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Cui F, Shen S, Ma X, Fan D. Light-Operated Transient Unilateral Adhesive Hydrogel for Comprehensive Prevention of Postoperative Adhesions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2403626. [PMID: 38924679 PMCID: PMC11348232 DOI: 10.1002/advs.202403626] [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: 04/07/2024] [Revised: 06/03/2024] [Indexed: 06/28/2024]
Abstract
Dislocation of anti-adhesion materials, non-specific tissue adhesion, and the induction of secondary fibrinolysis disorders are the main challenges faced by postoperative anti-adhesion materials. Herein, a self-leveling transient unilateral adhesive hydrogel is custom-designed to conquer these challenges with a theoretically calculated and dual-step tailored gellan gum (GG) as the sole agent. First, the maximum gelation temperature of GG is lowered from 42-25 °C through controlled perturbation of intra- and inter-molecular hydrogen bonds, which is achieved by employing the methacrylic anhydride as a "hydrogen bond's perturbator" to form methacrylate GG (MeGG). Second, the "self-leveling" injectability and wound shape adaptably are endowed by the formation of borate-diol complexed MeGG (BMeGG). Finally, the transient unilateral tissue-adhesive hydrogel (BMeGG-H) barrier is prepared through photo-controlled cross-linking of reactive alkenyl groups. This degradable hydrogel demonstrates favorable rheological properties, light-controlled unilateral adhesion properties, biocompatibility, anti-fibrin adhesion, and anti-cell adhesion properties in vitro. Comprehensive regulation of the fibrinolysis balance toward non-adhesion is conformed in a rat model after intra-abdominal surgery via anti-autoinflammatory response, intestinal wall integrity repair, and Tissue plasminogen activator (t-PA) and plasminogen activator inhibitor-1 (PAI-1) balance adjustment. Notably, the 14th day anti-adhesion effective rate is 100%, indicating its significant potential in clinical applications for postoperative anti-adhesion.
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Affiliation(s)
- Furong Cui
- Engineering Research Center of Western Resource Innovation Medicine Green ManufacturingMinistry of EducationSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Shaanxi Key Laboratory of Degradable Biomedical Materials and Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Biotech. & Biomed. Research InstituteNorthwest UniversityXi'an710069China
| | - Shihong Shen
- Engineering Research Center of Western Resource Innovation Medicine Green ManufacturingMinistry of EducationSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Shaanxi Key Laboratory of Degradable Biomedical Materials and Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Biotech. & Biomed. Research InstituteNorthwest UniversityXi'an710069China
| | - Xiaoxuan Ma
- Engineering Research Center of Western Resource Innovation Medicine Green ManufacturingMinistry of EducationSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Shaanxi Key Laboratory of Degradable Biomedical Materials and Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Biotech. & Biomed. Research InstituteNorthwest UniversityXi'an710069China
| | - Daidi Fan
- Engineering Research Center of Western Resource Innovation Medicine Green ManufacturingMinistry of EducationSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Shaanxi Key Laboratory of Degradable Biomedical Materials and Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi'an710069China
- Biotech. & Biomed. Research InstituteNorthwest UniversityXi'an710069China
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2
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Filipecka-Szymczyk K, Makowska-Janusik M, Marczak W. Molecular Dynamics Simulation of Hydrogels Based on Phosphorylcholine-Containing Copolymers for Soft Contact Lens Applications. Molecules 2023; 28:6562. [PMID: 37764338 PMCID: PMC10535866 DOI: 10.3390/molecules28186562] [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: 08/18/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
The structure and dynamics of copolymers of 2-hydroxyethyl methacrylate (HEMA) with 2-methacryloyloxyethyl phosphorylcholine (MPC) were studied by molecular dynamics simulations. In total, 20 systems were analyzed. They differed in numerical fractions of the MPC in the copolymer chain, equal to 0.26 and 0.74, in the sequence of mers, block and random, and the water content, from 0 to 60% by mass. HEMA side chains proved relatively rigid and stable in all considered configurations. MPC side chains, in contrast, were mobile and flexible. Water substantially influenced their dynamics. The copolymer swelling caused by water resulted in diffusion channels, pronounced in highly hydrated systems. Water in the hydrates existed in two states: those that bond to the polymer chain and the free one; the latter was similar to bulk water but with a lower self-diffusion coefficient. The results proved that molecular dynamics simulations could facilitate the preliminary selection of the polymer materials for specific purposes before their synthesis.
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Affiliation(s)
| | | | - Wojciech Marczak
- Faculty of Science and Technology, Jan Dlugosz University, Al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland; (K.F.-S.); (M.M.-J.)
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3
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Lyu J, Zhou Q, Wang H, Xiao Q, Qiang Z, Li X, Wen J, Ye C, Zhu M. Mechanically Strong, Freeze-Resistant, and Ionically Conductive Organohydrogels for Flexible Strain Sensors and Batteries. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206591. [PMID: 36658775 PMCID: PMC10037987 DOI: 10.1002/advs.202206591] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Conductive hydrogels as promising material candidates for soft electronics have been rapidly developed in recent years. However, the low ionic conductivity, limited mechanical properties, and insufficient freeze-resistance greatly limit their applications for flexible and wearable electronics. Herein, aramid nanofiber (ANF)-reinforced poly(vinyl alcohol) (PVA) organohydrogels containing dimethyl sulfoxide (DMSO)/H2 O mixed solvents with outstanding freeze-resistance are fabricated through solution casting and 3D printing methods. The organohydrogels show both high tensile strength and toughness due to the synergistic effect of ANFs and DMSO in the system, which promotes PVA crystallization and intermolecular hydrogen bonding interactions between PVA molecules as well as ANFs and PVA, confirmed by a suite of characterization and molecular dynamics simulations. The organohydrogels also exhibit ultrahigh ionic conductivity, ranging from 1.1 to 34.3 S m-1 at -50 to 60 °C. Building on these excellent material properties, the organohydrogel-based strain sensors and solid-state zinc-air batteries (ZABs) are fabricated, which have a broad working temperature range. Particularly, the ZABs not only exhibit high specific capacity (262 mAh g-1 ) with ultra-long cycling life (355 cycles, 118 h) even at -30 °C, but also can work properly under various deformation states, manifesting their great potential applications in soft robotics and wearable electronics.
