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Bartoletti A, Soares I, Ramos AM, Shashoua Y, Quye A, Casimiro T, Ferreira JL. Assessing the Impact and Suitability of Dense Carbon Dioxide as a Green Solvent for the Treatment of PMMA of Historical Value. Polymers (Basel) 2023; 15:polym15030566. [PMID: 36771867 PMCID: PMC9919672 DOI: 10.3390/polym15030566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/14/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Surface cleaning of plastic materials of historical value can be challenging due to the high risk of inducing detrimental effects and visual alterations. As a result, recent studies have focused on researching new approaches that might reduce the associated hazards and, at the same time, minimize the environmental impact by employing biodegradable and green materials. In this context, the present work investigates the effects and potential suitability of dense carbon dioxide (CO2) as an alternative and green solvent for cleaning plastic materials of historical value. The results of extensive trials with CO2 in different phases (supercritical, liquid, and vapor) and under various conditions (pressure, temperature, exposure, and depressurization time) are reported for new, transparent, thick poly(methyl methacrylate) (PMMA) samples. The impact of CO2 on the weight, the appearance of the samples (dimensions, color, gloss, and surface texture), and modifications to their physicochemical and mechanical properties were monitored via a multi-analytical approach that included optical microscopy, Raman and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopies, and micro-indentation (Vickers hardness). Results showed that CO2 induced undesirable and irreversible changes in PMMA samples (i.e., formation of fractures and stress-induced cracking, drastic decrease in the surface hardness of the samples), independent of the conditions used (i.e., temperature, pressure, CO2 phase, and exposure time).
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Affiliation(s)
- Angelica Bartoletti
- LAQV-REQUIMTE and Department of Conservation and Restoration, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Correspondence: (A.B.); (J.L.F.)
| | - Inês Soares
- LAQV-REQUIMTE and Department of Conservation and Restoration, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Ana Maria Ramos
- LAQV-REQUIMTE and Department of Conservation and Restoration, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- LAQV-REQUIMTE and Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Yvonne Shashoua
- Environmental Archaeology and Materials Science, National Museum of Denmark, 2800 Kongens Lyngby, Denmark
| | - Anita Quye
- Kelvin Centre for Conservation and Cultural Heritage Research, School of Culture and Creative Arts, University of Glasgow, Glasgow G12 8QH, UK
| | - Teresa Casimiro
- LAQV-REQUIMTE and Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Joana Lia Ferreira
- Centro Interuniversitário de História das Ciências e da Tecnologia, Department of Conservation and Restoration, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Correspondence: (A.B.); (J.L.F.)
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2
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Ushiki I, Ota S, Kihara SI, Takishima S. CO2 solubility and diffusivity in poly(vinyl acetate) studied using the PC-SAFT and free volume theory. J Supercrit Fluids 2023. [DOI: 10.1016/j.supflu.2022.105836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3
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Yin F, Yang L, Hou W, Yuan Y, Yu H. Study of dielectric properties of meta-aramid fibers by molecular dynamics methods using modified OPLSAA force field. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Ushiki I, Kawashima H, Kihara SI, Takishima S. Solubility and diffusivity of supercritical CO2 for polycaprolactone in its molten state: Measurement and modeling using PC-SAFT and free volume theory. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2021.105499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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United-Atom Molecular Dynamics Study of the Mechanical and Thermomechanical Properties of an Industrial Epoxy. Polymers (Basel) 2021; 13:polym13193443. [PMID: 34641258 PMCID: PMC8512354 DOI: 10.3390/polym13193443] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/05/2021] [Accepted: 09/26/2021] [Indexed: 01/17/2023] Open
Abstract
Epoxy resins are the most commonly used adhesives in industry due to their versatility, low cost, low toxicity, low shrinkage, high strength, resistance to moisture, and effective electrical resistance. These diverse properties can be tailored based on the chemical structure of the curing agent and the conditions of the curing process. Molecular simulations of epoxy resins have gained attention in recent years as a means to navigate the vast choice of chemical agents and conditions that will give the required properties of the resin. This work examines the statistical uncertainty in predicting thermodynamic and mechanical properties of an industrial epoxy resin using united atom molecular dynamics simulation. The results are compared with experimental measurements of the elastic modulus, Poisson’s ratio, and the glass transition temperature obtained at different temperatures and degrees of curing. The decreasing trend of the elastic modulus with increasing temperature is accurately captured by the simulated model, though the uncertainty in the calculated average is large. The glass transition temperature is expectedly overpredicted due to the high rates accessible to molecular simulations. We find that Poisson’s ratio is particularly sensitive to sample anisotropy as well as the method of evaluation, which explains the lack of consistent trends previously observed with molecular simulation at different degrees of crosslinking and temperatures.
