99901
|
Qi J, Han J, Zhou X, Yang D, Zhang J, Qiao W, Ma D, Wang ZY. Optimization of Broad-Response and High-Detectivity Polymer Photodetectors by Bandgap Engineering of Weak Donor–Strong Acceptor Polymers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00859] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ji Qi
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jinfeng Han
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaokang Zhou
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Dezhi Yang
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jidong Zhang
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Wenqiang Qiao
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Dongge Ma
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Zhi Yuan Wang
- State Key
Laboratory of Polymer Physics and Chemistry, Changchun Institute of
Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- Department of Chemistry, Carleton University, 1125 Colonel
By Drive, Ottawa, Ontario, Canada K1S 5B6
| |
Collapse
|
99902
|
|
99903
|
Construction of porous cationic frameworks by crosslinking polyhedral oligomeric silsesquioxane units with N-heterocyclic linkers. Sci Rep 2015; 5:11236. [PMID: 26062725 PMCID: PMC4463022 DOI: 10.1038/srep11236] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 05/19/2015] [Indexed: 11/09/2022] Open
Abstract
In fields of materials science and chemistry, ionic-type porous materials attract increasing attention due to significant ion-exchanging capacity for accessing diversified applications. Facing the fact that porous cationic materials with robust and stable frameworks are very rare, novel tactics that can create new type members are highly desired. Here we report the first family of polyhedral oligomeric silsesquioxane (POSS) based porous cationic frameworks (PCIF-n) with enriched poly(ionic liquid)-like cationic structures, tunable mesoporosities, high surface areas (up to 1,025 m(2) g(-1)) and large pore volumes (up to 0.90 cm(3) g(-1)). Our strategy is designing the new rigid POSS unit of octakis(chloromethyl)silsesquioxane and reacting it with the rigid N-heterocyclic cross-linkers (typically 4,4'-bipyridine) for preparing the desired porous cationic frameworks. The PCIF-n materials possess large surface area, hydrophobic and special anion-exchanging property, and thus are used as the supports for loading guest species PMo10V2O40(5-); the resultant hybrid behaves as an efficient heterogeneous catalyst for aerobic oxidation of benzene and H2O2-mediated oxidation of cyclohexane.
Collapse
|
99904
|
Gok O, Kosif I, Dispinar T, Gevrek TN, Sanyal R, Sanyal A. Design and Synthesis of Water-Soluble Multifunctionalizable Thiol-Reactive Polymeric Supports for Cellular Targeting. Bioconjug Chem 2015; 26:1550-60. [PMID: 26030527 DOI: 10.1021/acs.bioconjchem.5b00182] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Design and synthesis of novel water-soluble polymers bearing reactive side chains are actively pursued due to their increasing demand in areas such as bioconjugation and drug delivery. This study reports the fabrication of poly(ethylene glycol) methacrylate based thiol-reactive water-soluble polymeric supports that can serve as targeted drug delivery vehicles. Thiol-reactive maleimide units were incorporated into polymers as side chains by use of a furan-protected maleimide containing monomer. Atom transfer radical polymerization (ATRP) was employed to obtain a family of well-defined copolymers with narrow molecular weight distributions. After the polymerization, the maleimide groups were activated to their reactive form, ready for conjugation with thiol-containing molecules. Efficient functionalization of the maleimide moieties was demonstrated by conjugation of a tripeptide glutathione under mild and reagent-free aqueous conditions. Additionally, hydrophobic thiol-containing dye (Bodipy-SH) and a cyclic peptide-based targeting group (cRGDfC) were sequentially appended onto the maleimide bearing polymers to demonstrate their efficient multifunctionalization. The conjugates were utilized for in vitro experiments over both cancerous and healthy breast cell lines. Obtained results demonstrate that the conjugates were nontoxic, and displayed efficient cellular uptake. The presence of the peptide based targeting group had a clear effect on increasing the uptake of the dye-conjugated polymers into cells when compared to the construct devoid of the peptide. Overall, the facile synthesis and highly efficient multifunctionalization of maleimide-containing thiol-reactive copolymers offer a novel and attractive class of polyethylene glycol-based water-soluble supports for drug delivery.
Collapse
Affiliation(s)
- Ozgul Gok
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Irem Kosif
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Tugba Dispinar
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Tugce Nihal Gevrek
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Rana Sanyal
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| |
Collapse
|
99905
|
Hu J, Whittaker MR, Yu SH, Quinn JF, Davis TP. Nitric Oxide (NO) Cleavable Biomimetic Thermoresponsive Double Hydrophilic Diblock Copolymer with Tunable LCST. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00996] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jinming Hu
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Michael R. Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Sul Hwa Yu
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - John F. Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
- Department
of Chemistry, University of Warwick, Coventry, ULCV4 7AL, U.K
| |
Collapse
|
99906
|
Kirschbaum S, Landfester K, Taden A. Synthesis and Thermal Curing of Benzoxazine Functionalized Polyurethanes. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00954] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Kirschbaum
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Henkel AG & Co. KGaA, Adhesive Research, Henkelstrasse 67, 40191 Düsseldorf, Germany
| | - Katharina Landfester
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
| | - Andreas Taden
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Henkel AG & Co. KGaA, Adhesive Research, Henkelstrasse 67, 40191 Düsseldorf, Germany
| |
Collapse
|
99907
|
Xue X, Wang Y, Huang W, Yang H, Chen J, Fang J, Yang Y, Kong L, Jiang B. New Insight into the ATRP of Monovinyl and Divinyl Monomers. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoqiang Xue
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Yonglei Wang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Wenyang Huang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Hongjun Yang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Jianhai Chen
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Jianbo Fang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Yang Yang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Lizhi Kong
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| | - Bibiao Jiang
- Jiangsu Key Laboratory of Materials Surface Science and Technology; School of Materials Science and Engineering; Changzhou University; Changzhou 213164 P.R. China
| |
Collapse
|
99908
|
Shweta K, Jha H. Rice husk extracted lignin-TEOS biocomposites: Effects of acetylation and silane surface treatments for application in nickel removal. ACTA ACUST UNITED AC 2015. [PMID: 28626719 PMCID: PMC5466048 DOI: 10.1016/j.btre.2015.05.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel lignosilicate (LS) composite was synthesized from pre-extracted (hot water, 80% ethanol, 0.3 N NaOH) lignin of rice husk (RH) using TEOS as matrix. The extracted lignins were subjected to surface modification by acetylation followed by in situ synthesis of lignosilicate (LS) composites by sol–gel method for application in nickel removal. LS were characterized by FT-IR, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), particle size distribution (PSD) and atomic absorption spectroscopy (AAS). FT-IR studies showed acetyl group in the range of 1680–1690 cm−1 whereas for adsorbed Si—O—Ni2+ the band appeared at 870 cm−1. Findings suggest that alkali extracted LS with mean PSD of 14.89 nm are thermally more stable (Tm = 337 °C) than ethanol (ELS) and hot water (HLS) extracted LS, and exhibit potential for Ni2+ removal (38.74%). SEM and PSD (D50) analyses confirmed their rough surfaces and dispersive nature, respectively, suitable for metal biosorption.