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Affiliation(s)
- Jiayu Lyu
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Qingya Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Haifeng Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Qi Xiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Zhe Qiang
- School of Polymer Science and EngineeringThe University of Southern MississippiHattiesburgMS39406USA
| | - Xiaopeng Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Jin Wen
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Changhuai Ye
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
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4
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Kumar R, Parashar A. Atomistic simulations of pristine and nanoparticle reinforced hydrogels: A review. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2023. [DOI: 10.1002/wcms.1655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Raju Kumar
- Department of Mechanical and Industrial Engineering Indian Institute of Technology Roorkee Uttarakhand India
| | - Avinash Parashar
- Department of Mechanical and Industrial Engineering Indian Institute of Technology Roorkee Uttarakhand India
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5
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Scherillo G, Mensitieri G, Baldanza A, Loianno V, Musto P, Pannico M, Correa A, De Nicola A, Milano G. Weak Interactions between Poly(ether imide) and Carbon Dioxide: A Multiscale Investigation Combining Experiments, Theory, and Simulations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Giuseppe Scherillo
- Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
| | - Giuseppe Mensitieri
- Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
| | - Antonio Baldanza
- Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
| | - Valerio Loianno
- Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
| | - Pellegrino Musto
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei, 34, 80078Pozzuoli (NA), Italy
| | - Marianna Pannico
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegrei, 34, 80078Pozzuoli (NA), Italy
| | - Andrea Correa
- Department of Chemical Science, University of Naples Federico II, Via Cintia 21, 80126Napoli, Italy
| | - Antonio De Nicola
- Scuola Superiore Meridionale, Via largo San Marcellino 10, 80138Napoli, Italy
| | - Giuseppe Milano
- Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
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A Molecular Description of Hydrogel Forming Polymers for Cement-Based Printing Paste Applications. Gels 2022; 8:gels8090592. [PMID: 36135304 PMCID: PMC9498349 DOI: 10.3390/gels8090592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
This research endeavors to link the physical and chemical characteristics of select polymer hydrogels to differences in printability when used as printing aids in cement-based printing pastes. A variety of experimental probes including differential scanning calorimetry (DSC), NMR-diffusion ordered spectroscopy (DOSY), quasi-elastic neutron scattering (QENS) using neutron backscattering spectroscopy, and X-ray powder diffraction (XRD), along with molecular dynamic simulations, were used. Conjectures based on objective measures of printability and physical and chemical-molecular characteristics of the polymer gels are emerging that should help target printing aid selection and design, and mix formulation. Molecular simulations were shown to link higher hydrogen bond probability and larger radius of gyration to higher viscosity gels. Furthermore, the higher viscosity gels also produced higher elastic properties, as measured by neutron backscattering spectroscopy.
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Peng K, Shahab S, Mirzaeifar R. Interaction of high-intensity focused ultrasound with polymers at the atomistic scale. NANOTECHNOLOGY 2021; 32:045707. [PMID: 33036012 DOI: 10.1088/1361-6528/abbfd2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Experiments show that high-intensity focused ultrasound (HIFU) is a promising stimulus with multiple superior and unique capabilities to induce localized heating and achieve temporal and spatial thermal effects in the polymers, noninvasively. When polymers are subjected to HIFU, they heat up differently compared to the case they are subjected to heat sources directly; however, the origins of this difference are still entirely unknown. We hypothesize that the difference in the macroscale response of polymers subjected to HIFU strongly depends on the polymer chains, composition, and structure, i.e. being crystalline or amorphous. In this work, this hypothesis is investigated by molecular dynamics studies at the atomistic level and verified by experiments at the macroscopic scale. The results show that the viscoelasticity, measured by stress-strain phase lag, the reptation motion of the chains, and the vibration-induced local mobility quantified by the root mean square fluctuation contribute to the observed difference in the HIFU-induced thermal effects. This unravels the unknown mechanisms behind stimulating the polymers by HIFU, and paves the way in front of using this method in future applications.
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Affiliation(s)
- Kaiyuan Peng
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States of America
| | - Shima Shahab
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States of America
| | - Reza Mirzaeifar
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States of America
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8
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Li L, Xu X, Liu L, Song P, Cao Q, Xu Z, Fang Z, Wang H. Water governs the mechanical properties of poly(vinyl alcohol). POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123330] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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9
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Lutzweiler G, Ndreu Halili A, Engin Vrana N. The Overview of Porous, Bioactive Scaffolds as Instructive Biomaterials for Tissue Regeneration and Their Clinical Translation. Pharmaceutics 2020; 12:E602. [PMID: 32610440 PMCID: PMC7407612 DOI: 10.3390/pharmaceutics12070602] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/08/2020] [Accepted: 06/23/2020] [Indexed: 12/20/2022] Open
Abstract
Porous scaffolds have been employed for decades in the biomedical field where researchers have been seeking to produce an environment which could approach one of the extracellular matrixes supporting cells in natural tissues. Such three-dimensional systems offer many degrees of freedom to modulate cell activity, ranging from the chemistry of the structure and the architectural properties such as the porosity, the pore, and interconnection size. All these features can be exploited synergistically to tailor the cell-material interactions, and further, the tissue growth within the voids of the scaffold. Herein, an overview of the materials employed to generate porous scaffolds as well as the various techniques that are used to process them is supplied. Furthermore, scaffold parameters which modulate cell behavior are identified under distinct aspects: the architecture of inert scaffolds (i.e., pore and interconnection size, porosity, mechanical properties, etc.) alone on cell functions followed by comparison with bioactive scaffolds to grasp the most relevant features driving tissue regeneration. Finally, in vivo outcomes are highlighted comparing the accordance between in vitro and in vivo results in order to tackle the future translational challenges in tissue repair and regeneration.