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6
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Basouli H, Mozaffari F, Eslami H. Atomistic insights into structure, ion-pairing and ionic conductivity of 1-ethyl-3-methylimidazolium methylsulfate [Emim][MeSO4] ionic liquid from molecular dynamics simulation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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7
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Eslami H, Das S, Zhou T, Müller-Plathe F. How Alcoholic Disinfectants Affect Coronavirus Model Membranes: Membrane Fluidity, Permeability, and Disintegration. J Phys Chem B 2020; 124:10374-10385. [PMID: 33172260 PMCID: PMC7670823 DOI: 10.1021/acs.jpcb.0c08296] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/28/2020] [Indexed: 01/17/2023]
Abstract
Atomistic molecular dynamics simulations have been carried out with a view to investigating the stability of the SARS-CoV-2 exterior membrane with respect to two common disinfectants, namely, aqueous solutions of ethanol and n-propanol. We used dipalmitoylphosphatidylcholine (DPPC) as a model membrane material and did simulations on both gel and liquid crystalline phases of membrane surrounded by aqueous solutions of varying alcohol concentrations (up to 17.5 mol %). While a moderate effect of alcohol on the gel phase of membrane is observed, its liquid crystalline phase is shown to be influenced dramatically by either alcohol. Our results show that aqueous solutions of only 5 and 10 mol % alcohol already have significant weakening effects on the membrane. The effects of n-propanol are always stronger than those of ethanol. The membrane changes its structure, when exposed to disinfectant solutions; uptake of alcohol causes it to swell laterally but to shrink vertically. At the same time, the orientational order of lipid tails decreases significantly. Metadynamics and grand-canonical ensemble simulations were done to calculate the free-energy profiles for permeation of alcohol and alcohol/water solubility in the DPPC. We found that the free-energy barrier to permeation of the DPPC liquid crystalline phase by all permeants is significantly lowered by alcohol uptake. At a disinfectant concentration of 10 mol %, it becomes insignificant enough to allow almost free passage of the disinfectant to the inside of the virus to cause damage there. It should be noted that the disinfectant also causes the barrier for water permeation to drop. Furthermore, the shrinking of the membrane thickness shortens the gap needed to be crossed by penetrants from outside the virus into its core. The lateral swelling also increases the average distance between head groups, which is a secondary barrier to membrane penetration, and hence further increases the penetration by disinfectants. At alcohol concentrations in the disinfectant solution above 15 mol %, we reliably observe disintegration of the DPPC membrane in its liquid crystalline phase.
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Affiliation(s)
- Hossein Eslami
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
- Department
of Chemistry, College of Sciences, Persian
Gulf University, Boushehr 75168, Iran
| | - Shubhadip Das
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
| | - Tianhang Zhou
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
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8
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Wang L, Huang X, Wang D. Solubility and diffusion coefficient of supercritical CO2 in polystyrene dynamic melt. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe solubility and diffusion coefficient of supercritical CO2 in polystyrene (PS) dynamic melt were studied by using a new constant pressure experimental device. By comparing the experimental results with those of other researchers, the validity of the experimental device and the reliability of the calculated results are verified. The solubility and diffusion coefficient of supercritical CO2 in polystyrene dynamic melts at different temperatures and pressures were obtained. The numerical calculation method, dissolution process, and experimental results are analyzed and compared with that of the static melt. Finally, the effects of stirring speed, pressure, and temperature fluctuation on the solubility and diffusion coefficient are also analyzed.