Collapse
Affiliation(s)
| | - Harit Jha
- Corresponding author. Tel.: +91 9826 630805/7522 260405; fax: +91 7752 260148
| |
Collapse
|
99909
|
Luo YL, Han M, Xu F, Chen YS, Zhang YQ. pH-Responsive H-Type PMAA2
-b
-HTPBN-b
-PMAA2
Four-Arm Star Block Copolymer Micelles for PTX Drug Release. Macromol Biosci 2015; 15:1411-22. [DOI: 10.1002/mabi.201500103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 05/06/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Yan-Ling Luo
- Key Laboratory of Macromolecular Science of Shaanxi Province; School of Chemistry & Chemical Engineering; Shaanxi Normal University; Xi'an 710062 People's Republic of China
| | - Mei Han
- Key Laboratory of Macromolecular Science of Shaanxi Province; School of Chemistry & Chemical Engineering; Shaanxi Normal University; Xi'an 710062 People's Republic of China
| | - Feng Xu
- Key Laboratory of Macromolecular Science of Shaanxi Province; School of Chemistry & Chemical Engineering; Shaanxi Normal University; Xi'an 710062 People's Republic of China
| | - Ya-Shao Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province; School of Chemistry & Chemical Engineering; Shaanxi Normal University; Xi'an 710062 People's Republic of China
| | - Yong-Qin Zhang
- Key Laboratory of Macromolecular Science of Shaanxi Province; School of Chemistry & Chemical Engineering; Shaanxi Normal University; Xi'an 710062 People's Republic of China
| |
Collapse
|
99910
|
|
99911
|
Pandey TP, Maes AM, Sarode HN, Peters BD, Lavina S, Vezzù K, Yang Y, Poynton SD, Varcoe JR, Seifert S, Liberatore MW, Di Noto V, Herring AM. Interplay between water uptake, ion interactions, and conductivity in an e-beam grafted poly(ethylene-co-tetrafluoroethylene) anion exchange membrane. Phys Chem Chem Phys 2015; 17:4367-78. [PMID: 25578464 DOI: 10.1039/c4cp05755d] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate that the true hydroxide conductivity in an e-beam grafted poly(ethylene-co-tetrafluoroethylene) [ETFE] anion exchange membrane (AEM) is as high as 132 mS cm(-1) at 80 °C and 95% RH, comparable to a proton exchange membrane, but with very much less water present in the film. To understand this behaviour we studied ion transport of hydroxide, carbonate, bicarbonate and chloride, as well as water uptake and distribution. Water uptake of the AEM in water vapor is an order of magnitude lower than when submerged in liquid water. In addition (19)F pulse field gradient spin echo NMR indicates that there is little tortuosity in the ionic pathways through the film. A complete analysis of the IR spectrum of the AEM and the analyses of water absorption using FT-IR led to conclusion that the fluorinated backbone chains do not interact with water and that two types of water domains exist within the membrane. The reduction in conductivity was measured during exposure of the OH(-) form of the AEM to air at 95% RH and was seen to be much slower than the reaction of CO2 with OH(-) as the amount of water in the film determines its ionic conductivity and at relative wet RHs its re-organization is slow.
Collapse
Affiliation(s)
- Tara P Pandey
- Department of Chemical and Biological Engineering, Colorado School of Mines, Golden, CO 80401, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
99912
|
Insights into Diversity and Imputed Metabolic Potential of Bacterial Communities in the Continental Shelf of Agatti Island. PLoS One 2015; 10:e0129864. [PMID: 26066038 PMCID: PMC4465901 DOI: 10.1371/journal.pone.0129864] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 05/13/2015] [Indexed: 02/01/2023] Open
Abstract
Marine microbes play a key role and contribute largely to the global biogeochemical cycles. This study aims to explore microbial diversity from one such ecological hotspot, the continental shelf of Agatti Island. Sediment samples from various depths of the continental shelf were analyzed for bacterial diversity using deep sequencing technology along with the culturable approach. Additionally, imputed metagenomic approach was carried out to understand the functional aspects of microbial community especially for microbial genes important in nutrient uptake, survival and biogeochemical cycling in the marine environment. Using culturable approach, 28 bacterial strains representing 9 genera were isolated from various depths of continental shelf. The microbial community structure throughout the samples was dominated by phylum Proteobacteria and harbored various bacterioplanktons as well. Significant differences were observed in bacterial diversity within a short region of the continental shelf (1-40 meters) i.e. between upper continental shelf samples (UCS) with lesser depths (i.e. 1-20 meters) and lower continental shelf samples (LCS) with greater depths (i.e. 25-40 meters). By using imputed metagenomic approach, this study also discusses several adaptive mechanisms which enable microbes to survive in nutritionally deprived conditions, and also help to understand the influence of nutrition availability on bacterial diversity.
Collapse
|
99913
|
Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles. THEOR EXP CHEM+ 2015. [DOI: 10.1007/s11237-015-9401-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
99914
|
Maaßen W, Oelmann S, Peter D, Oswald W, Willenbacher N, Meier MAR. Novel Insights into Pressure-Sensitive Adhesives Based on Plant Oils. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500136] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wiebke Maaßen
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Karlsruhe Institute of Technology (KIT); Institute for Mechanical Process Engineering and Mechanics (MVM); Gotthard-Franz-Straße 3 76131 Karlsruhe Germany
| | - Stefan Oelmann
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - David Peter
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Walter Oswald
- Karlsruhe Institute of Technology (KIT); Institute for Mechanical Process Engineering and Mechanics (MVM); Gotthard-Franz-Straße 3 76131 Karlsruhe Germany
| | - Norbert Willenbacher
- Karlsruhe Institute of Technology (KIT); Institute for Mechanical Process Engineering and Mechanics (MVM); Gotthard-Franz-Straße 3 76131 Karlsruhe Germany
| | - Michael A. R. Meier
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| |
Collapse
|
99915
|
Izumiseki A, Yamamoto H. Selective Michael Reaction Controlled by Supersilyl Protecting Group. Angew Chem Int Ed Engl 2015; 54:8697-9. [DOI: 10.1002/anie.201503574] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 05/17/2015] [Indexed: 11/11/2022]
|
99916
|
Haruk AM, Mativetsky JM. Supramolecular Approaches to Nanoscale Morphological Control in Organic Solar Cells. Int J Mol Sci 2015; 16:13381-406. [PMID: 26110382 PMCID: PMC4490500 DOI: 10.3390/ijms160613381] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 06/06/2015] [Accepted: 06/08/2015] [Indexed: 02/07/2023] Open
Abstract
Having recently surpassed 10% efficiency, solar cells based on organic molecules are poised to become a viable low-cost clean energy source with the added advantages of mechanical flexibility and light weight. The best-performing organic solar cells rely on a nanostructured active layer morphology consisting of a complex organization of electron donating and electron accepting molecules. Although much progress has been made in designing new donor and acceptor molecules, rational control over active layer morphology remains a central challenge. Long-term device stability is another important consideration that needs to be addressed. This review highlights supramolecular strategies for generating highly stable nanostructured organic photovoltaic active materials by design.
Collapse
Affiliation(s)
- Alexander M Haruk
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, NY 13902, USA.