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Affiliation(s)
- Gaëtan Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121, 11 rue Humann, 67085 Strasbourg CEDEX, France
| | - Albana Ndreu Halili
- Department of Information Technology, Aleksander Moisiu University, 2001 Durres, Albania;
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10
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Luo K, Wangari C, Subhash G, Spearot DE. Effect of Loop Defects on the High Strain Rate Behavior of PEGDA Hydrogels: A Molecular Dynamics Study. J Phys Chem B 2020; 124:2029-2039. [DOI: 10.1021/acs.jpcb.9b11378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Casalini T, Perale G. From Microscale to Macroscale: Nine Orders of Magnitude for a Comprehensive Modeling of Hydrogels for Controlled Drug Delivery. Gels 2019; 5:E28. [PMID: 31096685 PMCID: PMC6631542 DOI: 10.3390/gels5020028] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/14/2019] [Accepted: 05/06/2019] [Indexed: 12/21/2022] Open
Abstract
Because of their inherent biocompatibility and tailorable network design, hydrogels meet an increasing interest as biomaterials for the fabrication of controlled drug delivery devices. In this regard, mathematical modeling can highlight release mechanisms and governing phenomena, thus gaining a key role as complementary tool for experimental activity. Starting from the seminal contribution given by Flory-Rehner equation back in 1943 for the determination of matrix structural properties, over more than 70 years, hydrogel modeling has not only taken advantage of new theories and the increasing computational power, but also of the methods offered by computational chemistry, which provide details at the fundamental molecular level. Simulation techniques such as molecular dynamics act as a "computational microscope" and allow for obtaining a new and deeper understanding of the specific interactions between the solute and the polymer, opening new exciting possibilities for an in silico network design at the molecular scale. Moreover, system modeling constitutes an essential step within the "safety by design" paradigm that is becoming one of the new regulatory standard requirements also in the field-controlled release devices. This review aims at providing a summary of the most frequently used modeling approaches (molecular dynamics, coarse-grained models, Brownian dynamics, dissipative particle dynamics, Monte Carlo simulations, and mass conservation equations), which are here classified according to the characteristic length scale. The outcomes and the opportunities of each approach are compared and discussed with selected examples from literature.
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Affiliation(s)
- Tommaso Casalini
- Biomaterials Laboratory, Institute for Mechanical Engineering and Materials Technology, SUPSI-University of Applied Sciences and Arts of Southern Switzerland, Via Cantonale 2C, Galleria 2, 6928 Manno, Switzerland.
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland.
| | - Giuseppe Perale
- Biomaterials Laboratory, Institute for Mechanical Engineering and Materials Technology, SUPSI-University of Applied Sciences and Arts of Southern Switzerland, Via Cantonale 2C, Galleria 2, 6928 Manno, Switzerland.
- Department of Surgical Sciences and Integrated Diagnostics, Orthopaedic Clinic-IRCCS Ospedale Policlinico San Martino, Faculty of Biomedical Sciences, University of Genova, Largo R. Benzi 10, 16132 Genova, Italy.
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12
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Rukmani SJ, Lin P, Andrew JS, Colina CM. Molecular Modeling of Complex Cross-Linked Networks of PEGDA Nanogels. J Phys Chem B 2019; 123:4129-4138. [PMID: 31038311 DOI: 10.1021/acs.jpcb.9b01622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Poly(ethylene glycol) (PEG)-based nanogels are attractive for biomedical applications due to their biocompatibility, versatile end group chemistry, and ability to sterically shield encapsulated drug molecules. The characteristics of a hydrogel network govern the encapsulation and efficient delivery of drug molecules for a target application. A molecular-level description of network topology can complement experimental investigations to understand its effects on the structural properties of these nanogels. In this work, atomistic molecular simulations of heterogeneous, nonideal PEG-diacrylate (PEGDA) nanogels are presented. The effects of cross-linking density and topological features on the structural properties of PEGDA nanogels were studied. The average functionality was controlled to systematically study the effect of cross-linking density on the radius of gyration, shape, and mesh size of the nanogels. For a given average functionality, the impact of distinct network topologies on the structural properties was also studied. The aspect ratios, based on the gyration tensor, were calculated to characterize the shapes of these nanogels for different topologies. Nanogel structures with higher cross-linking densities showed a globular shape, while structures with lower cross-linking density showed shape anisotropy. The distribution and connectivity of the cross-linked junctions played a key role in determining the size and shape anisotropy of PEGDA nanogels; the number of unreacted chain ends and their connectivity directly affected the anisotropy. The mesh size, denoted by the limiting "free volume element" present in the nanogel samples, does not show a significant change with increasing average functionality. This work provides insight into the structural properties of heterogeneous hydrogels that aid the design of nonideal nanogel networks for a targeted drug delivery application.
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Mensitieri G, Scherillo G, La Manna P, Musto P. Sorption Thermodynamics of CO₂, H₂O, and CH₃OH in a Glassy Polyetherimide: A Molecular Perspective. MEMBRANES 2019; 9:E23. [PMID: 30717234 PMCID: PMC6409864 DOI: 10.3390/membranes9020023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/18/2019] [Accepted: 01/18/2019] [Indexed: 11/17/2022]
Abstract
In this paper, the sorption thermodynamics of low-molecular-weight penetrants in a glassy polyetherimide, endowed with specific interactions, is addressed by combining an experimental approach based on vibrational spectroscopy with thermodynamics modeling. This modeling approach is based on the extension of equilibrium theories to the out-of-equilibrium glassy state. Specific interactions are accounted for in the framework of a compressible lattice fluid theory. In particular, the sorption of carbon dioxide, water, and methanol is illustrated, exploiting the wealth of information gathered at a molecular level from Fourier-transform infrared (FTIR) spectroscopy to tailor thermodynamics modeling. The investigated penetrants display a different interacting characteristic with respect to the polymer substrate, which reflects itself in the sorption thermodynamics. For the specific case of water, the outcomes from molecular dynamics simulations are compared with the results of the present analysis.
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Affiliation(s)
- Giuseppe Mensitieri
- Department of Chemical, Materials and PrNoduction Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy.
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Viale Campi Flegrei 34, 80078 Pozzuoli (Na), Italy.
| | - Giuseppe Scherillo
- Department of Chemical, Materials and PrNoduction Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy.
| | - Pietro La Manna
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Viale Campi Flegrei 34, 80078 Pozzuoli (Na), Italy.
| | - Pellegrino Musto
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Viale Campi Flegrei 34, 80078 Pozzuoli (Na), Italy.
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Alegre-Requena JV, Saldías C, Inostroza-Rivera R, Díaz Díaz D. Understanding hydrogelation processes through molecular dynamics. J Mater Chem B 2019; 7:1652-1673. [DOI: 10.1039/c8tb03036g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Molecular dynamics (MD) is currently one of the preferred techniques employed to understand hydrogelation processes for its ability to include large amounts of atoms in computational calculations, since substantial amounts of solvent molecules are involved in gel formation.
