1
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Brownell M, Frischknecht AL, Wilson MA. Subdiffusive High-Pressure Hydrogen Gas Dynamics in Elastomers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew Brownell
- Computational Materials and Data Science, Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-0889, United States
| | - Amalie L. Frischknecht
- Center for Integrated Nanotechnologies, Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-1303, United States
| | - Mark A. Wilson
- Computational Materials and Data Science, Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185-0889, United States
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2
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Dhamankar S, Webb MA. Chemically specific coarse‐graining of polymers: Methods and prospects. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210555] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Satyen Dhamankar
- Department of Chemical and Biological Engineering Princeton University Princeton New Jersey USA
| | - Michael A. Webb
- Department of Chemical and Biological Engineering Princeton University Princeton New Jersey USA
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3
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Goubko MV, Miloserdov OA, Yampolskii YP, Ryzhikh VY. Prediction of Solubility Parameters of Light Gases in Glassy Polymers on the Basis of Simulation of a Short Segment of a Polymer Chain. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x19050067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Vergadou N, Theodorou DN. Molecular Modeling Investigations of Sorption and Diffusion of Small Molecules in Glassy Polymers. MEMBRANES 2019; 9:E98. [PMID: 31398889 PMCID: PMC6723301 DOI: 10.3390/membranes9080098] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 11/16/2022]
Abstract
With a wide range of applications, from energy and environmental engineering, such as in gas separations and water purification, to biomedical engineering and packaging, glassy polymeric materials remain in the core of novel membrane and state-of the art barrier technologies. This review focuses on molecular simulation methodologies implemented for the study of sorption and diffusion of small molecules in dense glassy polymeric systems. Basic concepts are introduced and systematic methods for the generation of realistic polymer configurations are briefly presented. Challenges related to the long length and time scale phenomena that govern the permeation process in the glassy polymer matrix are described and molecular simulation approaches developed to address the multiscale problem at hand are discussed.
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Affiliation(s)
- Niki Vergadou
- Molecular Thermodynamics and Modelling of Materials Laboratory, Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, Aghia Paraskevi Attikis, GR-15310 Athens, Greece.
| | - Doros N Theodorou
- School of Chemical Engineering, National Technical University of Athens, GR 15780 Athens, Greece
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5
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Xi L. Molecular simulation for predicting the rheological properties of polymer melts. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1605600] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Li Xi
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
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6
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Li D, Panchal K, Mafi R, Xi L. An Atomistic Evaluation of the Compatibility and Plasticization Efficacy of Phthalates in Poly(vinyl chloride). Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00756] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dongyang Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Kushal Panchal
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
| | - Roozbeh Mafi
- Canadian General
Tower, Ltd., Cambridge, Ontario N1R 5T6, Canada
| | - Li Xi
- Department of Chemical Engineering, McMaster Universtiy, Hamilton, Ontario L8S 4L7, Canada
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7
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Kupgan G, Abbott LJ, Hart KE, Colina CM. Modeling Amorphous Microporous Polymers for CO2 Capture and Separations. Chem Rev 2018; 118:5488-5538. [DOI: 10.1021/acs.chemrev.7b00691] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Grit Kupgan
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
- George & Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, Florida 32611, United States
- Center for Macromolecular Science & Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Lauren J. Abbott
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Kyle E. Hart
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Coray M. Colina
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
- George & Josephine Butler Polymer Research Laboratory, University of Florida, Gainesville, Florida 32611, United States
- Center for Macromolecular Science & Engineering, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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8
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Turner CH, Ji J, Lu Z, Lei Y. Analysis of the propylene epoxidation mechanism on supported gold nanoparticles. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.09.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Lin E, You X, Kriegel RM, Moffitt RD, Batra RC. Interdiffusion of small molecules into a glassy polymer film via coarse-grained molecular dynamics simulations. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Goubko M, Miloserdov O, Yampolskii Y, Alentiev A, Ryzhikh V. A novel model to predict infinite dilution solubility coefficients in glassy polymers. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mikhail Goubko
- V. A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences; 65 Profsoyuznaya street Moscow 117997 Russia
| | - Oleg Miloserdov
- V. A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences; 65 Profsoyuznaya street Moscow 117997 Russia
| | - Yuri Yampolskii
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences; 29 Leninsky prospect Moscow 119991 Russia
| | - Alexander Alentiev
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences; 29 Leninsky prospect Moscow 119991 Russia