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Affiliation(s)
- Long Wang
- Jiangxi Key Laboratory of High-Performance Precision Molding, Nanchang University, Nanchang 330031, China
- Institute of Technology. East China Jiao Tong University, Nanchang 330100, China
| | - Xingyuan Huang
- Jiangxi Key Laboratory of High-Performance Precision Molding, Nanchang University, Nanchang 330031, China
- Jiangxi Key Laboratory of Polymer Micro-Nano Manufacturing and Devices, East China, University of Technology, Nanchang 330013, China
| | - Duyang Wang
- Jiangxi Key Laboratory of High-Performance Precision Molding, Nanchang University, Nanchang 330031, China
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9
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Haurat M, Dumon M. Amorphous Polymers' Foaming and Blends with Organic Foaming-Aid Structured Additives in Supercritical CO 2, a Way to Fabricate Porous Polymers from Macro to Nano Porosities in Batch or Continuous Processes. Molecules 2020; 25:E5320. [PMID: 33202668 PMCID: PMC7696767 DOI: 10.3390/molecules25225320] [Citation(s) in RCA: 9] [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: 09/28/2020] [Revised: 11/02/2020] [Accepted: 11/09/2020] [Indexed: 11/30/2022] Open
Abstract
Organic polymers can be made porous via continuous or discontinuous expansion processes in scCO2. The resulting foams properties are controlled by the interplay of three groups of parameters: (i) Chemical, (ii) physico-chemical, and (iii) technological/process that are explained in this paper. The advantages and drawbacks of continuous (extrusion, injection foaming) or discontinuous (batch foaming) foaming processes in scCO2, will be discussed in this article; especially for micro or nano cellular polymers. Indeed, a challenge is to reduce both specific mass (e.g., ρ < 100 kg·m-3) and cell size (e.g., average pore diameter ϕaveragepores < 100 nm). Then a particular system where small "objects" (coreshells CS, block copolymer MAM) are perfectly dispersed at a micrometric to nanometric scale in poly(methyl methacrylate) (PMMA) will be presented. Such "additives", considered as foaming aids, are aimed at "regulating" the foaming and lowering the pore size and/or density of PMMA based foams. Differences between these additives will be shown. Finally, in a PMMA/20 wt% MAM blend, via a quasi one-step batch foaming, a "porous to nonporous" transition is observed in thick samples. A lower limit of pore size (around 50 nm) seems to arise.