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Affiliation(s)
| | - César Saldías
- Departamento de Química Física
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Macul
- Chile
| | | | - David Díaz Díaz
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
- Instituto de Productos Naturales y Agrobiología del CSIC
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15
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Aryal D, Ganesan V. Impact of cross-linking of polymers on transport of salt and water in polyelectrolyte membranes: A mesoscopic simulation study. J Chem Phys 2018; 149:224902. [DOI: 10.1063/1.5057708] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Dipak Aryal
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
| | - Venkat Ganesan
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
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16
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Chen S, Yong X. Dissipative particle dynamics modeling of hydrogel swelling by osmotic ensemble method. J Chem Phys 2018; 149:094904. [DOI: 10.1063/1.5045100] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Shensheng Chen
- Department of Mechanical Engineering, Binghamton University, The State University of New York, 4400 Vestal Parkway East, Binghamton, New York 13902, USA
| | - Xin Yong
- Department of Mechanical Engineering, Binghamton University, The State University of New York, 4400 Vestal Parkway East, Binghamton, New York 13902, USA
- Institute for Materials Research, Binghamton University, The State University of New York, 4400 Vestal Parkway East, Binghamton, New York 13902, USA
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17
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Kyrychenko A, Pasko DA, Kalugin ON. Poly(vinyl alcohol) as a water protecting agent for silver nanoparticles: the role of polymer size and structure. Phys Chem Chem Phys 2018; 19:8742-8756. [PMID: 28217797 DOI: 10.1039/c6cp05562a] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical modification of silver nanoparticles (AgNPs) with a stabilizing agent, such as poly(vinyl alcohol) (PVA), plays an important role in shape-controlled seeded-growth and colloidal stability. However, theoretical aspects of the stabilizing mechanism of PVA are still poorly understood. To gain a better understanding of the role of PVA in water protecting effects for silver nanoparticles, we developed an atomistic model of a AgNP grafted with single-chain PVA of various lengths. Our model, designed for classical molecular dynamics (MD) simulations, approximates the AgNP as a quasi-spherical silver nanocrystal with 3.9 nm diameter and uses a united-atom representation for PVA with its polymer chain length varying from 220 up to 1540 repeating units. We found that PVA adsorbs onto the AgNP surface through multiple non-covalent interactions, among which non-covalent bonding of the hydroxyl groups plays a key role. The analysis of adsorption isotherms by using the Hill, Scatchard, and McGhee & von Hippel models exhibits evidence for positive binding cooperativity with the cooperativity parameter varying from 1.55 to 2.12. Our results indicate that the size of the PVA polymer rather than its structure plays a crucial role in providing water protecting effects for the AgNP core, varying from 40% up to 91%. The water-protecting efficiency was well approximated by the Langmuir-Freundlich equation, allowing us to predict that the saturated coverage of the nanoparticle of a given diameter of 3.9 nm should occur when the PVA molecular weight approaches 115 kDa, which corresponds to the number of vinyl alcohol monomers being equal to 3100 units.
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Affiliation(s)
- Alexander Kyrychenko
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine. and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
| | - Dmitry A Pasko
- School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
| | - Oleg N Kalugin
- School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
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18
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Karatasos K, Kritikos G. A microscopic view of graphene-oxide/poly(acrylic acid) physical hydrogels: effects of polymer charge and graphene oxide loading. SOFT MATTER 2018; 14:614-627. [PMID: 29265164 DOI: 10.1039/c7sm02305g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work we have examined in detail by means of fully atomistic molecular dynamics simulations, physical hydrogels formed by a polymer electrolyte, poly(acrylic acid), and graphene oxide, at two different charging states of the polymer and two different graphene oxide concentrations. It was found that variations of these parameters incurred drastic changes in general morphological characteristics of the composite materials, the degree of physical adsorption of polyelectrolyte chains onto the graphene oxide surface, the polymer dynamic response at local and global length scales, in the charge distributions around the components, and in the mobility of the counterions. All these microscopic features are expected to significantly affect macroscopic physical properties of the hydrogels, such as their mechanical responses and their electrical behaviors.
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Affiliation(s)
- Kostas Karatasos
- Laboratory of Physical Chemistry, Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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19
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Abstract
An algorithm capable of incorporating multi-step reaction mechanisms into atomistic molecular dynamics (MD) simulations using traditional fixed valence force fields is proposed and implemented within the framework of LAMMPS (Large-scale Atomic Molecular Massively Parallel Simulator). This extension, referred to as fix bond/react, enables bonding topology modifications during a running MD simulation using pre- and post-reaction bonding templates to carry out a pre-specified reaction. Candidate reactants are first identified by interatomic separation, followed by the application of a generalized topology matching algorithm to confirm they match the pre-reaction template. This is followed by a topology conversion to match the post-reaction template and a dynamic relaxation to minimize high energy configurations. Two case studies, the condensation polymerization of nylon 6,6 and the formation of a highly-crosslinked epoxy, are simulated to demonstrate the robustness, stability, and speed of the algorithm. Improvements which could increase its utility are discussed.
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Affiliation(s)
- Jacob R Gissinger
- Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309-0424, USA
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20
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Li X, Jia J, Mei Y, Latour RA. Molecular modeling to predict peptide accessibility for peptide-functionalized hydrogels. Biointerphases 2017; 12:031008. [PMID: 28821213 PMCID: PMC5562506 DOI: 10.1116/1.4992101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 07/28/2017] [Accepted: 08/07/2017] [Indexed: 12/16/2022] Open
Abstract
Peptide-functionalized (PF) hydrogels are being widely investigated by the tissue engineering and regenerative medicine communities for a broad range of applications because of their unique potential to mimic the natural extracellular matrix and promote tissue regeneration. In order for these complex material systems to perform their intended bioactive function (e.g., cell signaling), the peptides that are tethered to the hydrogel matrix must be accessible at the hydrogel surface for cell-receptor binding. The factors influencing the surface accessibility of the tethered peptide mainly include the length of the tethers, the loading (i.e., concentration) of the peptide, and the association between the tethered peptide and the hydrogel matrix. In the present work, the authors developed coarse-grained molecular models based on the all-atom polymer consistent force field for a type of poly(ethylene glycol)-based PF hydrogel and conducted molecular simulations to investigate the distribution of the peptide within the hydrogel and its surface accessibility as a function of tether length and peptide concentration. The calculated results of the effects of these design parameters on the surface accessibility of the peptide agree very well with corresponding experimental measurements in which peptide accessibility was quantified by the number of cells attached to the hydrogel surface per unit area. The developed modeling methods are able to provide unique insights into the molecular behavior of PF hydrogels and the distribution of the tethered peptides, which can serve as a guide for hydrogel design optimization.