| | - Victoria Ryzhikh
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences; 29 Leninsky prospect Moscow 119991 Russia
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11
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Mermigkis PG, Tsalikis DG, Mavrantzas VG. Determination of the effective diffusivity of water in a poly (methyl methacrylate) membrane containing carbon nanotubes using kinetic Monte Carlo simulations. J Chem Phys 2015; 143:164903. [PMID: 26520550 DOI: 10.1063/1.4934225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A kinetic Monte Carlo (kMC) simulation algorithm is developed for computing the effective diffusivity of water molecules in a poly(methyl methacrylate) (PMMA) matrix containing carbon nanotubes (CNTs) at several loadings. The simulations are conducted on a cubic lattice to the bonds of which rate constants are assigned governing the elementary jump events of water molecules from one lattice site to another. Lattice sites belonging to PMMA domains of the membrane are assigned different rates than lattice sites belonging to CNT domains. Values of these two rate constants are extracted from available numerical data for water diffusivity within a PMMA matrix and a CNT pre-computed on the basis of independent atomistic molecular dynamics simulations, which show that water diffusivity in CNTs is 3 orders of magnitude faster than in PMMA. Our discrete-space, continuum-time kMC simulation results for several PMMA-CNT nanocomposite membranes (characterized by different values of CNT length L and diameter D and by different loadings of the matrix in CNTs) demonstrate that the overall or effective diffusivity, D(eff), of water in the entire polymeric membrane is of the same order of magnitude as its diffusivity in PMMA domains and increases only linearly with the concentration C (vol. %) in nanotubes. For a constant value of the concentration C, D(eff) is found to vary practically linearly also with the CNT aspect ratio L/D. The kMC data allow us to propose a simple bilinear expression for D(eff) as a function of C and L/D that can describe the numerical data for water mobility in the membrane extremely accurately. Additional simulations with two different CNT configurations (completely random versus aligned) show that CNT orientation in the polymeric matrix has only a minor effect on D(eff) (as long as CNTs do not fully penetrate the membrane). We have also extensively analyzed and quantified sublinear (anomalous) diffusive phenomena over small to moderate times and correlated them with the time needed for penetrant water molecules to explore the available large, fast-diffusing CNT pores before Fickian diffusion is reached.
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Affiliation(s)
| | - Dimitrios G Tsalikis
- Department of Chemical Engineering, University of Patras, GR 26500 Patras, Greece
| | - Vlasis G Mavrantzas
- Department of Chemical Engineering, University of Patras, GR 26500 Patras, Greece
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12
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Xi L, Shah M, Trout BL. Hopping of Water in a Glassy Polymer Studied via Transition Path Sampling and Likelihood Maximization. J Phys Chem B 2013; 117:3634-47. [DOI: 10.1021/jp3099973] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Li Xi
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
| | - Manas Shah
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
| | - Bernhardt L. Trout
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
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13
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Velioğlu S, Ahunbay MG, Tantekin-Ersolmaz SB. Investigation of CO2-induced plasticization in fluorinated polyimide membranes via molecular simulation. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2012.06.043] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Hanson B, Pryamitsyn V, Ganesan V. Computer Simulations of Gas Diffusion in Polystyrene–C60 Fullerene Nanocomposites Using Trajectory Extending Kinetic Monte Carlo Method. J Phys Chem B 2011; 116:95-103. [DOI: 10.1021/jp209294t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ben Hanson
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Victor Pryamitsyn
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Venkat Ganesan
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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15
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Ohashi H, Tamaki T, Yamaguchi T. Physical Re-Examination of Parameters on a Molecular Collisions-Based Diffusion Model for Diffusivity Prediction in Polymers. J Phys Chem B 2011; 115:15181-7. [DOI: 10.1021/jp2068717] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hidenori Ohashi
- Chemical Resources Laboratory, Tokyo Institute of Technology, R1-17, 4259 Nagatsuta-cho, Midori-ku, Yokohama-city, Kanagawa 226-8503, Japan
| | - Takanori Tamaki
- Chemical Resources Laboratory, Tokyo Institute of Technology, R1-17, 4259 Nagatsuta-cho, Midori-ku, Yokohama-city, Kanagawa 226-8503, Japan
| | - Takeo Yamaguchi
- Chemical Resources Laboratory, Tokyo Institute of Technology, R1-17, 4259 Nagatsuta-cho, Midori-ku, Yokohama-city, Kanagawa 226-8503, Japan
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16
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Ackerman DM, Skoulidas AI, Sholl DS, Karl Johnson J. Diffusivities of Ar and Ne in Carbon Nanotubes. MOLECULAR SIMULATION 2011. [DOI: 10.1080/0892702031000103239] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- David M. Ackerman
- a Department of Chemical and Petroleum Engineering , University of Pittsburgh , 15261 , Pittsburgh , PA , USA
| | - Anastasios I. Skoulidas
- b Department of Chemical Engineering , Carnegie Mellon University , 15213 , Pittsburgh , PA , USA
| | - David S. Sholl
- c National Energy Technology Laboratory , 15236 , Pittsburgh , PA , USA
| | - J. Karl Johnson
- d Department of Chemistry , Imperial College of Science Technology and Medicine , SWAY, 7 2 , South Kensington , UK
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17