- Department of Chemistry, Binghamton University, Binghamton, NY 13902, USA.
| | - Jeffrey M Mativetsky
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, NY 13902, USA.
| |
Collapse
|
99917
|
Jermakowicz-Bartkowiak D, Cyganowski P. Effect of Microwave Radiation on the Synthesis of Ion Exchange Resins: A Comparative Study. SOLVENT EXTRACTION AND ION EXCHANGE 2015. [DOI: 10.1080/07366299.2015.1046301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
99918
|
Stability, Intracellular Delivery, and Release of siRNA from Chitosan Nanoparticles Using Different Cross-Linkers. PLoS One 2015; 10:e0128963. [PMID: 26068222 PMCID: PMC4465927 DOI: 10.1371/journal.pone.0128963] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 05/04/2015] [Indexed: 01/14/2023] Open
Abstract
Chitosan (CS) nanoparticles have been extensively studied for siRNA delivery; however, their stability and efficacy are highly dependent on the types of cross-linker used. To address this issue, three common cross-linkers; tripolyphosphate (TPP), dextran sulphate (DS) and poly-D-glutamic acid (PGA) were used to prepare siRNA loaded CS-TPP/DS/PGA nanoparticles by ionic gelation method. The resulting nanoparticles were compared with regard to their physicochemical properties including particle size, zeta potential, morphology, binding and encapsulation efficiencies. Among all the formulations prepared with different cross linkers, CS-TPP-siRNA had the smallest particle size (ranged from 127 ± 9.7 to 455 ± 12.9 nm) with zeta potential ranged from +25.1 ± 1.5 to +39.4 ± 0.5 mV, and high entrapment (>95%) and binding efficiencies. Similarly, CS-TPP nanoparticles showed better siRNA protection during storage at 4˚C and as determined by serum protection assay. TEM micrographs revealed the assorted morphology of CS-TPP-siRNA nanoparticles in contrast to irregular morphology displayed by CS-DS-siRNA and CS-PGA-siRNA nanoparticles. All siRNA loaded CS-TPP/DS/PGA nanoparticles showed initial burst release followed by sustained release of siRNA. Moreover, all the formulations showed low and concentration-dependent cytotoxicity with human colorectal cancer cells (DLD-1), in vitro. The cellular uptake studies with CS-TPP-siRNA nanoparticles showed successful delivery of siRNA within cytoplasm of DLD-1 cells. The results demonstrate that ionically cross-linked CS-TPP nanoparticles are biocompatible non-viral gene delivery system and generate a solid ground for further optimization studies, for example with regard to steric stabilization and targeting.
Collapse
|
99919
|
Ruellan A, Guinault A, Sollogoub C, Ducruet V, Domenek S. Solubility factors as screening tools of biodegradable toughening agents of polylactide. J Appl Polym Sci 2015. [DOI: 10.1002/app.42476] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexandre Ruellan
- Laboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers ParisTech; 21 Rue Pinel F-75013 Paris France
- Unité Mixte de Recherche; 1145 Ingénierie Procédés Aliments, AgroParisTech, 1 Avenue des Olympiades F-91300 Massy France
- Département R&D; Brodart Packaging; 1 Rue du Stand F-10700 Arcis-Sur-Aube France
| | - Alain Guinault
- Laboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers ParisTech; 21 Rue Pinel F-75013 Paris France
- Laboratoire Propriétés et Architectures des Alliages et Mélanges, CNAM; 2 Rue Conté F-75003 Paris France
| | - Cyrille Sollogoub
- Laboratoire Procédés et Ingénierie en Mécanique et Matériaux, Arts et Métiers ParisTech; 21 Rue Pinel F-75013 Paris France
- Laboratoire Propriétés et Architectures des Alliages et Mélanges, CNAM; 2 Rue Conté F-75003 Paris France
| | - Violette Ducruet
- Unité Mixte de Recherche; 1145 Ingénierie Procédés Aliments, INRA, 1 Avenue des Olympiades F-91300 Massy France
| | - Sandra Domenek
- Unité Mixte de Recherche; 1145 Ingénierie Procédés Aliments, AgroParisTech, 1 Avenue des Olympiades F-91300 Massy France
| |
Collapse
|
99920
|
Wübbeler JH, Hiessl S, Meinert C, Poehlein A, Schuldes J, Daniel R, Steinbüchel A. The genome of Variovorax paradoxus strain TBEA6 provides new understandings for the catabolism of 3,3'-thiodipropionic acid and hence the production of polythioesters. J Biotechnol 2015; 209:85-95. [PMID: 26073999 DOI: 10.1016/j.jbiotec.2015.06.390] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 06/01/2015] [Accepted: 06/09/2015] [Indexed: 11/30/2022]
Abstract
The betaproteobacterium Variovorax paradoxus strain TBEA6 is capable of using 3,3'-thiodipropionic acid (TDP) as sole carbon and energy source for growth. This thioether is employed for several industrial applications. It can be applied as precursor for the biotechnical production of polythioesters (PTE), which represent persistent bioplastics. Consequently, the genome of V. paradoxus strain TBEA6 was sequenced. The draft genome sequence comprises approximately 7.2Mbp and 6852 predicted open reading frames. Furthermore, transposon mutagenesis to unravel the catabolism of TDP in strain TBEA6 was performed. Screening of 20,000 mutants mapped the insertions of Tn5::mob in 32 mutants, which all showed no growth with TDP as sole carbon source. Based on the annotated genome sequence together with transposon-induced mutagenesis, defined gene deletions, in silico analyses and comparative genomics, a comprehensive pathway for the catabolism of TDP is proposed: TDP is imported via the tripartite tricarboxcylate transport system and/or the TRAP-type dicarboxylate transport system. The initial cleavage of TDP into 3-hydroxypropionic acid (3HP) and 3-mercaptopropionic acid (3MP), which serves as precursor substrate for PTE synthesis, is most probably performed by the FAD-dependent oxidoreductase Fox. 3HP is presumably catabolized via malonate semialdehyde, whereas 3MP is oxygenated by the 3MP-dioxygenase Mdo yielding 3-sulfinopropionic acid (3SP). Afterwards, 3SP is linked to coenzyme A. The next step is the abstraction of sulfite by a desulfinase, and the resulting propionyl-CoA enters the central metabolism. Sulfite is oxidized to sulfate by the sulfite-oxidizing enzyme SoeABC and is subsequently excreted by the cells by the sulfate exporter Pse.
Collapse
Affiliation(s)
- Jan Hendrik Wübbeler
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Sebastian Hiessl
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Christina Meinert
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Anja Poehlein
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Jörg Schuldes
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Rolf Daniel
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Alexander Steinbüchel
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany; Faculty of Biology, King Abdulaziz University, Jeddah, Saudi Arabia.