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Affiliation(s)
- Xianfeng Li
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Jia Jia
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Ying Mei
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Robert A Latour
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
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21
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Bachl J, Bertran O, Mayr J, Alemán C, Díaz Díaz D. Aromatic ionene topology and counterion-tuned gelation of acidic aqueous solutions. SOFT MATTER 2017; 13:3031-3041. [PMID: 28374877 DOI: 10.1039/c7sm00234c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Unusual gelation of acidic solutions was achieved using polycations bearing quaternary ammonium moieties. These ionene polymers are based on a disubstituted phenylene dibenzamide core, which allows the construction of different topomers (i.e. ortho-1, meta-2 and para-3). The topology of the polymers was found to play a key role on their aggregation behaviour both in pure water and in a variety of aqueous acidic solutions leading to the formation of stable acidic gels. Specifically, ortho-1 showed superior gelation ability than the analogues meta-2 and para-3 in numerous solutions of different pH and ionic strengths. Lower critical gelation concentrations, higher gel-to-sol transition temperatures and faster gelation were usually observed for ortho-1 regardless the solvent system. Detailed computational molecular dynamic simulations revealed a major role of the counterion (Cl-) and specific polymerpolymer interactions. In particular, hydrogen bonds, N-Hπ interactions and intramolecular π-π stacking networks are distinctive in ortho-1. In addition, counterions located at internal hydration regions also affect to such polymerpolymer interactions, acting as binders and, therefore, providing additional stability.
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Affiliation(s)
- Jürgen Bachl
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany.
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22
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de Nicola A, Correa A, Milano G, La Manna P, Musto P, Mensitieri G, Scherillo G. Local Structure and Dynamics of Water Absorbed in Poly(ether imide): A Hydrogen Bonding Anatomy. J Phys Chem B 2017; 121:3162-3176. [PMID: 28335602 DOI: 10.1021/acs.jpcb.7b00992] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogen bonding (HB) interactions play a major role in determining the behavior of macromolecular systems absorbing water. In fact, functional and structural properties of polymer-water mixtures are affected by the amount and type of these interactions. This contribution aims at a molecular level understanding of the interactional scenario for the technologically relevant case of the poly(ether imide)-water system. The problem has been tackled by combining different experimental and theoretical approaches which, taken together, provide a comprehensive physical picture. Relevant experimental data were gathered by in situ FTIR spectroscopy, while molecular dynamics (MD) and statistical thermodynamics approaches were used as modeling theoretical tools. It was found that, among the possible configurations, some are strongly prevailing. In particular, water molecules preferentially establish water bridges with two carbonyl groups of the same PEI repeating unit. Water self-interactions were also detected, giving rise to a "second shell" species in the prevalent form of dimers. The population of the different water species was evaluated spectroscopically, and a remarkable agreement with theoretical predictions was found.
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Affiliation(s)
- Antonio de Nicola
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno , Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy
| | - Andrea Correa
- Department of Chemical Sciences, Federico II University of Naples Via Cintia , Complesso Monte S. Angelo, 80126 Napoli, Italy
| | - Giuseppe Milano
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno , Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy.,Institute on Polymers, Composites and Biomaterials, National Research Council of Italy , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Pietro La Manna
- Institute on Polymers, Composites and Biomaterials, National Research Council of Italy , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Pellegrino Musto
- Institute on Polymers, Composites and Biomaterials, National Research Council of Italy , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Giuseppe Mensitieri
- Institute on Polymers, Composites and Biomaterials, National Research Council of Italy , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy.,Department of Chemical, Materials and Production Engineering, University of Naples Federico II , Piazzale Tecchio 80, 80125 Naples, Italy
| | - Giuseppe Scherillo
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II , Piazzale Tecchio 80, 80125 Naples, Italy
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23
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Xu D, Gersappe D. Structure formation in nanocomposite hydrogels. SOFT MATTER 2017; 13:1853-1861. [PMID: 28177007 DOI: 10.1039/c6sm02543a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We use molecular dynamics simulations to study structure formation in physically associating nanocomposite hydrogels. Nanofillers were modeled as rigid bodies of disk-like shapes and physical crosslinks were simulated by introducing a short-range attraction between the nanofillers and polymer chain ends. The structure, dynamics and mechanics of these polymer gels were studied as a function of nanofiller volume fraction. We observe the formation of a percolated network in the hydrogels, with an ordered local structure but disordered globally, as we increase the filler fraction. This locally ordered structure was a result of the anisotropy of the disk-like fillers. The dynamics of polymers showed significant caging effects in the gel state. Stress autocorrelation and elongation results were analyzed as a function of nano-filler concentrations. Comparisons with nanofillers of different shapes showed that disk-like nanofillers are more effective in strengthening the hydrogels than spherical nanofillers.
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Affiliation(s)
- Di Xu
- Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA.
| | - Dilip Gersappe
- Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA.
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24
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Ponsiglione AM, Russo M, Netti PA, Torino E. Impact of biopolymer matrices on relaxometric properties of contrast agents. Interface Focus 2016; 6:20160061. [PMID: 27920897 PMCID: PMC5071819 DOI: 10.1098/rsfs.2016.0061] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Properties of water molecules at the interface between contrast agents (CAs) for magnetic resonance imaging and macromolecules could have a valuable impact on the effectiveness of metal chelates. Recent studies, indeed, demonstrated that polymer architectures could influence CAs' relaxivity by modifying the correlation times of the metal chelate. However, an understanding of the physico-chemical properties of polymer/CA systems is necessary to improve the efficiency of clinically used CAs, still exhibiting low relaxivity. In this context, we investigate the impact of hyaluronic acid (HA) hydrogels on the relaxometric properties of Gd-DTPA, a clinically used CA, to understand better the determining role of the water, which is crucial for both the relaxation enhancement and the polymer conformation. To this aim, water self-diffusion coefficients, thermodynamic interactions and relaxometric properties of HA/Gd-DTPA solutions are studied through time-domain NMR relaxometry and isothermal titration calorimetry. We observed that the presence of Gd-DTPA could alter the polymer conformation and the behaviour of water molecules at the HA/Gd-DTPA interface, thus modulating the relaxivity of the system. In conclusion, the tunability of hydrogel structures could be exploited to improve magnetic properties of metal chelates, inspiring the development of new CAs as well as metallopolymer complexes with applications as sensors and memory devices.
