
| | - Jochen Vanderspikken
- Institute for Materials Research (IMO), Hasselt University, Agoralaan, Diepenbeek 3590, Belgium
- IMEC, Associated lab IMOMEC, Wetenschapspark 1, Diepenbeek,3590, Belgium
- Energyville, Thorpark, Genk 3600, Belgium
| | - Błażej Miasojedow
- Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Banacha 2, Warsaw 02-097, Poland
| | - Barbara Domżał
- Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Banacha 2, Warsaw 02-097, Poland
| | - Dirk Valkenborg
- Data Science Institute, Hasselt University, Hasselt 3500, Belgium
| | - Wouter Maes
- Institute for Materials Research (IMO), Hasselt University, Agoralaan, Diepenbeek 3590, Belgium
- IMEC, Associated lab IMOMEC, Wetenschapspark 1, Diepenbeek,3590, Belgium
- Energyville, Thorpark, Genk 3600, Belgium
| | - Anna Gambin
- Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Banacha 2, Warsaw 02-097, Poland
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210
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Saruwatari A, Kamiyama Y, Kawamura A, Miyata T, Tamate R, Ueki T. Straightforward preparation of a tough and stretchable ion gel. SOFT MATTER 2024; 20:7566-7572. [PMID: 39016625 DOI: 10.1039/d4sm00628c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Ion gels, polymer networks swollen by ionic liquids, are expected to be applied to wearable devices that are tolerant to repeated stretching. High strength and excellent stretchability was achieved due to the numerous physical cross-links with abundant polymer chain entanglements in addition to a small number of immobile chemical cross-links, even though the ion gel was prepared by a facile methodology.
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Affiliation(s)
- Aya Saruwatari
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
- Graduate School of Life Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yuji Kamiyama
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
- Graduate School of Life Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Akifumi Kawamura
- Department of Chemistry and Materials Engineering, Kansai University, 3-3-35, Yamate-cho, Suita, Osaka 564-8680, Japan
- Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35, Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Takashi Miyata
- Department of Chemistry and Materials Engineering, Kansai University, 3-3-35, Yamate-cho, Suita, Osaka 564-8680, Japan
- Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35, Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Ryota Tamate
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
| | - Takeshi Ueki
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
- Graduate School of Life Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
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211
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Sun M, Song R, Fang Y, Xu J, Yang Z, Zhang H. DNA-Based Complexes and Composites: A Review of Fabrication Methods, Properties, and Applications. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51899-51915. [PMID: 39314016 DOI: 10.1021/acsami.4c13357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/25/2024]
Abstract
Deoxyribonucleic acid (DNA), a macromolecule that stores genetic information in organisms, has recently been gradually developed into a building block for new materials due to its stable chemical structure and excellent biocompatibility. The efficient preparation and functional integration of various molecular complexes and composite materials based on nucleic acid skeletons have been successfully achieved. These versatile materials possess excellent physical and chemical properties inherent to certain inorganic or organic molecules but are endowed with specific physiological functions by nucleic acids, demonstrating unique advantages and potential applications in materials science, nanotechnology, and biomedical engineering in recent years. However, issues such as the production cost, biological stability, and potential immunogenicity of DNA have presented some unprecedented challenges to the application of these materials in the field. This review summarizes the cutting-edge manufacturing techniques and unique properties of DNA-based complexes and composites and discusses the trends, challenges, and opportunities for the future development of nucleic acid-based materials.
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Affiliation(s)
- Mengqiu Sun
- School of Physical Sciences, Great Bay University, Dongguan 523000, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Rui Song
- School of Physical Sciences, Great Bay University, Dongguan 523000, China
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518063, China
| | - Yangwu Fang
- School of Physical Sciences, Great Bay University, Dongguan 523000, China
| | - Jiuzhou Xu
- School of Life Sciences, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhaoqi Yang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Hao Zhang
- School of Physical Sciences, Great Bay University, Dongguan 523000, China
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518063, China
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212
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Meng M, Wu J, Guo X, Li T, Yue P, Tu Z, Wu R, Xing Y, Li F, Cao Q, Li K, Shang L, Chen J, Pang X, Li Y, Hao K, Tian H, Chen X. An Injectable Photothermal-Fusing Hydrogel: Achieving Temperature-Controllable Mild Photothermal Therapy to Reverse Chemotherapy-Induced Immune Tolerance. NANO LETTERS 2024. [PMID: 39356082 DOI: 10.1021/acs.nanolett.4c03766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Mild photothermal therapy (M-PTT) can induce immunogenic cell death (ICD) to reverse the immune tolerance caused by low-dose chemotherapy. However, it still needs convenient strategies to control temperature during M-PTT. In this work, the phase change material lauric acid (LA, melting point 43 °C) was introduced to construct nanoparticles loaded with deferoxamine mesylate (DFO) and cisplatin (CDDP), which were mixed into a supramolecular hydrogel formed by polyvinylpyrrolidone (PVP)/tannic acid (TA)/Fe3+ to obtain FeTP@DLD/DLC. When the temperature reached 43 °C under laser irradiation, DFO was released from melted LA and destroyed the interaction between Fe3+ and TA to cut off the temperature increase, achieving a "photothermal fusing effect". Meanwhile, CDDP was released for low-dose chemotherapy, while the resulting immune tolerance was reversed by M-PTT-induced ICD. Finally, through a single administration, FeTP@DLD/DLC-mediated M-PTT synergized with chemotherapy achieved a potent antitumor effect. This work provided a convenient solution for the revitalization of these traditional antitumor therapies.
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Affiliation(s)
- Meng Meng
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Jiayan Wu
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Xiaoya Guo
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Tong Li
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Penghan Yue
- School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Zhaoyuan Tu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Ruiying Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Yumeng Xing
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Fei Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Qiannan Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Keyang Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Ludan Shang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Jie Chen
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Xuan Pang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Yanhui Li
- School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Kai Hao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Huayu Tian
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361005, China
| | - Xuesi Chen
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
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213
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Yue X, Li F, Fu X, Wang Y, Yan N. Self-assembly of gold nanoparticles into ring-like hierarchical superstructures with tunable interparticle distance. SOFT MATTER 2024. [PMID: 39356348 DOI: 10.1039/d4sm00836g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Ring-like hierarchical superstructures have attracted increasing attention in recent years due to their structural symmetry and interesting properties. Here, we obtain well-defined ring-like superstructures with tunable interparticle distance from the self-assembly of polystyrene (PS)-tethered gold nanoparticles (AuNPs@PS). The results show that the interparticle distance between the adjacent AuNPs of the ring-like superstructures can be systematically tailored by adjusting the molecular weight of the tethered PS ligands. The thickness of the ring-like superstructures is proportional to the concentration of the inorganic NP building blocks. Interestingly, the formation of ring-like superstructures can be extended to a variety of inorganic NP building blocks with different diameters, shapes, tethered polymers. The PS-tethered gold nanorods (AuNRs) and gold nanocubes (AuNCs) can also self-assemble into ring-like superstructures. It is noteworthy that this strategy is universal to fabricate a variety of ring-like superstructures, which have potential applications in surface-enhanced Raman scattering, optoelectronics, and sensors.
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Affiliation(s)
- Xuan Yue
- College of Materials Science and Engineering, Technology Innovation Center of Modified Plastics of Hebei Province, Hebei University of Engineering, Handan 056038, China.
| | - Feibo Li
- College of Materials Science and Engineering, Technology Innovation Center of Modified Plastics of Hebei Province, Hebei University of Engineering, Handan 056038, China.
| | - Xiying Fu
- College of Materials Science and Engineering, Technology Innovation Center of Modified Plastics of Hebei Province, Hebei University of Engineering, Handan 056038, China.
| | - Yanming Wang
- College of Materials Science and Engineering, Technology Innovation Center of Modified Plastics of Hebei Province, Hebei University of Engineering, Handan 056038, China.
| | - Nan Yan
- College of Chemistry, Changchun Normal University, Changchun 130032, China.
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214
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Abdollahi M, Baharian A, Mohamadhoseini M, Hassanpour M, Makvandi P, Habibizadeh M, Jafari B, Nouri R, Mohamadnia Z, Nikfarjam N. Advances in ionic liquid-based antimicrobial wound healing platforms. J Mater Chem B 2024; 12:9478-9507. [PMID: 39206539 DOI: 10.1039/d4tb00841c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Wound infections, marked by the proliferation of microorganisms at surgical sites, necessitate the development of innovative wound dressings with potent bactericidal properties to curb microbial growth and prevent bacterial infiltration. This study explores the recent strides in utilizing ionic liquid-based polymers as highly promising antimicrobial agents for advanced wound healing applications. Specifically, cationic polymers containing quaternary ammonium, imidazolium, guanidinium, pyridinium, triazolium, or phosphonium groups have emerged as exceptionally effective antimicrobial compounds. Their mechanism of action involves disrupting bacterial membranes, thereby preventing the development of resistance and minimizing toxicity to mammalian cells. This comprehensive review not only elucidates the intricate dynamics of the skin's immune response and the various stages of wound healing but also delves into the synthesis methodologies of ionic liquid-based polymers. By spotlighting the practical applications of antimicrobial wound dressings, particularly those incorporating ionic liquid-based materials, this review aims to lay the groundwork for future research endeavors in this burgeoning field. Through a nuanced examination of these advancements, this article seeks to contribute to the ongoing progress in developing cutting-edge wound healing platforms that can effectively address the challenges posed by microbial infections in surgical wounds.
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Affiliation(s)
- Mahin Abdollahi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Aysan Baharian
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Masoumeh Mohamadhoseini
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Mahnaz Hassanpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Pooyan Makvandi
- School of Engineering, Institute for Bioengineering, The University of Edinburgh, Edinburgh EH9 3JL, UK
| | - Mina Habibizadeh
- Regenerative Medicine Research Center, Kermanshah University of Medical Sciences, Kermanshah 6715847141, Iran
| | - Bahman Jafari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Roya Nouri
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Zahra Mohamadnia
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
| | - Nasser Nikfarjam
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 451951159, Iran.