| |
Collapse
|
99921
|
Xu Z, Shi G, Yuan J, Glenn E, Wang HQ, Ma W. New Semiconducting Polymer Based on Benzo[1,2-b:4,5-b′]diselenophene Donor and Diketopyrrolopyrrole/Isoindigo Acceptor Unit: Synthesis, Characterization and Photovoltaics. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500270] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
99922
|
Dunderdale GJ, England MW, Urata C, Hozumi A. Polymer Brush Surfaces Showing Superhydrophobicity and Air-Bubble Repellency in a Variety of Organic Liquids. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12220-12229. [PMID: 25988214 DOI: 10.1021/acsami.5b02634] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Silicon (Si) substrates were modified with polyalkyl methacrylate brushes having different alkyl chain lengths (C(n), where n = 1, 4, 8, and 18) using ARGET-ATRP at ambient temperature without purging the reaction solution of oxygen. The dynamic hydrophobicity of these polymer brush-covered Si surfaces when submerged in a variety of organic solvents (1-butanol, dichloromethane, toluene, n-hexane) depended markedly on the alkyl chain length and to a lesser extent polymer solubility. Long-chain poly(stearyl methacrylate) brushes (C(n) = 18) submerged in toluene showed excellent water-repellant properties, having large advancing/receding contact angles (CAs) of 169°/168° with negligible CA hysteresis (1°). Whereas polymer brushes with short alkyl-chain (C(n) ≤ 4) had significantly worse water drop mobility because of small CAs (as low as 125°/55°) and large CA hysteresis (up to 70°). However, such poor dynamic dewetting behavior of these surfaces was found to significantly improve when water drops impacted onto the surfaces at moderate velocities. Under these conditions, all brush surfaces were able to expel water drops from their surface. In addition, our brush surfaces were also highly repellant toward air bubbles under all conditions, irrespective of C(n) or polymer solubility. These excellent surface properties were found to be vastly superior to the performance of conventional perfluoroalkylsilane-derived surfaces.
Collapse
Affiliation(s)
- Gary J Dunderdale
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| | - Matt W England
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| | - Chihiro Urata
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| | - Atsushi Hozumi
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| |
Collapse
|
99923
|
Poupart R, Haider A, Babinot J, Kang IK, Malval JP, Lalevée J, Andalloussi SA, Langlois V, Versace DL. Photoactivable Surface of Natural Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) for Antiadhesion Applications. ACS Biomater Sci Eng 2015; 1:525-538. [DOI: 10.1021/acsbiomaterials.5b00002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- R. Poupart
- Institut
de Chimie et des Matériaux Paris-Est, Equipe Systèmes
Polymères Complexes, UMR 7182, CNRS-Université Paris-Est Créteil Val de Marne, 2−8 rue Henri Dunant, 94320 Thiais, France
| | - A. Haider
- Department
of Polymer Science and Engineering, Kyungpook National University, Daegu 702-701, South Korea
| | - J. Babinot
- Institut
de Chimie et des Matériaux Paris-Est, Equipe Systèmes
Polymères Complexes, UMR 7182, CNRS-Université Paris-Est Créteil Val de Marne, 2−8 rue Henri Dunant, 94320 Thiais, France
| | - I.-K. Kang
- Department
of Polymer Science and Engineering, Kyungpook National University, Daegu 702-701, South Korea
| | - J.-P. Malval
- Institut
de Science des Matériaux de Mulhouse, IS2M-LRC 7228, 15 rue
Starcky, 68057 Mulhouse, France
| | - J. Lalevée
- Institut
de Science des Matériaux de Mulhouse, IS2M-LRC 7228, 15 rue
Starcky, 68057 Mulhouse, France
| | - S. Abbad Andalloussi
- Unité
Bioemco Equipe IBIOS, UMR 7618 CNRS, Université Paris-Est Créteil Val-de-Marne, 61 Avenue Général de Gaulle, 94010 Créteil cedex, France
| | - V. Langlois
- Institut
de Chimie et des Matériaux Paris-Est, Equipe Systèmes
Polymères Complexes, UMR 7182, CNRS-Université Paris-Est Créteil Val de Marne, 2−8 rue Henri Dunant, 94320 Thiais, France
| | - D. L. Versace
- Institut
de Chimie et des Matériaux Paris-Est, Equipe Systèmes
Polymères Complexes, UMR 7182, CNRS-Université Paris-Est Créteil Val de Marne, 2−8 rue Henri Dunant, 94320 Thiais, France
| |
Collapse
|
99924
|
Hao X, Li Q, Lv J, Yu L, Ren X, Zhang L, Feng Y, Zhang W. CREDVW-Linked Polymeric Micelles As a Targeting Gene Transfer Vector for Selective Transfection and Proliferation of Endothelial Cells. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12128-12140. [PMID: 26011845 DOI: 10.1021/acsami.5b02399] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nowadays, gene transfer technology has been widely used to promote endothelialization of artificial vascular grafts. However, the lack of gene vectors with low cytotoxicity and targeting function still remains a pressing challenge. Herein, polyethylenimine (PEI, 1.8 kDa or 10 kDa) was conjugated to an amphiphilic and biodegradable diblock copolymer poly(ethylene glycol)-b-poly(lactide-co-glycolide) (mPEG-b-PLGA) to prepare mPEG-b-PLGA-g-PEI copolymers with the aim to develop gene vectors with low cytotoxicity while high transfection efficiency. The micelles were prepared from mPEG-b-PLGA-g-PEI copolymers by self-assembly method. Furthermore, Cys-Arg-Glu-Asp-Val-Trp (CREDVW) peptide was linked to micelle surface to enable the micelles with special recognition for endothelial cells (ECs). In addition, pEGFP-ZNF580 plasmids were condensed into these CREDVW-linked micelles to enhance the proliferation of ECs. These CREDVW-linked micelle/pEGFP-ZNF580 complexes exhibited low cytotoxicity by MTT assay. The cell transfection results demonstrated that pEGFP-ZNF580 could be transferred into ECs efficiently by these micelles. The results of Western blot analysis showed that the relative ZNF580 protein level in transfected ECs increased to 76.9%. The rapid migration of transfected ECs can be verified by wound healing assay. These results indicated that CREDVW-linked micelles could be a suitable gene transfer vector with low cytotoxicity and high transfection efficiency, which has great potential for rapid endothelialization of artificial blood vessels.
Collapse
Affiliation(s)
- Xuefang Hao
- §Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Qian Li
- §Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Juan Lv
- §Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | - Li Yu
- §Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
| | | | - Li Zhang
- ⊥Joint Laboratory for Biomaterials and Regenerative Medicine, Tianjin University-Helmholtz-Zentrum Geesthacht, Weijin Road 92, Tianjin 300072, China
| | - Yakai Feng
- §Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China
- ⊥Joint Laboratory for Biomaterials and Regenerative Medicine, Tianjin University-Helmholtz-Zentrum Geesthacht, Weijin Road 92, Tianjin 300072, China
| | - Wencheng Zhang
- #Department of Physiology and Pathophysiology, Logistics University of Chinese People's Armed Police Force, Tianjin 300162, China
| |
Collapse
|
99925
|
Cheng T, Zhang Y, Lai WY, Huang W. Stretchable Thin-Film Electrodes for Flexible Electronics with High Deformability and Stretchability. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:3349-3376. [PMID: 25920067 DOI: 10.1002/adma.201405864] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/15/2015] [Indexed: 06/04/2023]
Abstract
Flexible and stretchable electronics represent today's cutting-edge electronic technologies. As the most-fundamental component of electronics, the thin-film electrode remains the research frontier due to its key role in the successful development of flexible and stretchable electronic devices. Stretchability, however, is generally more challenging to achieve than flexibility. Stretchable electronic devices demand, above all else, that the thin-film electrodes have the capacity to absorb a large level of strain (>>1%) without obvious changes in their electrical performance. This article reviews the progress in strategies for obtaining highly stretchable thin-film electrodes. Applications of stretchable thin-film electrodes fabricated via these strategies are described. Some perspectives and challenges in this field are also put forward.