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Affiliation(s)
- Alfonso Maria Ponsiglione
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
- Center for Advanced Biomaterials for Healthcare IIT@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Naples, Italy
| | - Maria Russo
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
- Center for Advanced Biomaterials for Healthcare IIT@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Naples, Italy
| | - Paolo Antonio Netti
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
- Interdisciplinary Research Center on Biomaterials, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
- Center for Advanced Biomaterials for Healthcare IIT@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Naples, Italy
| | - Enza Torino
- Interdisciplinary Research Center on Biomaterials, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
- Center for Advanced Biomaterials for Healthcare IIT@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Naples, Italy
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25
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Demianenko P, Minisini B, Ortelli G, Lamrani M, Poncin-Epaillard F. Computing thermomechanical properties of dry homopolymers used as raw materials for formulation of biomedical hydrogels. J Mol Model 2016; 22:159. [PMID: 27312711 DOI: 10.1007/s00894-016-3026-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 05/31/2016] [Indexed: 11/25/2022]
Abstract
Different static properties have been calculated with COMPASS force field for polyacrylamide, poly(2-hydroxyethylacrylate) (HEA), poly(2-hydroxyethylmethacrylate) (HEMA), poly(glycidylmethacrylate) (GMA), polyethylene glycol (PEG), and poly(2,2,2-trifluoroethylmethacrylate) (TFEM). For each polymers, the calculated values were averaged on five equilibrated configurations of amorphous cell composed of one atactic chain containing 100 repeat units. The ranking obtained from the densities calculated at 300 K is TFEM > HEA ≈ xpolycrylamide > HEMA ≈ GMA > PEG. Concerning the glass transition temperature we have obtained polyacrylamide > HEMA ≈ GMA ≈ HEA > PEG, and polyacrylamide > HEMA ≈ HEA > GMA ≈ PEG > TFEM for the bulk modulus. The calculated results, when available, have been compared with experimental data coming from literature.
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Affiliation(s)
- Pavlo Demianenko
- ISMANS, Avenue Frédéric Auguste Bartholdi, 72000, Le Mans Cedex, France
- Institut des Molécules et Matériaux du Mans - département Polymères, LUNAM Université, UMR Université du Maine - CNRS n° 6283, Colloïdes et Interfaces, Avenue Olivier Messiaen, 72085, Le Mans Cedex, France
| | - Benoît Minisini
- ISMANS, Avenue Frédéric Auguste Bartholdi, 72000, Le Mans Cedex, France.
| | - Gabriel Ortelli
- ISMANS, Avenue Frédéric Auguste Bartholdi, 72000, Le Mans Cedex, France
| | - Mouad Lamrani
- ISMANS, Avenue Frédéric Auguste Bartholdi, 72000, Le Mans Cedex, France
| | - Fabienne Poncin-Epaillard
- Institut des Molécules et Matériaux du Mans - département Polymères, LUNAM Université, UMR Université du Maine - CNRS n° 6283, Colloïdes et Interfaces, Avenue Olivier Messiaen, 72085, Le Mans Cedex, France
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26
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Borca CH, Arango CA. Molecular Dynamics of a Water-Absorbent Nanoscale Material Based on Chitosan. J Phys Chem B 2016; 120:3754-64. [PMID: 26938052 DOI: 10.1021/acs.jpcb.5b11230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although hydrogels have been widely investigated for their use in materials science, nanotechnology, and novel pharmaceuticals, mechanistic details explaining their water-absorbent features are not well understood. We performed an all-atom molecular dynamics study of the structural transformation of chitosan nanohydrogels due to water absorption. We analyzed the conformation of dry, nanoscaled chitosan, the structural modifications that emerge during the process of water inclusion, and the dynamics of this biopolymer in the presence of nature's solvent. Two sets of nanoscaled, single-chained chitosan models were simulated: one to study the swelling dependence upon the degree of self-cross-linking and other to observe the response with respect to the degree of protonation. We verified that nanohydrogels keep their ability to absorb water and grow, regardless of their degree of cross-linking. Noteworthy, we found that the swelling behavior of nanoscaled chitosan is pH-dependent, and it is considerably more limited than that of larger scale hydrogels. Thus, our study suggests that properties of nanohydrogels are significantly different from those of larger hydrogels. These findings might be important in the design of novel controlled-release and targeted drug-delivery systems based on chitosan.
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Affiliation(s)
- Carlos H Borca
- Departament of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States.,Departamento de Ciencias Químicas, Universidad Icesi , Cali, Valle del Cauca, Colombia
| | - Carlos A Arango
- Departamento de Ciencias Químicas, Universidad Icesi , Cali, Valle del Cauca, Colombia
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27
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Weeber R, Kantorovich S, Holm C. Ferrogels cross-linked by magnetic particles: Field-driven deformation and elasticity studied using computer simulations. J Chem Phys 2016; 143:154901. [PMID: 26493924 DOI: 10.1063/1.4932371] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ferrogels, i.e., swollen polymer networks into which magnetic particles are immersed, can be considered as "smart materials" since their shape and elasticity can be controlled by an external magnetic field. Using molecular dynamics simulations on the coarse-grained level, we study a ferrogel in which the magnetic particles act as the cross-linkers of the polymer network. In a homogeneous external magnetic field, the direct coupling between the orientation of the magnetic moments and the polymers by means of covalent bonds gives rise to a deformation of the gel, independent of the interparticle dipole-dipole interaction. In this paper, we quantify this deformation, and, in particular, we investigate the gel's elastic moduli and its magnetic response for two different connectivities of the network nodes. Our results demonstrate that these properties depend significantly on the topology of the polymer network.
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Affiliation(s)
- Rudolf Weeber
- Institut für Computerphysik, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | | | - Christian Holm
- Institut für Computerphysik, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
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28
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Karatasos K, Kritikos G. Characterization of a graphene oxide/poly(acrylic acid) nanocomposite by means of molecular dynamics simulations. RSC Adv 2016. [DOI: 10.1039/c6ra22951d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Graphene oxide/poly(acrylic acid) nanocomposite: static, dynamic, thermal properties and hydrogen bonding, as studied by molecular dynamics simulations.