- Department of Chemical Engineering, College of Engineering and Computing, University of South Carolina, Columbia 29208, SC, USA
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215
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Meng L, Hu Y, Li W, Zhou Z, Cui S, Wang M, Chen Z, Wu Q. Molecular Chain Rearrangement-Induced In Situ Formation of Nanofibers for Improving the Strength and Toughness of Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2024; 16:53007-53021. [PMID: 39303004 DOI: 10.1021/acsami.4c13362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
Although poly(vinyl alcohol) (PVA) hydrogel has high elasticity and is suitable for cartilage tissue engineering, it is difficult to have both high strength and toughness. In this study, a simple and universal strategy is proposed to prepare strong and tough PVA hydrogels by in situ forming nanofibers on the original network structure induced by a molecular chain rearrangement. Quenching-tempering alteratively in ethanol and water several times is carried out to strengthen PVA hydrogels (PVA-Etn hydrogels) due to the advantages of noncovalent bonds in adjustability and reversibility. The results show that, after three quenching-tempering cycles, PVA-Et3 hydrogel with water content up to 79 wt % shows comprehensive improved mechanical properties. The compression modulus, tensile modulus, fracture strength, tensile strain, and tear energy of the PVA-Et3 hydrogel are 270, 250, 260, 130, and 180% of the initial PVA hydrogel, respectively. The improved mechanical properties of the PVA-Et3 hydrogel are attributed to the strong cross-linked PVA chains and hydrogen bond-reinforced nanofibers. This study not only provides a simple and efficient solution for the preparation of strong and tough polymer scaffolds in tissue engineering but also provides new insights for understanding the mechanism of improving the mechanical properties of polymer hydrogels by adjusting the molecular structure.
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Affiliation(s)
- Lihui Meng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Yanru Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Wenchao Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Zilin Zhou
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Shuojie Cui
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Meng Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Zebin Chen
- Center of Hepato-Pancreato-Biliary Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China
| | - Qingzhi Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
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216
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Saraiva MA. Temperature-Driven Stopped-Flow Experiments for Investigating the Initial Aggregation of the α-Synuclein Amyloid Protein, Focusing on Active and Inactive Phases. J Fluoresc 2024:10.1007/s10895-024-03971-8. [PMID: 39354189 DOI: 10.1007/s10895-024-03971-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Accepted: 09/26/2024] [Indexed: 10/03/2024]
Abstract
The primary objective of this research is to further examine the events occurring during the active or burst phase by focusing on the aggregation of the Syn amyloid protein. Regarding this aspect, it was initially conducted rapid temperature variations using stopped-flow spectrometry and tyrosyl group fluorescence emission detection, within the initial 500 milliseconds in buffered Syn solutions at pH 7, exploring various temperature ranges to investigate protein aggregation. The results obtained were contrasted with results obtained for the Nα-acetyl-L-tyrosinamide (NAYA) parent compound in the same conditions. The utilization of the NAYA compound is suitable as it mimics the peptide bonds in proteins and contains a tyrosyl group resembling the four tyrosyl groups found in the Syn protein structure (the protein has no tryptophan residues). Furthermore, the NAYA compound adopts an intramolecularly hydrogen-bonded structure even in an aqueous solution, similar to the interactions seen in the hydrophilic face of β-sheets. Additionally, the Syn protein system can exhibit the presence of β-sheets as a result of the existence of very low abundant Syn amyloid precursor forms or nuclei during the initial stages of the protein aggregation. Thus, a relationship is present between the molecular processes in the NAYA and Syn protein systems, making the NAYA's application crucial in this research. Moreover, to aid in understanding the results, it was also compared the events during the quiescent or inactive phase (30-500 milliseconds) with those in the burst phase (up to 10 milliseconds) using stopped-flow spectrometry conditions. Steady-state measurements were beneficial in comprehending the occurrences in both the quiescent and burst phases examined. Although protein aggregation and disaggregation were observed during the quiescent phase, determining these processes in the burst phase was more challenging. In the latter case, the aggregation of the Syn protein is actually initiated by the interaction of the intrinsically disordered Syn monomers. In the quiescent phase, first-order rate constants were measured and analysis showed that Syn protein aggregation and disaggregation occur simultaneously. At lower temperatures, early protein disaggregation outweighs protein aggregation whereas at higher temperatures protein disaggregation and aggregation are rather similar. It is also need to highlight that the burst phase, while distinct from the quiescent phase, can be considered as a possible structural phase for obtaining details about the aggregation of this specific disordered protein in solution on a very short timescale.
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Affiliation(s)
- Marco A Saraiva
- Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, University of Lisbon, Campus Alameda, Av. Rovisco Pais, Lisbon, 1049-001, Portugal.
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, Oeiras, 2780-157, Portugal.
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217
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Wang Z, Huang L, Gao J, Luo H, Dong X, Wang C, Song Y. Leaf Vein-Inspired Superhydrophilic Microchannels for Sustainable Fog Collection. ACS APPLIED MATERIALS & INTERFACES 2024; 16:53252-53260. [PMID: 39298517 DOI: 10.1021/acsami.4c11883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2024]
Abstract
Fog collection is a promising solution for mitigating the urgent water shortage around the world. Despite the delicate design of various bionic fog harvesting surfaces with prowess to enable fast fog capture and programmed water transport, achieving sustainable and efficient fog collection by regulating the macroscale surface refreshment efficacy remains rarely concerned yet is effective. Here, we proposed a bioinspired structural design to achieve significant improvement on the surface refreshment efficacy to 46.47%, nearly 5 times larger than that of conventional design. Specifically, we constructed superhydrophilic vein-like microchannels on a superhydrophobic brass surface by using laser texture technology and hydrothermal treatment. Our microchannel design acts as a "highway" for synergically transporting and converging the collected fog droplets, as well as rapidly refreshing large surface area for the subsequent fog collection, reminiscent of the leaf veins responsible for the persistent mass transport between plant tissues. The practical implementation also convinced our design of a maximum water collection efficiency of up to 506.67 mg cm-2 h-1 and a long-term performance stability within a 10 h test. Our design is generic to most of the fog harvesting materials, showing great application potential for efficient atmospheric fog collection.
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Affiliation(s)
- Zhiyong Wang
- Research Center for Forestry Equipment of Hunan Province, College of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, 498 South Shaoshan Street, Changsha 410004, P. R. China
| | - Longhui Huang
- Research Center for Forestry Equipment of Hunan Province, College of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, 498 South Shaoshan Street, Changsha 410004, P. R. China
| | - Jinghui Gao
- Research Center for Forestry Equipment of Hunan Province, College of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, 498 South Shaoshan Street, Changsha 410004, P. R. China
| | - Hong Luo
- Research Center for Forestry Equipment of Hunan Province, College of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, 498 South Shaoshan Street, Changsha 410004, P. R. China
| | - Xinran Dong
- Research Center for Forestry Equipment of Hunan Province, College of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, 498 South Shaoshan Street, Changsha 410004, P. R. China
| | - Cong Wang
- State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, 932 South Lushan Street, Changsha 410083, P. R. China
| | - Yuxin Song
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 100872, P. R. China
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218
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Sun Y, Wang K, Huang X, Wei S, Contreras E, Jain PK, Campos LM, Kulik HJ, Moore JS. Caged AIEgens: Multicolor and White Emission Triggered by Mechanical Activation. J Am Chem Soc 2024; 146:27117-27126. [PMID: 39306733 DOI: 10.1021/jacs.4c09926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Aggregation-induced emission luminogens (AIEgens) that respond to mechanical force are increasingly used as force probes, memory devices, and advanced security systems. Most of the known mechanisms to modulate mechanoresponsive AIEgens have been based on changes in aggregation states, involving only physical alterations. Instances that employ covalent bond cleavage are still rare. We have developed a novel mechanochemical uncaging strategy to unveil AIEgens with diverse emission characteristics using engineered norborn-2-en-7-one (NEO) mechanophores. These NEO mechanophores were covalently integrated into polymer molecules and activated in both the solution and solid states. This activation resulted in highly tunable fluorescence upon immobilization through solidification or aggregation, producing blue, green, yellow, and orange-red emissions. By designing the caged and uncaged forms as donor-acceptor pairs for Förster resonance energy transfer (FRET), we achieved multicolor mechanofluorescence, effectively broadening the color spectrum to include white emission. Additionally, we computationally explored the electronic structures of activated NEOs, providing insights into the observed regiochemical effects of the substituents. This understanding, together with the novel luminogenic characteristics of the caged and activated species, provides a highly tunable reporter that traces progress with continuous color evolution. This advancement paves the way for future applications of mechanoresponsive materials in areas like damage detection and bioimaging.
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Affiliation(s)
- Yunyan Sun
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Kecheng Wang
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Xiao Huang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Shixuan Wei
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Enrique Contreras
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Prashant K Jain
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Luis M Campos
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Heather J Kulik
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jeffrey S Moore
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States
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219
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Sang J, Orimoto Y, Aoki Y. Photodegradation Pathways of Aliphatic Polyamide through Conical Intersection between Ground and Excited States. J Phys Chem A 2024. [PMID: 39358900 DOI: 10.1021/acs.jpca.4c03615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2024]
Abstract
Time-dependent density functional theory studies were performed to investigate the photochemistry properties of the widely used aliphatic polyamide (APA), alias nylon, under ultraviolet radiation with N-ethylacetamide (NEA) being the model molecule. The characteristics of the transition molecular orbitals for the low-order excited states (ESs) of NEA were clarified, and the ES geometries related to the transition worthy of study were optimized. Our research proved that there is a conical intersection between the ground and excited states featured by the transition from the lone pair orbital to the σ antibonding orbital on the C-N bond within the peptide group or the N-C bond adjacent to the carbonyl group, and the C-N or N-C bond has the probability to be disrupted after internal conversion. These original quantum chemistry discoveries depict the C-N and N-C bond cleavage scheme that initiates the primary and secondary paths in the scission processes of the APA chain, respectively, which is helpful for giving new insight into the overall photodissociation mechanism of APA and designing advanced polyamide-based synthetic fibers.