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Affiliation(s)
- Margaux Haurat
- Laboratoire de Chimie des Polymères Organiques (LCPO), UMR 5629, Bordeaux INP/ENSCBP, University Bordeaux, CNRS, 16 Avenue Pey-Berland, CEDEX, F-33607 Pessac, France
| | - Michel Dumon
- Laboratoire de Chimie des Polymères Organiques (LCPO), UMR 5629, Bordeaux INP/ENSCBP, University Bordeaux, CNRS, 16 Avenue Pey-Berland, CEDEX, F-33607 Pessac, France
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10
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The effect of self-resistance electric heating on the interfacial behavior of injection molded carbon fiber/polypropylene composites through molecular dynamics analysis. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122915] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Ushiki I, Yoshino Y, Hayashi S, Kihara SI, Takishima S. Measurement and modeling of solubilities and diffusion coefficients of carbon dioxide in poly(ethylene-co-acrylic acid). J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104733] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Jusoh N, Yeong YF, Lock SSM, Lai LS, Suleman MS. Biomethane generation from biogas upgrading by means of thin-film composite membrane comprising Linde T and fluorinated polyimide: optimization of fabrication parameters. RSC Adv 2020; 10:3493-3510. [PMID: 35497748 PMCID: PMC9048814 DOI: 10.1039/c9ra06358g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 12/22/2019] [Indexed: 01/09/2023] Open
Abstract
Generation of biogas from organic substances is an attractive evolution of energy generation from fossil-based energy supply to renewable resources. In order to exhibit viability in terms of technical execution while being economically feasible, successful purification strategies for biomethane formation must be applicable to industrial gas streams at realistic pressures and temperatures. Membrane-based upgrading technologies have great potential to promote biogas processes because they involve less energy and low maintenance. However, the development of membranes with good polymer-filler contact and minimum defects remains a great challenge. Hitherto, researchers have been making many attempts at developing an established route to fabricate thin-film composite membranes. In the present work, an innovative coupling between Linde T and fluorinated polyimide was employed for biogas upgrading. A facile technique for membrane fabrication was proposed via optimization of the fabrication parameters. The results indicated that composite membrane fabricated with 2 hours of total dispersion duration demonstrated a homogeneous distribution of Linde T particles in the fluorinated polyimide matrix and improved the separation characteristics by up to 172% in upgrading biomethane quality. Thus, the fabricated membrane is feasible to be employed for large-scale and lucrative production with enhanced performance in biogas purification via the feasible fabrication method employed in this work. Generation of biogas from organic substances is an attractive evolution of energy generation from fossil-based energy supply to renewable resources.![]()
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Affiliation(s)
- Norwahyu Jusoh
- Centre for Contaminant Control & Utilization (CenCoU)
- Chemical Engineering Department
- Universiti Teknologi PETRONAS
- 32610 Bandar Seri Iskandar
- Malaysia
| | - Yin Fong Yeong
- CO2 Research Centre (CO2RES)
- Chemical Engineering Department
- Universiti Teknologi PETRONAS
- 32610 Bandar Seri Iskandar
- Malaysia
| | - Serene Sow Mun Lock
- CO2 Research Centre (CO2RES)
- Chemical Engineering Department
- Universiti Teknologi PETRONAS
- 32610 Bandar Seri Iskandar
- Malaysia
| | - Li Sze Lai
- Chemical and Petroleum Engineering Department
- Faculty of Engineering, Technology and Built Environment
- UCSI University Kuala Lumpur Campus
- 56000 Bandar Cheras
- Malaysia
| | - Malik Shoaib Suleman
- Department of Chemical Engineering
- Sharif College of Engineering & Technology
- Lahore
- Pakistan
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13
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Solubilities and diffusion coefficients of carbon dioxide and nitrogen in poly(methyl methacrylate) at high temperatures and pressures. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.104565] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Multi-scale investigation on the phase miscibility of polylactic acid/o-carboxymethyl chitosan blends. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Xu Z, Wang Y, Chen Y, Spalding MH, Dong L. Microfluidic chip for automated screening of carbon dioxide conditions for microalgal cell growth. BIOMICROFLUIDICS 2017; 11:064104. [PMID: 29204245 PMCID: PMC5699919 DOI: 10.1063/1.5012508] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 11/06/2017] [Indexed: 05/27/2023]
Abstract
This paper reports on a microfluidic device capable of screening carbon dioxide (CO2) conditions for microalgal cell growth. The device mainly consists of a microfluidic cell culture (MCC) unit, a gas concentration gradient generator (CGG), and an in-line cell growth optical measurement unit. The MCC unit is structured with multiple aqueous-filled cell culture channels at the top layer, multiple CO2 flow channels at the bottom layer, and a commercial hydrophobic gas semipermeable membrane sandwiched between the two channel layers. The CGG unit provides different CO2 concentrations to support photosynthesis of microalgae in the culture channels. The integration of the commercial gas semipermeable membrane into the cell culture device allows rapid mass transport and uniform distribution of CO2 inside the culture medium without using conventional agitation-assisted convection methods, because the diffusion of CO2 from the gas flow channels to the culture channels is fast over a small length scale. In addition, automated in-line monitoring of microalgal cell growth is realized via the optical measurement unit that is able to detect changes in the light intensity transmitted through the cell culture in the culture channels. The microfluidic device also allows a simple grayscale analysis method to quantify the cell growth. The utility of the system is validated by growing Chlamydomonas reinhardtii cells under different low or very-low CO2 levels below the nominal ambient CO2 concentration.