Collapse
Affiliation(s)
- Tao Cheng
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Yizhou Zhang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Wen-Yong Lai
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| |
Collapse
|
99926
|
Rodda AE, Ercole F, Glattauer V, Gardiner J, Nisbet DR, Healy KE, Forsythe JS, Meagher L. Low Fouling Electrospun Scaffolds with Clicked Bioactive Peptides for Specific Cell Attachment. Biomacromolecules 2015; 16:2109-18. [DOI: 10.1021/acs.biomac.5b00483] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Andrew E. Rodda
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
- Cooperative Research
Centre for Polymers, 8 Redwood Drive, Notting Hill 3168, Victoria, Australia
| | - Francesca Ercole
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology,
Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, 381
Royal Parade, Parkville 3052, Victoria, Australia
| | - Veronica Glattauer
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
| | - James Gardiner
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
| | - David R. Nisbet
- School
of Engineering, The Australian National University, Canberra 0200, Australian Capital Territory, Australia
| | - Kevin E. Healy
- Departments
of Bioengineering and Materials Science and Engineering, University of California at Berkeley, Berkeley, California, United States
| | - John S. Forsythe
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Laurence Meagher
- Department of Materials Science and Engineering & Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton 3168, Victoria, Australia
- Cooperative Research
Centre for Polymers, 8 Redwood Drive, Notting Hill 3168, Victoria, Australia
| |
Collapse
|
99927
|
ter Huurne GM, Gillissen MAJ, Palmans ARA, Voets IK, Meijer EW. The Coil-to-Globule Transition of Single-Chain Polymeric Nanoparticles with a Chiral Internal Secondary Structure. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00604] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Gijs M. ter Huurne
- Institute for Complex Molecular Systems, Laboratory of
Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Martijn A. J. Gillissen
- Institute for Complex Molecular Systems, Laboratory of
Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Anja R. A. Palmans
- Institute for Complex Molecular Systems, Laboratory of
Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ilja K. Voets
- Institute for Complex Molecular Systems, Laboratory of
Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - E. W. Meijer
- Institute for Complex Molecular Systems, Laboratory of
Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
99928
|
Liu C, Liu Z, Yin X, Wu G. Tuning the Dynamic Fragility of Acrylic Polymers by Small Molecules: The Interplay of Hydrogen Bonding Strength. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00489] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Chongyang Liu
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, 130 Meilong Rd., Shanghai 200237, China
| | - Zhiyuan Liu
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, 130 Meilong Rd., Shanghai 200237, China
| | - Xiaotong Yin
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, 130 Meilong Rd., Shanghai 200237, China
| | - Guozhang Wu
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, 130 Meilong Rd., Shanghai 200237, China
| |
Collapse
|
99929
|
Abdi A, Shahrokhi M, Ramazani S. A A, Vafa E. Theoretical and experimental investigations of the inverse emulsion polymerization of acrylamide. J Appl Polym Sci 2015; 132:n/a-n/a. [DOI: 10.1002/app.41916] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Affiliation(s)
- Ardeshir Abdi
- Department of Chemical and Petroleum Engineering; Sharif University of Technology; P. O. Box 11155-9645 Tehran Iran
| | - Mohammad Shahrokhi
- Department of Chemical and Petroleum Engineering; Sharif University of Technology; P. O. Box 11155-9645 Tehran Iran
| | - Ahmad Ramazani S. A
- Department of Chemical and Petroleum Engineering; Sharif University of Technology; P. O. Box 11155-9645 Tehran Iran
| | - Ehsan Vafa
- Department of Chemical and Petroleum Engineering; Sharif University of Technology; P. O. Box 11155-9645 Tehran Iran
| |
Collapse
|
99930
|
De León AS, Garnier T, Jierry L, Boulmedais F, Muñoz-Bonilla A, Rodríguez-Hernández J. Enzymatic Catalysis Combining the Breath Figures and Layer-by-Layer Techniques: Toward the Design of Microreactors. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12210-12219. [PMID: 25984795 DOI: 10.1021/acsami.5b02607] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Herein, we report the fabrication of microstructured porous surfaces with controlled enzymatic activity by combining the breath figures and the layer-by-layer techniques. Two different types of porous surfaces were designed based on fluorinated and carboxylated copolymers in combination with PS, using poly(2,3,4,5,6-pentafluorostyrene)-b-polystyrene (PS5F31-b-PS21) and polystyrene-b-poly(acrylic acid) (PS19-b-PAA10) block copolymers, respectively. For comparative purposes, flat surfaces having similar chemistry were obtained by spin-coating. Poly(sodium 4-styrenesulfonate)/poly(allylamine hydrochloride) (PSS/PAH) multilayers incorporating alkaline phosphatase (ALP) were built on these porous surfaces to localize the enzyme both inside and outside of the pores using PS/PS5F31-b-PS21 surfaces and only inside the pores on PS/PS19-b-PAA10 surfaces. A higher catalytic activity of ALP (about three times) was obtained with porous surfaces compared to the flat ones. The catalysis happens specifically inside the holes of PS/PS19-b-PAA10surfaces, where ALP is located. This opens the route for applications in microreactors.
Collapse
Affiliation(s)
- A S De León
- †Instituto de Ciencia y Tecnología de Polímeros (ICTP), Consejo Superior de Investigaciones Científicas (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
| | - T Garnier
- ‡Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22, 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
| | - L Jierry
- ‡Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22, 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- §Institute of Advanced Study, University of Strasbourg, 5 allée du Général Rouvillois, 67083 Strasbourg, France
- ⊥Ecole de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - F Boulmedais
- ‡Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22, 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- §Institute of Advanced Study, University of Strasbourg, 5 allée du Général Rouvillois, 67083 Strasbourg, France
| | - A Muñoz-Bonilla
- #Departamento de Química-Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Cantoblanco, 28049 Madrid, Spain
| | - J Rodríguez-Hernández
- †Instituto de Ciencia y Tecnología de Polímeros (ICTP), Consejo Superior de Investigaciones Científicas (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
| |
Collapse
|
99931
|
Strong LE, West JL. Hydrogel-Coated Near Infrared Absorbing Nanoshells as Light-Responsive Drug Delivery Vehicles. ACS Biomater Sci Eng 2015; 1:685-692. [PMID: 26366438 PMCID: PMC4565577 DOI: 10.1021/acsbiomaterials.5b00111] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 06/10/2015] [Indexed: 12/02/2022]
Abstract
![]()
Nanoparticle drug delivery carriers
that can modulate drug release
based on an exogenous signal, such as light, are of great interest,
especially for improving cancer therapy. A light-activated delivery
vehicle was fabricated by synthesizing a thin, thermally responsive
poly(N-isopropylacrylamide-co-acrylamide)
hydrogel coating directly onto the surfaces of individual near-infrared
(NIR) absorbing gold-silica nanoshells. This hydrogel was designed
to be in a swollen state under physiological conditions and expel
large amounts of water, along with any entrapped drug, at elevated
temperatures. The required temperature change can be achieved via
NIR absorption by the nanoshell, allowing the hydrogel phase change
to be triggered by light, which was observed by monitoring changes
in particle sizes as water was expelled from the hydrogel network.