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Affiliation(s)
- Jingcheng Sang
- Department of Interdisciplinary Engineering Sciences, Chemistry and Materials Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Park, Fukuoka 816-8580, Japan
| | - Yuuichi Orimoto
- Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Park, Fukuoka 816-8580, Japan
| | - Yuriko Aoki
- Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga Park, Fukuoka 816-8580, Japan
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220
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Fang B, Peng Z, Chen B, Rao J. Hemp Protein Isolate-Based Natural Thermal-Reversible Hydrogel as a Novel Wound Dressing Material. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51916-51931. [PMID: 39302428 DOI: 10.1021/acsami.4c05854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
Hydrogels, due to their excellent microstructure and mechanical strength, have become a novel biomaterial in wound dressing. However, plant proteins have never been considered because of their poor original gelling performances and insufficient rheological properties. Here, we reported the fabrication of a plant protein-based thermal-reversible gel using a reverse micelle-extracted hemp protein isolate (HPI). A systematic study was conducted to fully reveal their microstructure, rheological properties, and anti-inflammatory effect to lay a foundation for this newly developed plant protein hydrogel as a potential natural wound dressing. By modulating protein concentration (4% HPI) and temperature (85 °C), a thermal-reversible HPI gel appeared as a filament structure with the major molecular driving force of hydrophobic interactions and hydrogen bonds. By characterizing the rheological properties, lower gel strength and wider linear viscoelastic regime were determined in the thermal-reversible HPI gel compared with a thermal-irreversible HPI gel. Besides, large amplitude oscillatory shear data identified the thermal-reversible gel as a soft gel which demonstrated intracycle strain stiffening and shear thinning behavior. Moreover, the thermal-reversible HPI gel is nontoxic and has benefits in neutrophil growth with injectability and perfect wound coverage. This study opens a novel means to form a natural thermal-reversible hydrogel that can be a new material source for wound dressing.
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Affiliation(s)
- Baochen Fang
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Zhicheng Peng
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota 58108, United States
- Department of Cancer Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Bingcan Chen
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Jiajia Rao
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota 58108, United States
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221
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Li J, Hao Y, Wang H, Zhang M, He J, Ni P. Advanced Biomaterials Derived from Functional Polyphosphoesters: Synthesis, Properties, and Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51876-51898. [PMID: 39311719 DOI: 10.1021/acsami.4c11899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2024]
Abstract
Polyphosphoesters (PPEs) represent an innovative class of biodegradable polymers, with the phosphate ester serving as the core repeating unit of their polymeric backbone. Recently, biomaterials derived from functionalized PPEs have garnered significant interest in biomedical applications because of their commendable biocompatibility, biodegradability, and the capacity for functional modification. This review commences with a brief overview of synthesis methodologies and the distinctive properties of PPEs, including thermoresponsiveness, degradability, stealth effect, and biocompatibility. Subsequently, the review delves into the latest applications of PPEs-based nanocarriers for drug or gene delivery and PPEs-based polymeric prodrugs and scaffolds in the biomedical field, presenting several illustrative examples for each application. By encapsulating the advancements of recent years, this review aims to offer an enhanced understanding and serve as a reference for the synthesis and biomedical applications of functional PPEs.
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Affiliation(s)
- Jintao Li
- College of Chemistry, Chemical Engineering and Materials Science, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Soochow University, Suzhou, Jiangsu 215123, China
| | - Ying Hao
- CAS Key Laboratory of Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China
| | - Hairong Wang
- Children's Hospital of Soochow University, Pediatric Research Institute of Soochow University, Suzhou, Jiangsu 215123, China
| | - Mingzu Zhang
- College of Chemistry, Chemical Engineering and Materials Science, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Soochow University, Suzhou, Jiangsu 215123, China
| | - Jinlin He
- College of Chemistry, Chemical Engineering and Materials Science, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Soochow University, Suzhou, Jiangsu 215123, China
| | - Peihong Ni
- College of Chemistry, Chemical Engineering and Materials Science, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Soochow University, Suzhou, Jiangsu 215123, China
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222
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Chuang WT, Chen SP, Tsai YB, Sun YS, Lin JM, Chen CY, Tsai YW, Chou CM, Hung YC, Chen TW, Wang WE, Huang CC, Hong PD, Jeng US, Chiang YW. Spontaneous Photonic Jammed Packing of Core-Shell Colloids in Conductive Aqueous Inks for Non-Iridescent Structural Coloration. ACS APPLIED MATERIALS & INTERFACES 2024; 16:52856-52866. [PMID: 39174350 DOI: 10.1021/acsami.4c09049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Integrating structural colors and conductivity into aqueous inks has the potential to revolutionize wearable electronics, providing flexibility, sustainability, and artistic appeal to electronic components. This study aims to introduce bioinspired color engineering to conductive aqueous inks. Our self-assembly approach involves mixing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) with sulfonic acid-modified polystyrene (sPS) colloids to generate non-iridescent structural colors in the inks. This spontaneous structural coloration occurs because PEDOT:PSS and sPS colloids can self-assemble into core-shell structures and reversibly cluster into photonic aggregates of maximally random jammed packing within the aqueous environment, as demonstrated by small-angle X-ray scattering. Dissipative particle dynamics simulation confirms that the self-assembly aggregation of PEDOT:PSS chains and sPS colloids can be manipulated by the polymer-colloid interactions. Utilizing the finite-difference time-domain method, we demonstrate that the photonic aggregates of the core-shell colloids achieve close to maximum jammed packing, making them suitable for producing vivid structural colors. These versatile conductive inks offer adjustable color saturation and conductivity, with conductivity levels reaching 36 S cm-1 through the addition of polyethylene glycol oligomer, while enhanced water resistance and mechanical stability are achieved by doping with a cross-linker, poly(ethylene glycol) diglycidyl ether. With these unique features, the inks can create flexible, patterned circuits through processes like coating, writing, and dyeing on large areas, providing eco-friendly, visually appealing colors for customizable, stylish, comfortable, and wearable electronic devices.
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Affiliation(s)
- Wei-Tsung Chuang
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
| | - Shu-Ping Chen
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
| | - Yu-Bo Tsai
- Department of Chemical and Materials Engineering, National Central University, Taoyuan 32001, Taiwan
| | - Ya-Sen Sun
- Department of Chemical Engineering, National Cheng Kung University, Tainan City 70101, Taiwan
| | - Jhih-Min Lin
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
| | - Chun-Yu Chen
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
| | - Yi-Wei Tsai
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
| | - Che-Min Chou
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
| | - Yu-Chueh Hung
- Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tse-Wei Chen
- Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Wei-En Wang
- Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chao-Chin Huang
- Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Po-Da Hong
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
| | - U-Ser Jeng
- National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yeo-Wan Chiang
- Department of Materials and Optoelectronic Science and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
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223
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Zhao M, Cho SH, Wu X, Mao J, Vogt BD, Zacharia NS. Covalently crosslinked coacervates: immobilization and stabilization of proteins with enhanced enzymatic activity. SOFT MATTER 2024; 20:7623-7633. [PMID: 39291470 DOI: 10.1039/d4sm00765d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Coacervates represent models for membrane-free protocells and thus provide a simple route to synthetic cellular-like systems that provide selective encapsulation of solutes. Here, we demonstrate a simple and versatile post-coacervation crosslink method using the thiol-ene click reaction in aqueous media to prepare covalently crosslinked coacervates. The crosslinking of the coacervate enables stability at extreme pH where the uncrosslinked coacervate fully disassembles. The crosslinking also enhances the hydrophobicity within the coacervate environment to increase the encapsulation efficiency of bovine serum albumin (BSA), as compared to the uncrosslinked coacervate. Additionally, the crosslinked coacervate increases the stabilization of BSA at low pH. These crosslinked coacervates can act as carriers for enzymes. The enzymatic activity of alkaline phosphatase (ALP) is enhanced within the crosslinked coacervate compared to the ALP in aqueous solution. The post-coacervation crosslink approach allows the utilization of coacervates for encapsulation of biologicals under conditions where the coacervate would generally disassemble. We demonstrate that these crosslinked coacervates enable the protection of encapsulated protein against denaturation at extreme pH and enhance the enzymatic activity with encapsulation. This click approach to stabilization of coacervates should be broadly applicable to other systems for a variety of biologics and environmentally sensitive molecules.
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Affiliation(s)
- Mengmeng Zhao
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
| | - Szu-Hao Cho
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
| | - Xinchi Wu
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
| | - Jingyi Mao
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
| | - Bryan D Vogt
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Nicole S Zacharia
- Department of Polymer Engineering, University of Akron, Akron OH 44325, USA
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224
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Gao L, Zhang J, Wang L, Zhang D, Li F, Shen H, Hu BL, Li RW. Highly elastic relaxor ferroelectrics for wearable energy storage. MATERIALS HORIZONS 2024. [PMID: 39354842 DOI: 10.1039/d4mh00998c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Polymer-based relaxor ferroelectrics with high dielectric constant are pivotal in cutting-edge electronic devices, power systems, and miniaturized pulsed electronics. The surge in flexible electronics technology has intensified the demand for elastic ferroelectric materials that exhibit excellent electrical properties and mechanical resilience, particularly for wearable devices and flexible displays. However, as an indispensable component, intrinsic elastomers featuring high dielectric constant and outstanding resilience specifically tailored for elastic energy storage remain undeveloped. Elastification of relaxor ferroelectric materials presents a promising strategy to obtain high-dielectric elastomers. In this study, we present a strain-insensitive, high elastic relaxor ferroelectric material prepared via peroxide crosslinking of a poly(vinylidene fluoride) (PVDF)-based copolymer at low temperature, which exhibits an intrinsic high dielectric constant (∼20 at 100 Hz) alongside remarkable thermal, chemical, and mechanical stability. This relaxor ferroelectric elastomer maintains a stable energy density (>8 J cm-3) and energy storage efficiency (>75%) under strains ranging from 0 to 80%. This strain-insensitive, high elastic relaxor ferroelectric elastomer holds significant potential for flexible electronic applications, offering superior performance in soft robotics, smart clothing, smart textiles, and electronic skin.