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Affiliation(s)
- Zhen Xu
- Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011, USA
| | - Yingjun Wang
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Yuncong Chen
- Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011, USA
| | - Martin H Spalding
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, Iowa 50011, USA
| | - Liang Dong
- Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011, USA
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16
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Temperature influence on the structure and dynamics of polymers at the interface: Atomistic molecular dynamics simulation of atactic polystyrene nanoconfined between graphene surfaces. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Afandak A, Eslami H. Ion-Pairing and Electrical Conductivity in the Ionic Liquid 1-n-Butyl-3-methylimidazolium Methylsulfate [Bmim][MeSO4]: Molecular Dynamics Simulation Study. J Phys Chem B 2017; 121:7699-7708. [DOI: 10.1021/acs.jpcb.7b06039] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Azam Afandak
- Department of Chemistry, College
of Sciences, Persian Gulf University, Boushehr 75168, Iran
| | - Hossein Eslami
- Department of Chemistry, College
of Sciences, Persian Gulf University, Boushehr 75168, Iran
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18
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Munj HR, Tomasko DL. Polycaprolactone-polymethyl methacrylate electrospun blends for biomedical applications. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17050121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Taguchi T, Miike R, Hatakeyama T, Saito H. Ductile-to-brittle transition behavior of low molecular weight polycarbonate under carbon dioxide. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Tomoaki Taguchi
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Ramu Miike
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Tomoe Hatakeyama
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Hiromu Saito
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
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20
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Jusoh N, Yeong YF, Lau KK, M. Shariff A. Enhanced gas separation performance using mixed matrix membranes containing zeolite T and 6FDA-durene polyimide. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.10.044] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Saha S, Bhowmick AK. Computer aided simulation of thermoplastic elastomer from poly (vinylidene fluoride)/hydrogenated nitrile rubber blend and its experimental verification. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Nikkhah SJ, Moghbeli MR, Hashemianzadeh SM. Dynamic Study of Deformation and Adhesion of an Amorphous Polyethylene/Graphene Interface: A Simulation Study. MACROMOL THEOR SIMUL 2016. [DOI: 10.1002/mats.201600069] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Sousa Javan Nikkhah
- Polymer Nanocomposite Research Lab; School of Chemical Engineering; Iran University of Science and Technology (IUST); Tehran 16846-13114 Iran
| | - Mohammad Reza Moghbeli
- Polymer Nanocomposite Research Lab; School of Chemical Engineering; Iran University of Science and Technology (IUST); Tehran 16846-13114 Iran
| | - Seyed Majid Hashemianzadeh
- Molecular Simulation Research Lab; Department of Chemistry; Iran University of Science and Technology (IUST); Tehran 16846-13114 Iran
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23
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Bol’shakov BV, Syutkin VM. Sorption of oxygen by glassy poly(ethyl methacrylate) at low temperatures. POLYMER SCIENCE SERIES A 2016. [DOI: 10.1134/s0965545x16020036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Taguchi T, Saito H. Effects of plasticization and hydrostatic pressure on tensile properties of PMMA under compressed carbon dioxide and nitrogen. J Appl Polym Sci 2016. [DOI: 10.1002/app.43431] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tomoaki Taguchi
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-Shi, Tokyo 184-8588 Japan
| | - Hiromu Saito
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-Shi, Tokyo 184-8588 Japan
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25
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Bonakala S, Balasubramanian S. Structure–Property Relationships in Amorphous Microporous Polymers. J Phys Chem B 2016; 120:557-65. [DOI: 10.1021/acs.jpcb.5b08842] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Satyanarayana Bonakala