The phase change was reversible and repeatable. As a model drug, the
chemotherapeutic doxorubicin was loaded into this delivery vehicle,
and rapid release of doxorubicin occurred upon NIR exposure. Further,
colon carcinoma cells exposed to the irradiated platform displayed
nearly 3 times as much doxorubicin uptake as cells exposed to nonirradiated
particles or free drug, which in turn resulted in a higher loss of
cell viability. We hypothesize these effects are because the NIR-mediated
heating results in a transient increase in cell membrane permeability,
thus aiding in cellular uptake of the drug.
Collapse
Affiliation(s)
- Laura E Strong
- Department of Biomedical Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Jennifer L West
- Department of Biomedical Engineering, Duke University , Durham, North Carolina 27708, United States
| |
Collapse
|
99932
|
Liu Y, Soer WJ, Scheerder J, Satgurunathan G, Keddie JL. Water Vapor Sorption and Diffusion in Secondary Dispersion Barrier Coatings: A Critical Comparison with Emulsion Polymers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12147-12157. [PMID: 25985183 DOI: 10.1021/acsami.5b02446] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The conventional method for synthesizing waterborne polymer colloids is emulsion polymerization using surfactants. An emerging method is the use of secondary dispersions (SD) of polymers in water, which avoids the addition of any surfactant. Although there are numerous studies of the water barrier properties (sorption, diffusion, and permeability) of waterborne emulsion (Em) polymer coatings, the properties of SD coatings, in comparison, have not been thoroughly investigated. Here, dynamic water vapor sorption analysis is used to compare the equilibrium sorption isotherms of the two forms of styrene-acrylate copolymers (Em and SD) with the same monomer composition. From an analysis of the kinetics of vapor sorption, the diffusion coefficient of water in the polymer coatings is determined. The combined effects of particle boundaries and surfactant addition were investigated through a comparison of the properties of SD and Em coatings to those of (1) solvent-cast polymer coatings (of the same monomer composition), (2) Em polymers that underwent dialysis to partially remove the water-soluble species, and (3) SD polymers with added surfactants. The results reveal that both the particle boundaries and the surfactants increase vapor sorption. The diffusion coefficients of water are comparable in magnitude in all of the polymer systems but are inversely related to water activity because of molecular clustering. Compared to all of the other waterborne polymer systems, the SD barrier coatings show the lowest equilibrium vapor sorption and permeability coefficients at high relative humidities as well as the lowest water diffusion coefficient at low humidities. These barrier properties make SD coatings an attractive alternative to conventional emulsion polymer coatings.
Collapse
Affiliation(s)
- Yang Liu
- †Department of Physics, University of Surrey, Guildford GU2 7XH, U.K
| | - Willem-Jan Soer
- ‡DSM Coating Resins B.V. Sluisweg 12, Waalwijk 5145 PE, Netherlands
| | - Jürgen Scheerder
- ‡DSM Coating Resins B.V. Sluisweg 12, Waalwijk 5145 PE, Netherlands
| | | | - Joseph L Keddie
- †Department of Physics, University of Surrey, Guildford GU2 7XH, U.K
| |
Collapse
|
99933
|
Wang S, Robertson ML. Thermodynamic Interactions between Polystyrene and Long-Chain Poly(n-Alkyl Acrylates) Derived from Plant Oils. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12109-12118. [PMID: 26020581 DOI: 10.1021/acsami.5b02326] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Vegetable oils and their fatty acids are promising sources for the derivation of polymers. Long-chain poly(n-alkyl acrylates) and poly(n-alkyl methacrylates) are readily derived from fatty acids through conversion of the carboxylic acid end-group to an acrylate or methacrylate group. The resulting polymers contain long alkyl side-chains with around 10-22 carbon atoms. Regardless of the monomer source, the presence of alkyl side-chains in poly(n-alkyl acrylates) and poly(n-alkyl methacrylates) provides a convenient mechanism for tuning their physical properties. The development of structured multicomponent materials, including block copolymers and blends, containing poly(n-alkyl acrylates) and poly(n-alkyl methacrylates) requires knowledge of the thermodynamic interactions governing their self-assembly, typically described by the Flory-Huggins interaction parameter χ. We have investigated the χ parameter between polystyrene and long-chain poly(n-alkyl acrylate) homopolymers and copolymers: specifically we have included poly(stearyl acrylate), poly(lauryl acrylate), and their random copolymers. Lauryl and stearyl acrylate were chosen as model alkyl acrylates derived from vegetable oils and have alkyl side-chain lengths of 12 and 18 carbon atoms, respectively. Polystyrene is included in this study as a model petroleum-sourced polymer, which has wide applicability in commercially relevant multicomponent polymeric materials. Two independent methods were employed to measure the χ parameter: cloud point measurements on binary blends and characterization of the order-disorder transition of triblock copolymers, which were in relatively good agreement with one another. The χ parameter was found to be independent of the alkyl side-chain length (n) for large values of n (i.e., n > 10). This behavior is in stark contrast to the n-dependence of the χ parameter predicted from solubility parameter theory. Our study complements prior work investigating the interactions between polystyrene and short-chain polyacrylates (n ≤ 10). To our knowledge, this is the first study to explore the thermodynamic interactions between polystyrene and long-chain poly(n-alkyl acrylates) with n > 10. This work lays the groundwork for the development of multicomponent structured systems (i.e., blends and copolymers) in this class of sustainable materials.
Collapse
Affiliation(s)
- Shu Wang
- Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, S222 Engineering Building 1, Houston, Texas 77204-4004, United States
| | - Megan L Robertson
- Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, S222 Engineering Building 1, Houston, Texas 77204-4004, United States
| |
Collapse
|
99934
|
Shi Y, Graff RW, Cao X, Wang X, Gao H. Chain-Growth Click Polymerization of AB2Monomers for the Formation of Hyperbranched Polymers with Low Polydispersities in a One-Pot Process. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502578] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
99935
|
Schusser S, Krischer M, Bäcker M, Poghossian A, Wagner P, Schöning MJ. Monitoring of the Enzymatically Catalyzed Degradation of Biodegradable Polymers by Means of Capacitive Field-Effect Sensors. Anal Chem 2015; 87:6607-13. [PMID: 26016927 DOI: 10.1021/acs.analchem.5b00617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Designing novel or optimizing existing biodegradable polymers for biomedical applications requires numerous tests on the effect of substances on the degradation process. In the present work, polymer-modified electrolyte-insulator-semiconductor (PMEIS) sensors have been applied for monitoring an enzymatically catalyzed degradation of polymers for the first time. The thin films of biodegradable polymer poly(D,L-lactic acid) and enzyme lipase were used as a model system. During degradation, the sensors were read-out by means of impedance spectroscopy. In order to interpret the data obtained from impedance measurements, an electrical equivalent circuit model was developed. In addition, morphological investigations of the polymer surface have been performed by means of in situ atomic force microscopy. The sensor signal change, which reflects the progress of degradation, indicates an accelerated degradation in the presence of the enzyme compared to hydrolysis in neutral pH buffer media. The degradation rate increases with increasing enzyme concentration. The obtained results demonstrate the potential of PMEIS sensors as a very promising tool for in situ and real-time monitoring of degradation of polymers.