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Affiliation(s)
- Liang Gao
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Jiaqi Zhang
- Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, P. R. China
- School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, P. R. China
| | - Linping Wang
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Dongyang Zhang
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Fangzhou Li
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Haoyu Shen
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Ben-Lin Hu
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
| | - Run-Wei Li
- CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 West Zhongguan Road, Zhenhai District, Ningbo, P. R. China, 315201.
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225
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Bin FC, Zheng ML. Perspective on Water-Soluble Two-Photon Initiator for Two-Photon Polymerization. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51807-51815. [PMID: 39291561 DOI: 10.1021/acsami.4c08956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Two-photon polymerization (TPP) as an unparalleled technology empowers the rapid prototyping of customized three-dimensional (3D) micro/nanostructures, garnering noticeable interest in tissue engineering, drug delivery, and regenerative medicine. These applications have a high requirement on the biocompatibility and integrity of 3D structures. Therefore, it is important to develop two-photon initiator with good water-solubility, initiation efficiency, and biocompatibility. Here, we share our insights into the development of a water-soluble two-photon initiator (WTPI) and applications from the material and manufacturing perspective. We highlight the nonlinear optical properties and the synthesis of WTPI through three pathways. Then we further demonstrate the applications of the TPP technique in the aqueous phase in the fields of tissue engineering, 4D printing, and ceramic manufacturing. Finally, a general conclusion and outlook are provided for the future development and application of WTPI.
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Affiliation(s)
- Fan-Chun Bin
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Future Technologies, University of Chinese Academy of Sciences, Yanqihu Campus, Beijing 101407, P. R. China
| | - Mei-Ling Zheng
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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226
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Tkachenko IM, Kurioz YI, Kravchuk RM, Kobzar YL, Litoshenko DV, Glushchenko AV, Shevchenko VV, Nazarenko VG. Photoinduced Birefringence and Liquid Crystal Orientation on Polymers with Different Azobenzene Content in the Main Chain. ACS APPLIED MATERIALS & INTERFACES 2024; 16:52945-52957. [PMID: 39287937 DOI: 10.1021/acsami.4c11876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
In this paper, we give an overview of novel main-chain azobenzene-based fluorinated poly(arylene ether)s with different content of azo groups, aiming at providing a better understanding of the link between a number of N═N bonds and the macroscopic response of the material. We discuss chemical synthesis and molecular structure and report on a comprehensive analysis of the polymer properties, thermal behavior, and mechanical strength. We show that a higher content of azobenzene moieties reduces the mechanical strength of the polymer materials. On the other hand, polymers with a higher content of azobenzene demonstrate higher values of induced birefringence due to a larger number of azobenzene in the trans form. The photoisomerization constants of all polymers fall within a very close range. The minor variations are attributed to the number of azobenzene groups in the polymer composition and the conformational arrangements of the polymer chain packing. The developed light-sensitive polymers were employed for dynamic control and manipulation of the liquid crystal orientation by polarization of the incident light. After the double irradiation of the substrates using appropriate photomasks, we made patterned cells that consist of domains with different high-resolution liquid crystal director orientations.
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Affiliation(s)
- Ihor M Tkachenko
- Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Kharkivske Shosse 48, Kyiv 02160, Ukraine
| | - Yuriy I Kurioz
- Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauky 46, Kyiv 03028, Ukraine
| | - Ruslan M Kravchuk
- Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauky 46, Kyiv 03028, Ukraine
- Institute of Physical Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Yaroslav L Kobzar
- UMR 6270, CNRS, Polymerès Biopolymères Surfaces (PBS), Univ Rouen Normandie, INSA Rouen Normandie, Rouen 76000, France
| | - Dmytro V Litoshenko
- Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauky 46, Kyiv 03028, Ukraine
| | - Anatoliy V Glushchenko
- Department of Physics, University of Colorado at Colorado Springs, 1420 Austin Bluffs Parkway, Colorado Springs, Colorado 80918, United States
| | - Valery V Shevchenko
- Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Kharkivske Shosse 48, Kyiv 02160, Ukraine
| | - Vassili G Nazarenko
- Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauky 46, Kyiv 03028, Ukraine
- Institute of Physical Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
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227
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Zhang X, Feng X, Guo W, Zhang C, Zhang X. Chemically recyclable polyvinyl chloride-like plastics. Nat Commun 2024; 15:8536. [PMID: 39358344 PMCID: PMC11447067 DOI: 10.1038/s41467-024-52852-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2024] [Accepted: 09/23/2024] [Indexed: 10/04/2024] Open
Abstract
Polyvinyl chloride (PVC) is the world's third-most widely manufactured thermoplastic, but has the lowest recycling rate. The development of PVC-like plastics that can be depolymerized back to monomer contributes to a circular plastic economy, but has not been accessed. Here, we develop a series of chemically recyclable plastics from the reversible copolymerization of cyclic anhydride with chloral. The copolymerization is highly efficient through the anionic or cationic mechanism under mild conditions, yielding polyesters with tunable structure and properties from multiple commercial monomers. Notably, these polyesters manifest mechanical properties comparable to PVC and polystyrene. Meanwhile, such polyesters are flame-retardant like PVC due to high chloride content. Of significance, these polyesters can be depolymerized back to starting monomers at high temperatures owing to the reversibility of the copolymerization, leading to a circular economy. Overall, the readily available monomers, simple synthesis, advantageous performance, and practical recyclability make the polymers promising for applications.
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Affiliation(s)
- Xun Zhang
- State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Ximin Feng
- State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Wenqi Guo
- State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Chengjian Zhang
- State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
| | - Xinghong Zhang
- State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
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228
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Liu J, Liu X, Chen X, Zhou J, Xue J, Zhao H, Wang C, Liu F, Li L. In Situ Forming Asymmetric Gel Polymer Electrolyte Enhances the Performance of High-Voltage Lithium Metal Batteries. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39356794 DOI: 10.1021/acsami.4c11615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2024]
Abstract
With the rapid evolution of electric vehicle technology, concerns regarding range anxiety and safety have become increasingly pronounced. Battery systems with high specific energy and enhanced security, featuring ternary cathodes paired with lithium (Li) metal anodes, are poised to emerge as next-generation electrochemical devices. However, the asymmetric configuration of the battery structure, characterized by the robust oxidative behavior of the ternary cathodes juxtaposed with the vigorous reductive activity of the Li metal anodes, imposes elevated requisites for the electrolytes. Herein, a well-designed gel polymer electrolyte with asymmetric structure was successfully prepared based on the Ritter reaction of cyanoethyl poly(vinyl alcohol) (PVA-CN) and cationic ring-opening polymerization of s-Trioxane. With the aid of the sieving effect of separator, the in situ asymmetric gel polymer electrolyte has good compatibility with both the high-voltage cathodes and Li anodes. The amide groups generated by PVA-CN after the Ritter reaction and additional cyano groups can tolerate high voltages up to 5.1 V, matching with ternary cathodes without any challenges. The functional amide and cyano groups participate in the formation of the cathode electrolyte interface and stabilize the cathode structure. Meanwhile, the in situ formed ether-based polyformaldehyde electrolyte is beneficial for promoting uniform Li deposition on anode surfaces. Li-Li symmetric cells demonstrate sustained stability over 2000 h of cycling at a current density of 1 mA cm-2 for 1 mAh cm-2. Furthermore, the capacity retention rate of Li(Ni0.6Mn0.2Co0.2)O2-Li cells with 0.5 C cycling after 300 cycles is 92.2%, demonstrating excellent cycle stability. The electrolyte preparation strategy provides a strategy for the progress of high-performance electrolytes and promotes the rapid development of high-energy-density Li metal batteries.
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Affiliation(s)
- Jingjing Liu
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Xiao Liu
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Xiaowen Chen
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jianjun Zhou
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jinxin Xue
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Huijuan Zhao
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Chen Wang
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Fengquan Liu
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Lin Li
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
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229
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Bodiuzzaman M, Murugesan K, Yuan P, Maity B, Sagadevan A, Malenahalli H N, Wang S, Maity P, Alotaibi MF, Jiang DE, Abulikemu M, Mohammed OF, Cavallo L, Rueping M, Bakr OM. Modulating Decarboxylative Oxidation Photocatalysis by Ligand Engineering of Atomically Precise Copper Nanoclusters. J Am Chem Soc 2024; 146:26994-27005. [PMID: 39297671 DOI: 10.1021/jacs.4c08688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Copper nanoclusters (Cu NCs) characterized by their well-defined electronic and optical properties are an ideal platform for organic photocatalysis and exploring atomic-level behaviors. However, their potential as greener, efficient catalysts for challenging reactions like decarboxylative oxygenation under mild conditions remains unexplored. Herein, we present Cu13(Nap)3(PPh3)7H10 (hereafter Cu13Nap), protected by 1-naphthalene thiolate (Nap), which performs well in decarboxylative oxidation (90% yield) under photochemical conditions. In comparison, the isostructural Cu13(DCBT)3(PPh3)7H10 (hereafter Cu13DCBT), stabilized by 2,4-dichlorobenzenethiolate (DCBT), yields only 28%, and other previously reported Cu NCs (Cu28, Cu29, Cu45, Cu57, and Cu61) yield in the range of 6-18%. The introduction of naphthalene thiolate to the surface of Cu13 NCs influences their electronic structure and charge transfer in the ligand shell, enhancing visible light absorption and catalytic performance. Density functional theory (DFT) and experimental evidence suggest that the reaction proceeds primarily through an energy transfer mechanism. The energy transfer pathway is uncommon in the context of previous reports for decarboxylative oxidation reactions. Our findings suggest that strategically manipulating ligands holds significant potential for creating composite active sites on atomically precise copper NCs, resulting in enhanced catalytic efficacy and selectivity across various challenging reactions.