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Affiliation(s)
- Kostas Karatasos
- Laboratory of Physical Chemistry
- Department of Chemical Engineering
- Aristotle University of Thessaloniki
- 54124 Thessaloniki
- Greece
| | - Georgios Kritikos
- Laboratory of Physical Chemistry
- Department of Chemical Engineering
- Aristotle University of Thessaloniki
- 54124 Thessaloniki
- Greece
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29
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Salahshoor H, Tootkaboni M, Rahbar N. Nanoscale Structure and Mechanical Properties of Cross-Linked Hydrogels. JOURNAL OF NANOMECHANICS AND MICROMECHANICS 2015. [DOI: 10.1061/(asce)nm.2153-5477.0000091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Hossein Salahshoor
- School of Aerospace Engineering, Georgia Institute of Technology, 270 Ferst Dr., Atlanta, GA 30332-0150; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609
| | - Mazdak Tootkaboni
- Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts Dartmouth, North Dartmouth, MA
| | - Nima Rahbar
- Assistant Professor, Dept. of Civil and Environmental Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609 (corresponding author)
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30
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Noorjahan A, Choi P. Effect of partial atomic charges on the calculated free energy of solvation of poly(vinyl alcohol) in selected solvents. J Mol Model 2015; 21:58. [DOI: 10.1007/s00894-014-2554-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 11/30/2014] [Indexed: 10/23/2022]
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31
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Effect of free volume redistribution on the diffusivity of water and benzene in poly(vinyl alcohol). Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.07.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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32
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Peng L, Zhou T, Huang Y, Jiang L, Dan Y. Microdynamics Mechanism of Thermal-Induced Hydrogel Network Destruction of Poly(vinyl alcohol) in D2O Studied by Two-Dimensional Infrared Correlation Spectroscopy. J Phys Chem B 2014; 118:9496-506. [DOI: 10.1021/jp5054259] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Leilei Peng
- The State Key Laboratory
of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Tao Zhou
- The State Key Laboratory
of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Yun Huang
- The State Key Laboratory
of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Long Jiang
- The State Key Laboratory
of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Yi Dan
- The State Key Laboratory
of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, China
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33
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Tesei G, Paradossi G, Chiessi E. Influence of Surface Concentration on Poly(vinyl alcohol) Behavior at the Water–Vacuum Interface: A Molecular Dynamics Simulation Study. J Phys Chem B 2014; 118:6946-55. [DOI: 10.1021/jp502486a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Giulio Tesei
- Department of Chemical Sciences
and Technologies, University of Rome Tor Vergata, Via della Ricerca
Scientifica I, 00133 Rome, Italy
| | - Gaio Paradossi
- Department of Chemical Sciences
and Technologies, University of Rome Tor Vergata, Via della Ricerca
Scientifica I, 00133 Rome, Italy
| | - Ester Chiessi
- Department of Chemical Sciences
and Technologies, University of Rome Tor Vergata, Via della Ricerca
Scientifica I, 00133 Rome, Italy
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34
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Philipp M, Kyriakos K, Silvi L, Lohstroh W, Petry W, Krüger JK, Papadakis CM, Müller-Buschbaum P. From molecular dehydration to excess volumes of phase-separating PNIPAM solutions. J Phys Chem B 2014; 118:4253-60. [PMID: 24666206 DOI: 10.1021/jp501539z] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
For aqueous poly(N-isopropyl acrylamide) (PNIPAM) solutions, a structural instability leads to the collapse and aggregation of the macromolecules at the temperature-induced demixing transition. The accompanying cooperative dehydration of the PNIPAM chains is known to play a crucial role in this phase separation. We elucidate the impact of partial dehydration of PNIPAM on the volume changes related to the phase separation of dilute to concentrated PNIPAM solutions. Quasi-elastic neutron scattering enables us to directly follow the isotropic jump diffusion behavior of the hydration water and the almost freely diffusing water. As the hydration number decreases from 8 to 2 for the demixing 25 mass % PNIPAM solution, only a partial dehydration of the PNIPAM chains occurs. Dilatation studies reveal that the transition-induced volume changes depend in a remarkable manner on the PNIPAM concentration of the solutions. The excess volume per mole of H2O molecules expelled from the solvation layers of PNIPAM during phase separation probably strongly increases from dilute to concentrated PNIPAM solutions. This finding is qualitatively related to the immense strain-softening previously observed for demixing PNIPAM solutions.
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Affiliation(s)
- Martine Philipp
- Lehrstuhl für Funktionelle Materialien/Fachgebiet Physik weicher Materie, Physik-Department, Technische Universität München , James-Franck-Str. 1, 85748 Garching, Germany
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35
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Sun TY, Liang LJ, Wang Q, Laaksonen A, Wu T. A molecular dynamics study on pH response of protein adsorbed on peptide-modified polyvinyl alcohol hydrogel. Biomater Sci 2014; 2:419-426. [DOI: 10.1039/c3bm60213c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Molecular dynamics simulation of the protein adsorption on peptide modified PVA hydrogel and the response of hydrogel chains to different pHs.