Collapse
Affiliation(s)
- Sebastian Schusser
- †Institute of Nano- and Biotechnologies (INB), FH Aachen, Jülich, Germany.,‡Peter Grünberg Institute (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany
| | | | - Matthias Bäcker
- †Institute of Nano- and Biotechnologies (INB), FH Aachen, Jülich, Germany.,‡Peter Grünberg Institute (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Arshak Poghossian
- †Institute of Nano- and Biotechnologies (INB), FH Aachen, Jülich, Germany.,‡Peter Grünberg Institute (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Patrick Wagner
- §Department of Physics and Astronomy, Catholic University Leuven, Leuven, Belgium.,∥Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium
| | - Michael J Schöning
- †Institute of Nano- and Biotechnologies (INB), FH Aachen, Jülich, Germany.,‡Peter Grünberg Institute (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany
| |
Collapse
|
99936
|
Affiliation(s)
- Preeti Kumari
- Department of Pharmacy, Birla Institute of Technology and Science – Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
| | - Balaram Ghosh
- Department of Pharmacy, Birla Institute of Technology and Science – Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
| | - Swati Biswas
- Department of Pharmacy, Birla Institute of Technology and Science – Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
| |
Collapse
|
99937
|
Shi Y, Graff RW, Cao X, Wang X, Gao H. Chain-Growth Click Polymerization of AB2Monomers for the Formation of Hyperbranched Polymers with Low Polydispersities in a One-Pot Process. Angew Chem Int Ed Engl 2015; 54:7631-5. [DOI: 10.1002/anie.201502578] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 04/16/2015] [Indexed: 12/27/2022]
|
99938
|
Palumbiny CM, Liu F, Russell TP, Hexemer A, Wang C, Müller-Buschbaum P. The Crystallization of PEDOT:PSS Polymeric Electrodes Probed In Situ during Printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:3391-3397. [PMID: 25903292 DOI: 10.1002/adma.201500315] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/02/2015] [Indexed: 06/04/2023]
Affiliation(s)
- Claudia M Palumbiny
- Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Str., 1, 85748, Garching, Germany
| | - Feng Liu
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Thomas P Russell
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Alexander Hexemer
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Cheng Wang
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Peter Müller-Buschbaum
- Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Str., 1, 85748, Garching, Germany
| |
Collapse
|
99939
|
Hiller W, Engelhardt N, Kampmann AL, Degen P, Weberskirch R. Micellization and Mobility of Amphiphilic Poly(2-oxazoline) Based Block Copolymers Characterized by 1H NMR Spectroscopy. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00149] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wolf Hiller
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Nadine Engelhardt
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Anne-Larissa Kampmann
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| | - Patrick Degen
- Center
for Synchrotron Radiation (DELTA), TU Dortmund, Maria-Goeppert-Meyer-Str. 2, D-44227 Dortmund, Germany
| | - Ralf Weberskirch
- Faculty
of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Straße 6, D-44227 Dortmund, Germany
| |
Collapse
|
99940
|
Sun Q, Seung W, Kim BJ, Seo S, Kim SW, Cho JH. Active Matrix Electronic Skin Strain Sensor Based on Piezopotential-Powered Graphene Transistors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:3411-7. [PMID: 25914310 DOI: 10.1002/adma.201500582] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 03/20/2015] [Indexed: 05/19/2023]
Affiliation(s)
- Qijun Sun
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 440-746, South Korea
| | - Wanchul Seung
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea
| | - Beom Joon Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 440-746, South Korea
| | - Soonmin Seo
- College of BioNano Technology, Gachon University, Seongnam, 461-701, South Korea
| | - Sang-Woo Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 440-746, South Korea
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea
| | - Jeong Ho Cho
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 440-746, South Korea
- School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea
| |
Collapse
|
99941
|
Elliott WH, Bonani W, Maniglio D, Motta A, Tan W, Migliaresi C. Silk Hydrogels of Tunable Structure and Viscoelastic Properties Using Different Chronological Orders of Genipin and Physical Cross-Linking. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12099-12108. [PMID: 25978549 PMCID: PMC4872633 DOI: 10.1021/acsami.5b02308] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Catering the hydrogel manufacturing process toward defined viscoelastic properties for intended biomedical use is important to hydrogel scaffolding function and cell differentiation. Silk fibroin hydrogels may undergo "physical" cross-linking through β-sheet crystallization during high pressure carbon dioxide treatment, or covalent "chemical" cross-linking by genipin. We demonstrate here that time-dependent mechanical properties are tunable in silk fibroin hydrogels by altering the chronological order of genipin cross-linking with β-sheet formation. Genipin cross-linking before β-sheet formation affects gelation mechanics through increased molecular weight, affecting gel morphology, and decreasing stiffness response. Alternately, genipin cross-linking after gelation anchored amorphous regions of the protein chain, and increasing stiffness. These differences are highlighted and validated through large amplitude oscillatory strain near physiologic levels, after incorporation of material characterization at molecular and micron length scales.
Collapse
Affiliation(s)
- Winston H. Elliott
- Department of Industrial Engineering and BIOtech Research Centre, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- Department of Mechanical Engineering, University of Colorado, 1111 Engineering Drive, 427 UCB, Boulder, Colorado 80309, United States
| | - Walter Bonani
- Department of Industrial Engineering and BIOtech Research Centre, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, and INSTM Trento Research Unit, 38123 Trento, Italy
| | - Devid Maniglio
- Department of Industrial Engineering and BIOtech Research Centre, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, and INSTM Trento Research Unit, 38123 Trento, Italy
| | - Antonella Motta
- Department of Industrial Engineering and BIOtech Research Centre, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, and INSTM Trento Research Unit, 38123 Trento, Italy
| | - Wei Tan
- Department of Mechanical Engineering, University of Colorado, 1111 Engineering Drive, 427 UCB, Boulder, Colorado 80309, United States
| | - Claudio Migliaresi
- Department of Industrial Engineering and BIOtech Research Centre, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, and INSTM Trento Research Unit, 38123 Trento, Italy
| |
Collapse
|
99942
|
Nanocomposites Based on Thermoplastic Polymers and Functional Nanofiller for Sensor Applications. MATERIALS 2015. [PMCID: PMC5455710 DOI: 10.3390/ma8063377] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Thermoplastic polymers like polyolefins, polyesters, polyamide, and styrene polymers are the most representative commodity plastics thanks to their cost-efficient manufacturing processes, excellent thermomechanical properties and their good environmental compatibility, including easy recycling. In the last few decades much effort has been devoted worldwide to extend the applications of such materials by conferring on them new properties through mixing and blending with different additives. In this latter context, nanocomposites have recently offered new exciting possibilities. This review discusses the successful use of nanostructured dispersed substrates in designing new stimuli-responsive nanocomposites; in particular, it provides an updated description of the synthetic routes to prepare nanostructured systems having the typical properties of thermoplastic polymers (continuous matrix), but showing enhanced optical, conductive, and thermal features dependent on the dispersion topology. The controlled nanodispersion of functional labeled clays, noble metal nanoparticles and carbon nanotubes is here evidenced to play a key role in producing hybrid thermoplastic materials that have been used in the design of devices, such as NLO devices, chemiresistors, temperature and deformation sensors.