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Affiliation(s)
- Mohammad Bodiuzzaman
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Kathiravan Murugesan
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Peng Yuan
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Bholanath Maity
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Arunachalam Sagadevan
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Naveen Malenahalli H
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Song Wang
- Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Partha Maity
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Mohammed F Alotaibi
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - De-En Jiang
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235-1604, United States
| | - Mutalifu Abulikemu
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Omar F Mohammed
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Osman M Bakr
- Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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230
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Shi J, Zhou J, Liu L, Miao C. Molecular dynamics simulations of single polyethylene chain folding during fast quenching using all-atom and united-atom models. Phys Chem Chem Phys 2024; 26:24995-25004. [PMID: 39300936 DOI: 10.1039/d4cp02746a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
Molecular dynamics simulations have been employed to investigate the folding behavior of a single linear polyethylene (PE) chain containing 1000 backbone carbon atoms under fast quenching based on all-atom and united-atom models. The single-chain folding characteristics were studied in detail for six different force fields by analyzing the evolution of chain conformations, folded structure characterisation, free energy and crystallisation. The results show that the all-trans chain undergoes a similar two-stage chain collapse mechanism during isothermal relaxation at T = 500 K, transitioning from local collapse to global collapse into a molten globule state under different force fields. During fast quenching at 100 K ns-1, the molten globule of all-atom model transitions into a folded, significantly anisotropic ordered structure under AMBER-AA or OPLS-AA force fields, while that of the united-atom model remains unchanged in its globular structure. The chain crystallization evolution indicates that the single chain folds into ordered lamellar structures with higher crystallinity under AMBER-AA and OPLS-AA force fields. In contrast, under the other four force fields, the single chain remains in a stable amorphous state.
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Affiliation(s)
- Jingfu Shi
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Jianqiu Zhou
- Institute of Basic Medical Sciences, Harbin Medical University, Harbin, 150086, P. R. China.
| | - Lei Liu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Changqing Miao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, P. R. China.
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231
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Siavoshani AY, Fan Z, Yang M, Liu S, Wang MC, Liu J, Xu W, Wang J, Lin S, Wang SQ. How do stretch rate, temperature, and solvent exchange affect elastic network rupture? SOFT MATTER 2024; 20:7657-7667. [PMID: 39291705 DOI: 10.1039/d4sm00794h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
In this study, we investigate three different polymeric networks in terms of their tensile strength as a function of stretching rate, or temperature, or medium viscosity. Both an acrylate-based elastomer and a crosslinked poly(methyl acrylate) are stronger, more stretchable, and tougher at high rates. They are also much stronger at lower temperatures. Such phenomena systematically suggest that the kinetics of bond dissociation in backbones of those load-bearing strands dictate the rate and temperature dependencies. We apply Eyring's activation idea for chain scission to rationalize the influence of rate and temperature on rupture for both elastomers and hydrogels where hydrogels become much more stretchable and stronger when water is replaced by glycerol.
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Affiliation(s)
- Asal Y Siavoshani
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Zehao Fan
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Muxuan Yang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Shan Liu
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Ming-Chi Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Jiabin Liu
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI, USA
| | - Weinan Xu
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
| | - Shaoting Lin
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI, USA
| | - Shi-Qing Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA.
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232
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Zhu J, Luo D, Wang Q, Tong S, Wang Z, Yan J. Room-temperature synthesis of a fluorine-functionalized nanoporous organic polymer for efficient SF 6 separation. Chem Commun (Camb) 2024. [PMID: 39356212 DOI: 10.1039/d4cc03782k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Addressing the environmental impact of SF6, we synthesized a fluorine-functionalized triphenylamine-based nanoporous organic polymer, ANOP-8, at room temperature using N,N,N',N'-tetraphenylbenzidine and 2,3,4,5,6-pentafluorobenzaldehyde. ANOP-8, which incorporates 14.86% fluorine, has a BET surface area of 694 m2 g-1 and a robust C-C structure. It achieves SF6/N2 selectivities of 65 and 51 at 298 K and 1 bar through ideal adsorbed and breakthrough experiments, respectively. Molecular simulations have revealed the adsorption mechanisms, underscoring the potential of fluorinated polymers in developing future adsorbents for toxic gases.
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Affiliation(s)
- Jiangli Zhu
- International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
| | - Danchi Luo
- International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
| | - Qilin Wang
- International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
| | - Sihan Tong
- International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
| | - Zefeng Wang
- College of Ecology, Lishui University, Lishui 323000, China
- R&D Center of Green Manufacturing New Materials and Technology of Synthetic Leather Sichuan University-Lishui University, Lishui 323000, China.
| | - Jun Yan
- International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
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233
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Chen Y, Yin X, Udoessiet NP, Wang J, Zhu J, Luo S. Influence of polypropylene fibers on the tensile mechanical properties of calcium silicate hydrate: molecular simulation. J Mol Model 2024; 30:360. [PMID: 39356315 DOI: 10.1007/s00894-024-06164-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2024] [Accepted: 09/24/2024] [Indexed: 10/03/2024]
Abstract
CONTEXT This research assesses the influence of polypropylene (PP) fibers, both homopolymer and hydroxylated (PPOH), on the tensile properties of calcium silicate hydrate (C-S-H) composites through molecular dynamics (MD) simulations. Our models explore C-S-H matrices integrated with PP and PPOH fibers at varying polymerization degrees. The results demonstrate that both PP and PPOH fibers significantly influence the tensile strength and Young's modulus of the composites. Notably, PPOH fibers contribute to more substantial mechanical enhancements than PP, attributed to the increased polarity and enhanced intermolecular interactions from the hydroxyl groups. The study reveals a nonlinear relationship between polymer additive content and mechanical performance, with optimal properties at a polymerization degree of 20. Additionally, stress-strain analysis indicates that PPOH composites exhibit superior ductility and fracture energy, particularly at polymerization degrees of 20, showing enhanced ultimate strain and fracture energy by up to 9.6% and 13.9%, respectively, compared to PP counterparts. These results highlight the crucial role of tailored polymer additive composition and chemical modifications in maximizing the mechanical efficacy of C-S-H-based materials, enhancing their durability and structural performance. METHODS All MD simulations were conducted using LAMMPS. The models employed a combination of Clayff and Cvff force fields. During the entire tensile simulation, the system was configured under the NPT ensemble at 300 K.
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Affiliation(s)
- Yu Chen
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China.
| | - Xuyang Yin
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China
| | - Ndukeabasi Peter Udoessiet
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China
| | - Jiale Wang
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China
| | - Jiawen Zhu
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China
| | - Shimei Luo
- Department of Civil Engineering, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, People's Republic of China
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234
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Dulong V, Thebault P, Karakasyan C, Picton L, le Cerf D. Polyelectrolyte complexes of chitosan and hyaluronic acid or carboxymethylpullulan and their aminoguaiacol derivatives with biological activities as potential drug delivery systems. Carbohydr Polym 2024; 341:122330. [PMID: 38876726 DOI: 10.1016/j.carbpol.2024.122330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/02/2024] [Accepted: 05/25/2024] [Indexed: 06/16/2024]
Abstract
Polyelectrolyte complexes (PECs) were elaborated from chitosan as cationic polymer and carboxy-methylpullulan (CMP), hyaluronic acid (HA) and their derivatives grafted with aminoguaiacol (G) with different degrees of substitution (DSGA) with the aim of obtaining nanogels for drug delivery. For each couple of polysaccharides, the charge ratios giving the smaller size with the lower PDI were selected to produce PECs. CMP_CHIT and CMP-G_CHIT PECs had smaller sizes (220-280 nm) than HA_CHIT and HA-G_CHIT PECs (280-390 nm). PECs were stable at 4 °C during 28 days at pH 5. In phosphate buffer saline (PBS) at pH 7.4, at 4 °C, a better stability of PECs based on CMP-G derivatives was observed. The hydrophobic associations between aminoguaiacol groups (highlighted by measurements of pyrene fluorescence) led to a better PECs' stabilization in PBS. The PECs' antioxidant and antibacterial activities were demonstrated and related to the DSGA. Diclofenac and curcumin were used as drug models: their loading reached 260 and 53 μg/mg PEC, respectively. The release of diclofenac in PBS at 37 °C followed a quasi-Fickian diffusion mechanism with release constant between 0.88 and 1.04 h-1. The curcumin release followed a slow linear increase in PBS/EtOH (60/40 V/V) with an effect of DSGA.
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Affiliation(s)
- Virginie Dulong
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France.
| | - Pascal Thebault
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Carole Karakasyan
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Luc Picton
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Didier le Cerf
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
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235
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Fang F, Tian Z, Cai Y, Huang L, Van der Meeren P, Wang J. The structural, antioxidant and emulsifying properties of cellulose nanofiber-dihydromyricetin mixtures: Effects of composite ratio. Food Chem 2024; 454:139803. [PMID: 38810448 DOI: 10.1016/j.foodchem.2024.139803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/31/2024]
Abstract
In this work, effects of cellulose nanofiber/dihydromyricetin (CNF/DMY) ratio on the structural, antioxidant and emulsifying properties of the CNF/DMY mixtures were investigated. CNF integrated with DMY via hydrogen bonding and the antioxidant capacity of mixtures increased with decreasing CNF/DMY ratio (k). The oxidative stability of emulsions enhanced as the DMY content increased. Emulsions formed at Φ = 0.5 displayed larger size (about 25 μm), better viscoelasticity and centrifugal stability than those at Φ = 0.3 (about 23 μm). The emulsions at k = 17:3 and Φ = 0.5 exhibited the most excellent viscoelasticity. In conclusion, the DMY content in mixtures and the oil phase fraction exhibited distinct synergistic effects on the formation and characteristics of emulsions, and the emulsions could demonstrate superior oxidative and storage stability. These findings could provide a novel strategy to extend the shelf life of cellulose-based emulsions and related products.