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Affiliation(s)
- Tian-Yang Sun
- Soft Matter Research Center and Department of Chemistry
- Zhejiang University
- Hangzhou, P. R. China
- Department of Materials and Environmental Chemistry
- Arrhenius Laboratory
| | - Li-Jun Liang
- Soft Matter Research Center and Department of Chemistry
- Zhejiang University
- Hangzhou, P. R. China
| | - Qi Wang
- Soft Matter Research Center and Department of Chemistry
- Zhejiang University
- Hangzhou, P. R. China
| | - Aatto Laaksonen
- Department of Materials and Environmental Chemistry
- Arrhenius Laboratory
- Stockholm University
- Stockholm, Sweden
| | - Tao Wu
- Soft Matter Research Center and Department of Chemistry
- Zhejiang University
- Hangzhou, P. R. China
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36
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Seliktar D, Dikovsky D, Napadensky E. Bioprinting and Tissue Engineering: Recent Advances and Future Perspectives. Isr J Chem 2013. [DOI: 10.1002/ijch.201300084] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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37
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Oh SY, Yang HE, Bae YC. Molecular simulations and thermodynamic modeling for closed-loop phase miscibility of aqueous PEO solutions. Macromol Res 2013. [DOI: 10.1007/s13233-013-1121-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Karatasos K. Self-association and complexation of the anti-cancer drug doxorubicin with PEGylated hyperbranched polyesters in an aqueous environment. J Phys Chem B 2013; 117:2564-75. [PMID: 23379643 DOI: 10.1021/jp312125c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Fully atomistic molecular dynamics simulations were employed in order to examine in detail the self-assembly characteristics and the complexation behavior of the anticancer drug doxorubicin with PEGylated hyperbranched polyesters in an aqueous environment. We have examined two variants of the polymeric compound by altering the length of the hydrophilic poly(ethylene glycol) arms attached to the hydrophobic hyperbranched core. By comparing the clustering properties of the drug molecules in a polymer-free system to those in the polymer-containing models, we were able to assess the effects related to the presence and to the structural features of the polymer moiety. In addition, we have distinguished the effects associated with the neutral and protonated drug molecules separately. It was found that, in the presence of the polymeric material, the drug molecules formed clusters preferentially close to the polymer's periphery, the characteristics of which depended on the structural details of the polymeric host and on the charge of the drug molecules. Hydrogen bonding was found to contribute to the polymer/drug complexation, with the nature of the prevailing donor/acceptor pairs depending on the charge of the drug. Dynamic analysis of the drugs' motion revealed that in the polymer-containing systems the drug molecules experienced a larger degree of confinement within the formed clusters compared to that describing their polymer-free analogues, while the structural coherence of the clusters was found to be more persistent in the system with the larger poly(ethylene glycol) arms. The results described in this work, through the monitoring of both static and dynamic aspects of the self-association and the complexation behavior of the neutral and charged molecules of doxorubicin with the polymeric host, may help toward the elucidation of the key parameters that are involved in the formation of effective polymer-based carriers for drug molecules of the anthracycline family used in cancer chemotherapy.
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Affiliation(s)
- K Karatasos
- Physical Chemistry Laboratory, Chemical Engineering Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Zhou QH, Li M, Yang P, Gu Y. Effect of Hydrogen Bonds on Structures and Glass Transition Temperatures of Maleimide-Isobutene Alternating Copolymers: Molecular Dynamics Simulation Study. MACROMOL THEOR SIMUL 2013. [DOI: 10.1002/mats.201200057] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Polymer networks by molecular dynamics simulation: Formation, thermal, structural and mechanical properties. CHINESE JOURNAL OF POLYMER SCIENCE 2012. [DOI: 10.1007/s10118-013-1209-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Kupal SG, Cerroni B, Ghugare SV, Chiessi E, Paradossi G. Biointerface Properties of Core–Shell Poly(vinyl alcohol)-hyaluronic Acid Microgels Based on Chemoselective Chemistry. Biomacromolecules 2012; 13:3592-601. [DOI: 10.1021/bm301034a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sidhendra G. Kupal
- Dipartimento di Scienze
e Tecnologie Chimiche, Università di Roma Tor Vergata, 00133 Roma, Italy
| | - Barbara Cerroni
- Dipartimento di Scienze
e Tecnologie Chimiche, Università di Roma Tor Vergata, 00133 Roma, Italy
| | - Shivkumar V. Ghugare
- Dipartimento di Scienze
e Tecnologie Chimiche, Università di Roma Tor Vergata, 00133 Roma, Italy
| | - Ester Chiessi
- Dipartimento di Scienze
e Tecnologie Chimiche, Università di Roma Tor Vergata, 00133 Roma, Italy
| | - Gaio Paradossi
- Dipartimento di Scienze
e Tecnologie Chimiche, Università di Roma Tor Vergata, 00133 Roma, Italy
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Tesei G, Paradossi G, Chiessi E. Poly(vinyl alcohol) Oligomer in Dilute Aqueous Solution: A Comparative Molecular Dynamics Simulation Study. J Phys Chem B 2012; 116:10008-19. [DOI: 10.1021/jp305296p] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Giulio Tesei
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
| | - Gaio Paradossi
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
| | - Ester Chiessi
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
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43
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Sun D, Zhou J. Effect of water content on microstructures and oxygen permeation in PSiMA–IPN–PMPC hydrogel: a molecular simulation study. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2011.11.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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44
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He Y, Tsao HK, Jiang S. Improved Mechanical Properties of Zwitterionic Hydrogels with Hydroxyl Groups. J Phys Chem B 2012; 116:5766-70. [DOI: 10.1021/jp300205m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi He
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195,
United States
| | - Heng-Kwong Tsao
- Department
of Chemical and Materials
Engineering, National Central University, Taoyuan 32001, Taiwan
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195,
United States
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45
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Wu R, Li T, Nies E. Langevin Dynamics Simulation of Chain Crosslinking into Polymer Networks. MACROMOL THEOR SIMUL 2012. [DOI: 10.1002/mats.201100088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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Zhang QG, Liu QL, Huang SP, Hu WW, Zhu AM. Microstructure-related performances of poly(vinyl alcohol)-silica hybrid membranes: a molecular dynamics simulation study. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30653k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Poly(amidoamine)-based Dendrimer/siRNA Complexation Studied by Computer Simulations: Effects of pH and Generation on Dendrimer Structure and siRNA Binding. Macromol Biosci 2011; 12:225-40. [DOI: 10.1002/mabi.201100276] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Indexed: 12/13/2022]
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48
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Polymer and Water Dynamics in Poly(vinyl alcohol)/Poly(methacrylate) Networks. A Molecular Dynamics Simulation and Incoherent Neutron Scattering Investigation. Polymers (Basel) 2011. [DOI: 10.3390/polym3041805] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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49
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He Y, Shao Q, Tsao HK, Chen S, Goddard WA, Jiang S. Understanding Three Hydration-Dependent Transitions of Zwitterionic Carboxybetaine Hydrogel by Molecular Dynamics Simulations. J Phys Chem B 2011; 115:11575-80. [DOI: 10.1021/jp204682x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi He
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Qing Shao
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Heng-Kwong Tsao
- Department of Chemical and Materials Engineering, National Central University, Taiwan
| | - Shengfu Chen
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - William A. Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
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Deshmukh S, Mooney DA, MacElroy JM. Molecular simulation study of the effect of cross-linker on the properties of poly(N-isopropyl acrylamide) hydrogel. MOLECULAR SIMULATION 2011. [DOI: 10.1080/08927022.2011.566608] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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