- Chemistry and Physics of
Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
| | - Sundaram Balasubramanian
- Chemistry and Physics of
Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
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26
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BONAKALA SATYANARAYANA, BALASUBRAMANIAN SUNDARAM. Modelling Gas Adsorption in Porous Solids: Roles of Surface Chemistry and Pore Architecture. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0939-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Javan Nikkhah S, Moghbeli MR, Hashemianzadeh SM. A molecular simulation study on the adhesion behavior of a functionalized polyethylene-functionalized graphene interface. Phys Chem Chem Phys 2015; 17:27414-27. [PMID: 26422812 DOI: 10.1039/c5cp04699h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Molecular dynamics simulations were applied to investigate interfacial adhesion between functionalized polyethylene (fPE) and functionalized graphene (fG) surfaces. In order to functionalize the PE and graphene surfaces, various types of functional groups were covalently bonded on the surfaces in a random manner. Adhesion between fPE and fG surfaces was evaluated by the calculation of work of separation (Wsep), while the interfaces were not allowed to relax. According to the simulation results, the combination of the atomic roughness effect and the electronic properties of the functional groups had influence on the adhesion between PE and graphene. The effect of surface reorganization was also investigated by devoting sufficient time for relaxation of the interface. The adhesion in the relaxed interfaces was evaluated via the work of adhesion (Wadh). Relaxation of the interface caused to decrease the atomic roughness of the PE surface, which enhanced adhesion in all of the systems compared to their unrelaxed models. In addition to surface flattening, relaxation also brought about an increase in the atomic density at the interface, which led to enhance the van der Waals interaction and increase interfacial adhesion.
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Affiliation(s)
- Sousa Javan Nikkhah
- School of Chemical Engineering, Iran University of Science and Technology (IUST), P.O. Box 16844-13114, Tehran, Iran
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De Nicola A, Kawakatsu T, Milano G. Generation of Well-Relaxed All-Atom Models of Large Molecular Weight Polymer Melts: A Hybrid Particle-Continuum Approach Based on Particle-Field Molecular Dynamics Simulations. J Chem Theory Comput 2014; 10:5651-67. [PMID: 26583248 DOI: 10.1021/ct500492h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A procedure based on Molecular Dynamics (MD) simulations employing soft potentials derived from self-consistent field (SCF) theory (named MD-SCF) able to generate well-relaxed all-atom structures of polymer melts is proposed. All-atom structures having structural correlations indistinguishable from ones obtained by long MD relaxations have been obtained for poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) melts. The proposed procedure leads to computational costs mainly related on system size rather than to the chain length. Several advantages of the proposed procedure over current coarse-graining/reverse mapping strategies are apparent. No parametrization is needed to generate relaxed structures of different polymers at different scales or resolutions. There is no need for special algorithms or back-mapping schemes to change the resolution of the models. This characteristic makes the procedure general and its extension to other polymer architectures straightforward. A similar procedure can be easily extended to the generation of all-atom structures of block copolymer melts and polymer nanocomposites.
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Affiliation(s)
- Antonio De Nicola
- Dipartimento di Chimica e Biologia, Università degli Studi di Salerno , via Ponte don Melillo, Fisciano, Salerno I-84085, Italy.,IMAST Scarl-Technological District in Polymer and Composite Engineering, Piazza Bovio 22, Napoli, Napoli I-80133, Italy
| | - Toshihiro Kawakatsu
- Department of Physics, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Giuseppe Milano
- Dipartimento di Chimica e Biologia, Università degli Studi di Salerno , via Ponte don Melillo, Fisciano, Salerno I-84085, Italy.,IMAST Scarl-Technological District in Polymer and Composite Engineering, Piazza Bovio 22, Napoli, Napoli I-80133, Italy
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