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Affiliation(s)
- Fang Fang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha 410114, China; Hunan Province Prepared Dishes Engineering Technology Research Center, Changsha University of Science & Technology, Changsha 410114, China
| | - Zijing Tian
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Yongjian Cai
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha 410114, China; Hunan Province Prepared Dishes Engineering Technology Research Center, Changsha University of Science & Technology, Changsha 410114, China.
| | - Lihua Huang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha 410114, China; Hunan Province Prepared Dishes Engineering Technology Research Center, Changsha University of Science & Technology, Changsha 410114, China
| | - Paul Van der Meeren
- Particle and Interfacial Technology Group, Ghent University, 9000 Gent, Belgium
| | - Jianhui Wang
- School of Food Science and Bioengineering, Changsha University of Science and Technology, Changsha 410114, China; Hunan Province Prepared Dishes Engineering Technology Research Center, Changsha University of Science & Technology, Changsha 410114, China.
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236
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Ouyang J, Zhang M, Xiong W, Zhou L, Zhao L, Li Z, Zhou C, Chen H, Luo Y, Fang S, Baughman RH. High performance supercapacitors deploying cube-templated tracheid cavities of wood-derived carbon. J Colloid Interface Sci 2024; 671:145-153. [PMID: 38795535 DOI: 10.1016/j.jcis.2024.05.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/21/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
Wood-derived carbon, with its strong tracheid array structure, is an ideal material for use as a self-supporting electrode in supercapacitors. By leveraging the inherent through pore structure and surface affinity found in wood tracheids, we successfully engineered a highly spatially efficient cube-templated porous carbon framework inside carbonized wood tracheid cavities through precise control over precursor crystallization temperatures. This innovative cubic channel architecture effectively maximizes up to (79 ± 1)% of the cavity volume in wood-derived carbon while demonstrating exceptional hydrophilicity and high conductivity properties, facilitating the development of supercapacitors with enhanced areal/volumetric capacitances (2.65F cm-2/53.0F cm-3 at 5.0 mA cm-2) as well as superior areal/volumetric energy densities (0.37 mWh cm-2/7.36 mWh cm-3 at 2.5 mW cm-2). The fabrication of these cube-templated channels with high cube filling content is not only simple and precisely controllable, but also environmentally friendly. The proposed method eliminates the conventional acid-base treatment process for pore formation, facilitating the rapid development and practical implementation of thick electrodes with superior performance in supercapacitors. Moreover, it offers a universal research approach for the commercialization of wood-derived thick electrodes.
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Affiliation(s)
- Jie Ouyang
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Mengmeng Zhang
- The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75080, USA
| | - Wanning Xiong
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Liangliang Zhou
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Linlin Zhao
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Zejun Li
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Cui Zhou
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Hong Chen
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China
| | - Yongfeng Luo
- Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China.
| | - Shaoli Fang
- The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75080, USA.
| | - Ray H Baughman
- The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75080, USA.
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237
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Tenio T, Boakye-Yiadom S. Characterization and selection of a skull surrogate for the development of a biofidelic head model. J Mech Behav Biomed Mater 2024; 158:106680. [PMID: 39153408 DOI: 10.1016/j.jmbbm.2024.106680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 07/30/2024] [Accepted: 08/05/2024] [Indexed: 08/19/2024]
Abstract
This research paper explores the advancement of physical models simulating the human skull-brain complex, focusing on applications in simulating mild Traumatic Brain Injury (mTBI). Existing models, especially head forms, lack biofidelity in accurately representing the native structures of the skull, limiting the understanding of intracranial injury parameters beyond kinematic head accelerations. This study addresses this gap by investigating the use of additive manufacturing (AM) techniques to develop biofidelic skull surrogates. Materials such as Polylactic Acid (PLA), a bone-simulant PLA variant, and Hydroxyapatite-coated Poly(methyl methacrylate) (PMMA) were used to create models tested for their flexural modulus and strength. The trabecular bone regions were simulated by adjusting infill densities (30%, 50%, 80%) and print raster directions, optimizing manufacturing parameters for biofidelic performance. Among the tested materials, PLA and its bone-simulating variant printed at 80% infill density with a side (tangential) print orientation demonstrated the closest approximation to the mechanical properties of cranial bone, yielding a mean flexural modulus of 1337.2 MPa and a mean ultimate strength of 56.9 MPa. Statistical analyses showed that infill density significantly influenced the moduli and strength of the printed simulants. Digital Image Correlation (DIC) corroborated the comparable performance of the simulants, showing similar strain and displacement behaviors to native skull bone. Notably, the performance of the manufactured cortical and trabecular regions underscored their crucial role in achieving biofidelity, with the trabecular structure providing critical dampening effects when the native bone is loaded. This study establishes PLA, particularly its bone-simulant variant, as an optimal candidate for cranial bone simulants, offering significant potential for developing more accurate biofidelic head models in mTBI research.
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Affiliation(s)
- Tristan Tenio
- Lassonde School of Engineering Mechanical Engineering Department , York University , Bergeron Building of Engineering Excellence , 11 Arboretum Lane, North York, ON, M3J2S5, Canada.
| | - Solomon Boakye-Yiadom
- Lassonde School of Engineering Mechanical Engineering Department , York University , Bergeron Building of Engineering Excellence , 11 Arboretum Lane, North York, ON, M3J2S5, Canada
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238
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Gadalla HH, Yuan Z, Chen Z, Alsuwayyid F, Das S, Mitra H, Ardekani AM, Wagner R, Yeo Y. Effects of nanoparticle deformability on multiscale biotransport. Adv Drug Deliv Rev 2024; 213:115445. [PMID: 39222795 DOI: 10.1016/j.addr.2024.115445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 08/16/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
Deformability is one of the critical attributes of nanoparticle (NP) drug carriers, along with size, shape, and surface properties. It affects various aspects of NP biotransport, ranging from circulation and biodistribution to interactions with biological barriers and target cells. Recent studies report additional roles of NP deformability in biotransport processes, including protein corona formation, intracellular trafficking, and organelle distribution. This review focuses on the literature published in the past five years to update our understanding of NP deformability and its effect on NP biotransport. We introduce different methods of modulating and evaluating NP deformability and showcase recent studies that compare a series of NPs in their performance in biotransport events at all levels, highlighting the consensus and disagreement of the findings. It concludes with a perspective on the intricacy of systematic investigation of NP deformability and future opportunities to advance its control toward optimal drug delivery.
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Affiliation(s)
- Hytham H Gadalla
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA; Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Zhongyue Yuan
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Ziang Chen
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Faisal Alsuwayyid
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA; Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh 11481, Saudi Arabia
| | - Subham Das
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN, 47907, USA
| | - Harsa Mitra
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN, 47907, USA
| | - Arezoo M Ardekani
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN, 47907, USA
| | - Ryan Wagner
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN, 47907, USA
| | - Yoon Yeo
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA; Purdue University Institute for Cancer Research, 201 South University Street, West Lafayette, IN, 47907, USA; Weldon School of Biomedical Engineering, Purdue University, 206 S Martin Jischke Drive, West Lafayette, IN 47907, USA.
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239
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Wang Z, Sun Y, Pan Y, Li E, Wang J, Li S, Li C. Impact of sugar and sugar alcohol on the pasting and retrogradation properties of starch with distinct molecular structures. Int J Biol Macromol 2024; 278:134627. [PMID: 39128746 DOI: 10.1016/j.ijbiomac.2024.134627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 07/21/2024] [Accepted: 08/08/2024] [Indexed: 08/13/2024]
Abstract
The molecular structures of starch and sugar/sugar alcohol are recognized as critical determinants of starch pasting and retrogradation properties. However, their combined effects on these properties remain elusive. This study for the first time examined the pasting and retrogradation properties of nine starches with diverse molecular structures, both with and without the addition of glucose, sucrose, isomaltose, isomalt, and sorbitol. The presence of sugar/sugar alcohol significantly enhanced starch pasting viscosity. In particular, the variations of the peak viscosity of wheat starch were more pronounced than other starches, possibly due to its distinct molecular structures. The changes in melting temperatures and enthalpy of retrograded starches were complex, varying depending on the type of starch and sugar/sugar alcohol used. For example, the melting peak temperature ranged from 56.45 °C (TS) to 61.9 °C (WMS), and the melting enthalpy ranged from 0.16 J/g (TS) to 5.6 J/g (PES). The micromorphology of retrograded starch revealed agglomeration and needle-like structures, instead of a network structure, after the addition of glucose and sorbitol, respectively. Correlations between starch molecular structure and pasting properties remained largely unchanged, while the relationship between starch molecular structure and retrogradation properties exhibited notable variations after the addition of sugars or sugar alcohols. These findings help a better understanding of the effects of starch molecular structure and the presence of sugar/sugar alcohol on starch pasting and retrogradation properties.
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Affiliation(s)
- Zihan Wang
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China
| | - Ye Sun
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China
| | - Yujun Pan
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China
| | - Enpeng Li
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
| | - Jun Wang
- School of Tourism and Cuisine, Yangzhou University, Yangzhou 225127, China
| | - Songnan Li
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China.
| | - Cheng Li
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, Jiangsu 225009, China; Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin 999077, Hong Kong, China.