Collapse
|
99943
|
Tanguy NR, Fiddes LK, Yan N. Enhanced Radio Frequency Biosensor for Food Quality Detection Using Functionalized Carbon Nanofillers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11939-11947. [PMID: 25993041 DOI: 10.1021/acsami.5b01876] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper outlines an improved design of inexpensive, wireless and battery free biosensors for in situ monitoring of food quality. This type of device has an additional advantage of being operated remotely. To make the device, a portion of an antenna of a passive 13.56 MHz radio frequency identification (RFID) tag was altered with a sensing element composed of conductive nanofillers/particles, a binding agent, and a polymer matrix. These novel RFID tags were exposed to biogenic amine putrescine, commonly used as a marker for food spoilage, and their response was monitored over time using a general-purpose network analyzer. The effect of conductive filler properties, including conductivity and morphology, and filler functionalization was investigated by preparing sensing composites containing carbon particles (CPs), multiwall carbon nanotubes (MWCNTs), and binding agent grafted-multiwall carbon nanotubes (g-MWCNTs), respectively. During exposure to putrescine, the amount of reflected waves, frequency at resonance, and quality factor of the novel RFID tags decreased in response. The use of MWCNTs reduced tag cutoff time (i.e., faster response time) as compared with the use of CPs, which highlighted the effectiveness of the conductive nanofiller morphology, while the addition of g-MWCNTs further accelerated the sensor response time as a result of localized binding on the conductive nanofiller surface. Microstructural investigation of the film morphology indicated a better dispersion of g-MWCNTs in the sensing composite as compared to MWCNTs and CPs, as well as a smoother texture of the surface of the resulting coating. These results demonstrated that grafting of the binding agent onto the conductive particles in the sensing composite is an effective way to further enhance the detection sensitivity of the RFID tag based sensor.
Collapse
Affiliation(s)
- Nicolas R Tanguy
- †Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, Ontario M5S 3B3, Canada
| | - Lindsey K Fiddes
- ‡Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8 Canada
| | - Ning Yan
- †Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, Ontario M5S 3B3, Canada
- §Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5 Canada
| |
Collapse
|
99944
|
Yang YY, Hu H, Wang X, Yang F, Shen H, Xu FJ, Wu DC. Acid-Labile Poly(glycidyl methacrylate)-Based Star Gene Vectors. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12238-12248. [PMID: 25993557 DOI: 10.1021/acsami.5b02733] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
It was recently reported that ethanolamine-functionalized poly(glycidyl methacrylate) (PGEA) possesses great potential applications in gene therapy due to its good biocompatibility and high transfection efficiency. Importing responsivity into PGEA vectors would further improve their performances. Herein, a series of responsive star-shaped vectors, acetaled β-cyclodextrin-PGEAs (A-CD-PGEAs) consisting of a β-CD core and five PGEA arms linked by acid-labile acetal groups, were proposed and characterized as therapeutic pDNA vectors. The A-CD-PGEAs owned abundant hydroxyl groups to shield extra positive charges of A-CD-PGEAs/pDNA complexes, and the star structure could decrease charge density. The incorporation of acetal linkers endowed A-CD-PGEAs with pH responsivity and degradation. In weakly acidic endosome, the broken acetal linkers resulted in decomposition of A-CD-PGEAs and morphological transformation of A-CD-PGEAs/pDNA complexes, lowering cytotoxicity and accelerating release of pDNA. In comparison with control CD-PGEAs without acetal linkers, A-CD-PGEAs exhibited significantly better transfection performances.
Collapse
Affiliation(s)
- Yan-Yu Yang
- ‡Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029 China
- §Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029 China
| | - Hao Hu
- ‡Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029 China
- §Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029 China
| | | | | | | | - Fu-Jian Xu
- ‡Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029 China
- §Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029 China
| | | |
Collapse
|
99945
|
Li G, Yan Q, Xia H, Zhao Y. Therapeutic-Ultrasound-Triggered Shape Memory of a Melamine-Enhanced Poly(vinyl alcohol) Physical Hydrogel. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12067-73. [PMID: 25985115 DOI: 10.1021/acsami.5b02234] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Therapeutic-ultrasound-triggered shape memory was demonstrated for the first time with a melamine-enhanced poly(vinyl alcohol) (PVA) physical hydrogel. The addition of a small amount of melamine (up to 1.5 wt %) in PVA results in a strong hydrogel due to the multiple H-bonding between the two constituents. A temporary shape of the hydrogel can be obtained by deformation of the hydrogel (∼65 wt % water) at room temperature, followed by fixation of the deformation by freezing/thawing the hydrogel under strain, which induces crystallization of PVA. We show that the ultrasound delivered by a commercially available device designed for the patient's pain relief could trigger the shape recovery process as a result of ultrasound-induced local heating in the hydrogel that melts the crystallized PVA cross-linking. This hydrogel is thus interesting for potential applications because it combines many desirable properties, being mechanically strong, biocompatible, and self-healable and displaying the shape memory capability triggered by a physiological stimulus.
Collapse
Affiliation(s)
- Guo Li
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
- ‡State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Qiang Yan
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Hesheng Xia
- ‡State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Yue Zhao
- †Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| |
Collapse
|
99946
|
Tran BN, Bui QT, Jeon YS, Park HS, Kim JH. Preparation and characterization of CO2-responsive poly(amino acid) derivatives with guanidine group. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1425-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
99947
|
|
99948
|
Gomez JC, Edgar JM, Agbay AM, Bibault E, Montgomery A, Mohtaram NK, Willerth SM. Incorporation of Retinoic Acid Releasing Microspheres into Pluripotent Stem Cell Aggregates for Inducing Neuronal Differentiation. Cell Mol Bioeng 2015. [DOI: 10.1007/s12195-015-0401-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
99949
|
Todorova E, Chernev G, Okolie N, Salvado IM. Structure and properties of innovative silica hybrid materials synthesized for environmental applications. BIOTECHNOL BIOTEC EQ 2015. [DOI: 10.1080/13102818.2015.1047231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
99950
|
Shi X, Zhan W, Chen G, Yu Q, Liu Q, Du H, Cao L, Liu X, Yuan L, Chen H. Regulation of Protein Binding Capability of Surfaces via Host-Guest Interactions: Effects of Localized and Average Ligand Density. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6172-6178. [PMID: 25986051 DOI: 10.1021/acs.langmuir.5b01380] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The protein binding capability of biomaterial surfaces can significantly affect subsequent biological responses, and appropriate ligand presentation is often required to guarantee the best functions. Herein, a new facile method for regulating this capability by varying the localized and average ligand density is presented. Binding between lysine and plasminogen relevant to a fibrinolysis system was chosen as a model. We integrated different lysine-modified β-cyclodextrin (β-CD) derivatives onto bioinert copolymer brushes via host-guest interactions. The localized and average lysine density can be conveniently modulated by changing the lysine valency on β-CD scaffolds and by diluting lysine-persubstituted β-CD with pure β-CD, respectively. Both the plasminogen adsorption and the plasminogen binding affinity were enhanced by lysine-persubstituted β-CD compared with those of lysine-monosubstituted β-CD, which is possibly due to the higher localized lysine density and the multivalent binding of plasminogen on lysine-persubstituted β-CD surfaces. With a change in the ratio of lysine-persubstituted β-CD to β-CD, the average lysine density can be tuned, leading to the linear regulation of the adsorption of plasminogen on surfaces.
Collapse
Affiliation(s)
- Xiujuan Shi
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Wenjun Zhan
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Gaojian Chen
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
- ‡Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, P. R. China
| | - Qian Yu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Qi Liu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hui Du
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Limin Cao
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaoli Liu
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Lin Yuan
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hong Chen
- †College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| |
Collapse
|