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240
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Fan X, Zheng J, Yeo JCC, Wang S, Li K, Muiruri JK, Hadjichristidis N, Li Z. Dynamic Covalent Bonds Enabled Carbon Fiber Reinforced Polymers Recyclability and Material Circularity. Angew Chem Int Ed Engl 2024; 63:e202408969. [PMID: 39032118 DOI: 10.1002/anie.202408969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 07/10/2024] [Accepted: 07/14/2024] [Indexed: 07/22/2024]
Abstract
Due to their remarkable features of lightweight, high strength, stiffness, high-temperature resistance, and corrosion resistance, carbon fiber reinforced polymers (CFRPs) are extensively used in sports equipment, vehicles, aircraft, windmill blades, and other sectors. The urging need to develop a resource-saving and environmentally responsible society requires the recycling of CFRPs. Traditional CFRPs, on the other hand, are difficult to recycle due to the permanent covalent crosslinking of polymer matrices. The combination of covalent adaptable networks (CANs) with carbon fibers (CFs) marks a new development path for closed-loop recyclable CFRPs and polymer resins. In this review, we summarize the most recent developments of closed-loop recyclable CFRPs from the unique paradigm of dynamic crosslinking polymers, CANs. These sophisticated materials with diverse functions, oriented towards CFs recycling and resin sustainability, are further categorized into several active domains of dynamic covalent bonds, including ester bonds, imine bonds, disulfide bonds, boronic ester bonds, and acetal linkages, etc. Finally, the possible strategies for the future design of recyclable CFPRs by combining dynamic covalent chemistry innovation with materials interface science are proposed.
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Affiliation(s)
- Xiaotong Fan
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore
| | - Jie Zheng
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore
| | - Jayven Chee Chuan Yeo
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Republic of Singapore
| | - Sheng Wang
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore
| | - Ke Li
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Republic of Singapore
| | - Joseph Kinyanjui Muiruri
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore
| | - Nikos Hadjichristidis
- Polymer Synthesis Laboratory, Chemistry Program, KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Zibiao Li
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Republic of Singapore
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Republic of Singapore
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241
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Mukherjee S, Aoki Y, Kawamura S, Sodeoka M. Ligand-Controlled Copper-Catalyzed Halo-Halodifluoromethylation of Alkenes and Alkynes Using Fluorinated Carboxylic Anhydrides. Angew Chem Int Ed Engl 2024; 63:e202407150. [PMID: 38979689 DOI: 10.1002/anie.202407150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 07/08/2024] [Accepted: 07/08/2024] [Indexed: 07/10/2024]
Abstract
Polyhalogenated molecules are often found as bioactive compounds in nature and are used as synthetic building blocks. Fluoroalkyl compounds hold promise for the development of novel pharmaceuticals and agrochemicals, as the introduction of fluoroalkyl groups is known to improve lipophilicity, membrane permeability, and metabolic stability. Three-component 1,2-halo-halodifluoromethylation reactions of alkenes are useful for their synthesis. However, general methods enabling the introduction of halodifluoromethyl (CF2X) and halogen (X') groups in the desired combination of X and X' are lacking. To address this gap, for the first time, we report a three-component halo-halodifluoromethylation of alkenes and alkynes using combinations of commercially available fluorinated carboxylic anhydrides ((CF2XCO)2O, X=Cl and Br) and alkali metal halides (X'=Cl and Br). In situ prepared fluorinated diacyl peroxides were identified as important intermediates, and the use of appropriate bipyridyl-based ligands and a copper catalyst was essential for achieving high product selectivity. The synthetic utility of the polyhalogenated products was demonstrated by exploiting differences in the reactivities of their C-X and C-X' bonds to achieve selective derivatization. Finally, the reaction mechanism and ligand effect were investigated using experimental and theoretical methods to provide important insights for the further development of catalytic reactions.
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Affiliation(s)
- Subrata Mukherjee
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yuma Aoki
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Shintaro Kawamura
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Mikiko Sodeoka
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
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242
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Kämäräinen T, Nakayama Y, Uchiyama H, Tozuka Y, Kadota K. Amyloid Nanofibril-Assisted Spray Drying of Crumpled Supraparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309645. [PMID: 38716922 DOI: 10.1002/smll.202309645] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 03/19/2024] [Indexed: 10/04/2024]
Abstract
Nanofibrils are known to improve the cohesion of supraparticle (SP) assemblies. However, tailoring the morphology of SPs using nanofibrillar additives is not well developed. Herein, β-lactoglobulin amyloid nanofibrils (ANFs) are investigated as means to impart morphological control over the assembly process of spray-dried SPs composed of 10-100 nm silica nanoparticles (SiNPs). Phytoglycogen (PG) and silver nanowires (AgNWs) are used to assess the influence of building block softness and aspect ratio, respectively. The results demonstrate that ANFs promote the onset of structural arrest during the particle consolidation enabling the preparation of corrugated SP morphologies. The critical ANF loading required to induce SP corrugation increases by roughly 1 vol% for every 10-nm increase in SiNP diameter, while the ensuing ANF network density decreases with SiNP volume fraction and increases with SiNP diameter. Results imply that ANF length starts to become influential when it approaches the SiNP diameter. ANFs display a reduced effectiveness in altering soft PG SP morphology compared with hard SiNPs of comparable size. In SiNP-AgNW SPs, ANFs induce a toroid-to-corrugated morphology transformation for sufficiently large SPs and small SiNPs. The results illustrate that ANFs are effective additives for the morphological engineering of spray-dried SPs important for numerous applications.
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Affiliation(s)
- Tero Kämäräinen
- Department of Formulation Design and Pharmaceutical Technology, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan
| | - Yuzuki Nakayama
- Department of Formulation Design and Pharmaceutical Technology, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan
| | - Hiromasa Uchiyama
- Department of Formulation Design and Pharmaceutical Technology, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan
| | - Yuichi Tozuka
- Department of Formulation Design and Pharmaceutical Technology, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan
| | - Kazunori Kadota
- Department of Formulation Design and Pharmaceutical Technology, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan
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243
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Jacquot G, Lopez Navarro P, Grange C, Boudali L, Harlepp S, Pivot X, Detappe A. Landscape of Subcutaneous Administration Strategies for Monoclonal Antibodies in Oncology. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2406604. [PMID: 39165046 DOI: 10.1002/adma.202406604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 07/15/2024] [Indexed: 08/22/2024]
Abstract
In recent decades, subcutaneous (SC) administration of monoclonal antibodies (mAbs) has emerged as a promising alternative to intravenous delivery in oncology, offering comparable therapeutic efficacy while addressing patient preferences. This perspective article provides an in-depth analysis of the technological landscape surrounding SC mAb administration in oncology. It outlines various technologies under evaluation across developmental stages, spanning from preclinical investigations to the integration of established methodologies in clinical practice. Additionally, this perspective article explores emerging trends and prospective trajectories, shedding light on the evolving landscape of SC mAb administration. Furthermore, it emphasizes key checkpoints related to quality attributes essential for optimizing mAb delivery via the SC route. This review serves as a valuable resource for researchers, clinicians, and healthcare policymakers, offering insights into the advancement of SC mAb administration in oncology and its implications for patient care.
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Affiliation(s)
- Guillaume Jacquot
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Pedro Lopez Navarro
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Coralie Grange
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Lotfi Boudali
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Sébastien Harlepp
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Xavier Pivot
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
| | - Alexandre Detappe
- Institut de Cancérologie Strasbourg Europe, Strasbourg, 67000, France
- Equipe labellisée Ligue contre le Cancer, France
- Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, 67000, France
- Equipe de Synthèse Pour l'Analyse, Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/University of Strasbourg, Strasbourg, Cedex 2, 67087, France
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244
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Uchiyama M, Ohira N, Yamashita K, Sagawa K, Kamigaito M. Proton transfer anionic polymerization with C-H bond as the dormant species. Nat Chem 2024; 16:1630-1637. [PMID: 38965437 DOI: 10.1038/s41557-024-01572-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 06/06/2024] [Indexed: 07/06/2024]
Abstract
Living anionic polymerization-the most common living polymerization and the one with the longest history-generally requires stringent, water-free conditions and one metal initiator per polymer chain. Here we present the proton transfer anionic polymerization of methacrylates using acidic C-H bonds as the dormant species that are activated by base catalysts. The polymerization mechanism involves reversible chain transfer or termination of the growing enolate species. A weakly acidic compound, such as an alkyl isobutyrate, serves as the initiator or chain-transfer agent in the presence of a bulky potassium base catalyst to produce a polymer chain and, thereby, diminishes the metal compound per chain ratio. An added alcohol serves as a reversible terminator to tame the propagation. End-functionalized, star, block and graft polymers are easily accessible from compounds with C-H bonds.
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Affiliation(s)
- Mineto Uchiyama
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan.
| | - Natsumi Ohira
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Konomi Yamashita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Katsutoshi Sagawa
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Masami Kamigaito
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan.
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245
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Shim J, Kim C, Lee M, An S, Jhe W. Multiscale rheology from bulk to nano using a quartz tuning fork-atomic force microscope. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:105104. [PMID: 39365114 DOI: 10.1063/5.0225852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Accepted: 09/11/2024] [Indexed: 10/05/2024]
Abstract
Rheological characteristics exhibit significant variations at nanoscale confinement or near interfaces, compared to bulk rheological properties. To bridge the gap between nano- and bulk-scale rheology, allowing for a better and holistic understanding of rheology, developing a single experimental platform that provides rheological measurements across different scales, from nano to bulk, is desirable. Here, we present the novel methodology for multiscale rheology using a highly sensitive atomic force microscope based on a quartz tuning fork (QTF) force sensor. We employ microscale and nanoscale shear probes attached to the QTF, oscillating parallel to a substrate surface for rheological measurements as a function of the tip-substrate distance with sub-nanometer resolution. Silicone oils with viscosities ranging from 5 cSt to 10 000 cSt are used as calibration samples, and we have successfully derived the bulk rheological moduli. Furthermore, an increase in modulus is observed within the regime of tribo-nanorheology at distances less than 50 nm from the surface. Through such multiscale measurements, it is confirmed that this increase is due to the formation of a layered structure of silicone oil polymers on the solid surface. These results provide a comprehensive understanding of the tribo-rheological properties of complex fluids across different scales.
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Affiliation(s)
- Jaewon Shim
- Center for 0D Nanofluidics, Institute of Applied Physics, Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea
| | - Chungman Kim
- Center for 0D Nanofluidics, Institute of Applied Physics, Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea
| | - Manhee Lee
- Department of Physics, Chungbuk National University, Seowon-Gu, Cheongju 28644, South Korea
| | - Sangmin An
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, South Korea
| | - Wonho Jhe
- Center for 0D Nanofluidics, Institute of Applied Physics, Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea
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246
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Jiang H, Chung C, Dunn ML, Yu K. 4D printing of liquid crystal elastomer composites with continuous fiber reinforcement. Nat Commun 2024; 15:8491. [PMID: 39353959 PMCID: PMC11445243 DOI: 10.1038/s41467-024-52716-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 09/19/2024] [Indexed: 10/03/2024] Open
Abstract
Multifunctional composites have been continuously developed for a myriad of applications with remarkable adaptability to external stimuli and dynamic responsiveness. This study introduces a 4D printing method for liquid crystal elastomer (LCE) composites with continuous fibers and unveils their multifunctional actuation and exciting mechanical responses. During the printing process, the relative motion between the continuous fiber and LCE resin generates shear force to align mesogens and enable the monodomain state of the matrix materials. The printed composite lamina exhibits reversible folding deformations that are programmable by controlling printing parameters. With the incorporation of fiber reinforcement, the LCE composites not only demonstrate high actuation forces but also improved energy absorption and protection capabilities. Diverse shape-changing configurations of 4D composite structures can be achieved by tuning the printing pathway. Moreover, the incorporation of conductive fibers into the LCE matrix enables electrically induced shape morphing in the printed composites. Overall, this cost-effective 4D printing method is poised to serve as an accessible and influential approach when designing diverse applications of LCE composites, particularly in the realms of soft robotics, wearable electronics, artificial muscles, and beyond.
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Affiliation(s)
- Huan Jiang
- Department of Mechanical Engineering, University of Colorado Denver, Denver, CO, 80217, USA
| | - Christopher Chung
- Department of Mechanical Engineering, University of Colorado Denver, Denver, CO, 80217, USA
| | - Martin L Dunn
- Department of Mechanical Engineering, University of Colorado Denver, Denver, CO, 80217, USA.
| | - Kai Yu
- Department of Mechanical Engineering, University of Colorado Denver, Denver, CO, 80217, USA.
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247
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Kocaman C, Batir O, Bukusoglu E. Optically responsive dry cholesteric liquid crystal marbles. J Colloid Interface Sci 2024; 671:374-384. [PMID: 38815373 DOI: 10.1016/j.jcis.2024.05.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/22/2024] [Accepted: 05/25/2024] [Indexed: 06/01/2024]
Abstract
Dry liquid crystal marbles are structures that consist of cholesteric liquid crystal (CLC) droplets prepared by the mixture of chiral-doped thermotropic LCs encapsulated by cellulose nanocrystals (CNCs) that have been dried under ambient conditions. The characterizations revealed that CLC droplets were successfully encapsulated by self-standing CNC shells and responsive to the external gaseous stimulus. The dry LC marbles offer several advantages over previously reported LC-based gas sensors, such as fast response against minor external stimuli, and ease of handling, which make them particularly attractive for practical applications in sensing. We demonstrate the use of these marbles for detecting toluene vapor, a common industrial solvent and pollutant, which we also use to understand the response characteristics. The dry CLC marbles exhibit a significant response to toluene vapor with a detection limit below 500 ppm, attributed to the change of pitch size of the helical structure of CLC droplets induced by the toluene vapor. The CNC-capsulated CLC droplets were stable in emulsion for up to two weeks, and their dried form exhibited a sensitive response upon toluene exposure. The real-time experiments revealed that the LC marbles can be used multiple times without a significant loss of sensitivity, where 90 % of the maximum response was observed at 13.3 ± 4.7 s. These dry LC marbles can also be utilized in other areas, including drug delivery, optical devices, and biosensors.
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Affiliation(s)
- Ceren Kocaman
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye; Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion 1950, Switzerland
| | - Ozge Batir
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye
| | - Emre Bukusoglu
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye.
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248
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Ren Y, Fan X, Cao L, Chen Y. Water-resistant and barrier properties of poly(vinyl alcohol)/nanocellulose films enhanced by metal ion crosslinking. Int J Biol Macromol 2024; 277:134245. [PMID: 39079568 DOI: 10.1016/j.ijbiomac.2024.134245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 07/20/2024] [Accepted: 07/26/2024] [Indexed: 08/09/2024]
Abstract
Polyvinyl alcohol (PVA) is a promising alternative to non-biodegradable flexible packaging materials, and nanocellulose is often used to enhance the properties of PVA films, but the composite films still have poor water resistance and barrier properties. To address this issue, iron ions (Fe3+) were introduced into PVA/cellulose nanofibrils (CNF) films, and Fe3+ formed coordination bonds with carboxyl and hydroxyl groups on the surface of CNF and PVA chains. Therefore, constructing a strong coordination crosslinking network within the film and improving the interfacial interaction between PVA and CNF. The water resistance, mechanical and barrier properties of the crosslinked films were significantly improved. Compared with the un-crosslinked film, the oxygen transmission rate (OTR) was decreased by up to 67 %, and the water swelling ratio was significantly reduced from 1085 % to 352 %. The tensile strength of the film with 1.5 wt% Fe3+ reached 41.93 MPa, which was 62 % higher than that of the un-crosslinked film. Furthermore, the composite film demonstrated good recyclability, almost recovering its original mechanical properties in two recycling tests. This simple and effective method for preparing water resistance and barrier films shows potential applications in flexible packaging areas.
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Affiliation(s)
- Ying Ren
- Guangdong Province Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Xiaoping Fan
- Guangdong Province Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Liming Cao
- Guangdong Province Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Yukun Chen
- Lab of Advanced Elastomer, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
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249
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Breimann S, Kamp F, Steiner H, Frishman D. AAontology: An Ontology of Amino Acid Scales for Interpretable Machine Learning. J Mol Biol 2024; 436:168717. [PMID: 39053689 DOI: 10.1016/j.jmb.2024.168717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 07/15/2024] [Accepted: 07/19/2024] [Indexed: 07/27/2024]
Abstract
Amino acid scales are crucial for protein prediction tasks, many of them being curated in the AAindex database. Despite various clustering attempts to organize them and to better understand their relationships, these approaches lack the fine-grained classification necessary for satisfactory interpretability in many protein prediction problems. To address this issue, we developed AAontology-a two-level classification for 586 amino acid scales (mainly from AAindex) together with an in-depth analysis of their relations-using bag-of-word-based classification, clustering, and manual refinement over multiple iterations. AAontology organizes physicochemical scales into 8 categories and 67 subcategories, enhancing the interpretability of scale-based machine learning methods in protein bioinformatics. Thereby it enables researchers to gain a deeper biological insight. We anticipate that AAontology will be a building block to link amino acid properties with protein function and dysfunctions as well as aid informed decision-making in mutation analysis or protein drug design.
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Affiliation(s)
- Stephan Breimann
- Department of Bioinformatics, School of Life Sciences, Technical University of Munich, Freising, Germany; Ludwig-Maximilians-University Munich, Biomedical Center, Division of Metabolic Biochemistry, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Frits Kamp
- Ludwig-Maximilians-University Munich, Biomedical Center, Division of Metabolic Biochemistry, Munich, Germany
| | - Harald Steiner
- Ludwig-Maximilians-University Munich, Biomedical Center, Division of Metabolic Biochemistry, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Dmitrij Frishman
- Department of Bioinformatics, School of Life Sciences, Technical University of Munich, Freising, Germany.
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250
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Guo T, Xie F, Chen L. Oxidation-induced starch molecular degradation: A comprehensive kinetic investigation using NaClO/NaBr/TEMPO system. Int J Biol Macromol 2024; 277:134283. [PMID: 39084440 DOI: 10.1016/j.ijbiomac.2024.134283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 07/15/2024] [Accepted: 07/28/2024] [Indexed: 08/02/2024]
Abstract
Starch degradation often coincides with its chemical modification, and understanding how chemical modification influences starch degradation is vital for determining the properties of the resultant modified products. This work investigates the effect of oxidation on starch molecular degradation, examining factors such as oxidation degree, reaction kinetics, and degradation patterns during 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated starch oxidation under varying conditions, including reaction time, pH, temperature, and concentrations of NaBr, TEMPO, and NaClO. Results emphasize that extended reaction durations primarily lead to β-elimination, causing α-1,4 linkage cleavages. pH 8.5 favored non-selective oxidation, while pH 11 enhanced β-elimination, both slowing the reaction rate and severely damaging starch chains (Mw of 8.8 × 105 g/mol and 7.2 × 105 g/mol, respectively). Elevated temperature from 0 to 30 °C significantly expedited both selective and non-selective oxidation, dramatically reducing molecular mass to 8.1 × 105 g/mol. Increasing concentrations of NaBr and TEMPO boost the reaction rate with minimal impact on molecular mass. Meanwhile, increasing NaClO concentration from 0.2 to 2.2 mmol/g-starch not only affects the reaction rate but also reinforces β-elimination, enhancing molecular degradation. This study is insightful for starch modification to achieve desired oxidation levels and chain lengths by controlling reaction conditions, offering potential advancements in oxidized starch-based materials like nano micelles.
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Affiliation(s)
- Tianli Guo
- Ministry of Education Engineering Research Center of Starch & Protein Processing, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Fengwei Xie
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom.
| | - Ling Chen
- Ministry of Education Engineering Research Center of Starch & Protein Processing, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
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