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Ramesh N, Davis PK, Zielinski JM, Danner RP, Duda JL. Application of free-volume theory to self diffusion of solvents in polymers below the glass transition temperature: A review. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/polb.22366] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Neyertz S, Brown D. A Trajectory-Extending Kinetic Monte Carlo (TEKMC) Method for Estimating Penetrant Diffusion Coefficients in Molecular Dynamics Simulations of Glassy Polymers. Macromolecules 2010. [DOI: 10.1021/ma1019895] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- S. Neyertz
- LMOPS-UMR CNRS 5041, University of Savoie, Bât. IUT, Savoie Technolac, 73376 Le Bourget-du-Lac Cedex, France
| | - D. Brown
- LMOPS-UMR CNRS 5041, University of Savoie, Bât. IUT, Savoie Technolac, 73376 Le Bourget-du-Lac Cedex, France
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19
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20
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Neyertz S, Brown D, Pandiyan S, van der Vegt NFA. Carbon Dioxide Diffusion and Plasticization in Fluorinated Polyimides. Macromolecules 2010. [DOI: 10.1021/ma1010205] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- S. Neyertz
- LMOPS-UMR CNRS 5041, University of Savoie, Bât. IUT, Savoie Technolac, 73376 Le Bourget-du-Lac Cedex, France
| | - D. Brown
- LMOPS-UMR CNRS 5041, University of Savoie, Bât. IUT, Savoie Technolac, 73376 Le Bourget-du-Lac Cedex, France
| | - S. Pandiyan
- LMOPS-UMR CNRS 5041, University of Savoie, Bât. IUT, Savoie Technolac, 73376 Le Bourget-du-Lac Cedex, France
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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21
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Xiao J, Huang Y, Manke CW. Computational Design of Polymer Nanocomposite Coatings: A Multiscale Hierarchical Approach for Barrier Property Prediction. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901927t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jie Xiao
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
| | - Yinlun Huang
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
| | - Charles W. Manke
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
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22
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Pierce F, Perahia D, Grest GS. Interdiffusion of Short Chain Oligomers into an Entangled Polymer Film. Macromolecules 2009. [DOI: 10.1021/ma9013109] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Flint Pierce
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634
| | - Dvora Perahia
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634
| | - Gary S. Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87185
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23
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Ismail AE, Grest GS, Heine DR, Stevens MJ, Tsige M. Interfacial Structure and Dynamics of Siloxane Systems: PDMS−Vapor and PDMS−Water. Macromolecules 2009. [DOI: 10.1021/ma802805y] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Gary S. Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87185
| | - David R. Heine
- Sandia National Laboratories, Albuquerque, New Mexico 87185
| | | | - Mesfin Tsige
- Department of Physics, Southern Illinois University, Mail Code 4401, Carbondale, Illinois 62901
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24
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Gestoso P, Karayiannis NC. Molecular simulation of the effect of temperature and architecture on polyethylene barrier properties. J Phys Chem B 2008; 112:5646-60. [PMID: 18407702 DOI: 10.1021/jp073676q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present a multiscale approach for calculating the low-concentration solubility, diffusivity, and selectivity of small molecules through polymer matrixes. The proposed modeling scheme consists of two main stages; first, thoroughly equilibrated and representative poly(ethylene) (PE) atomistic melt configurations were obtained through the application of a Monte Carlo (MC) scheme based on advanced chain-connectivity altering moves (linear architectures) or the combination of localized MC moves followed by molecular dynamics. In the second phase, transition-state theory (TST), as proposed by Gusev and Suter [Gusev, A. A.; Suter, U. W. J. Chem. Phys. 1993, 99, 2228], was invoked in a coarser level of description to calculate the barrier properties of the studied macromolecules to small gas molecules at infinite dilution. The multiscale methodology was successfully applied on PE melts characterized by various molecular weights (MW) (from C78 up to C1000) and polydispersity indices at a wide range of temperature conditions. The effect of molecular architecture on the barrier properties was examined through the comparison between linear and short-chain branched structures bearing the same total number of carbon atoms. Simulation results were found to be in very good agreement with available experimental data. Additionally, the new scheme has been further validated by comparing the qualitative behavior of solubility, diffusivity, and selectivity with previously reported trends in the literature based on both experimental and simulation studies. The present study concludes that density plays a dominant role that determines the behavior of the polymer as a barrier material, especially in terms of diffusivity. Additionally, it is evidenced that short-chain branching has a small effect on the barrier properties of PE when the comparison is performed on purely amorphous samples. The hierarchical method presented here not only is faster when compared against conventional molecular dynamics simulations, but in some cases, like the vicinity of the glass transition temperature or for long polymer chain melts, it opens the way to the calculation of the barrier properties at realistic simulation times.
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Affiliation(s)
- Patricia Gestoso
- Accelrys Ltd., 334 Cambridge Science Park, Cambridge, CB4 OWN, UK.
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26
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Hess S, Becker A, Baluschev S, Yakutkin V, Wegner G. A Comparative Study of Oxygen Permeabilities of Film-Forming Polymers by Quenching of Platinum Porphyrin Phosphorescence. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700196] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Willmore FT, Wang XY, Sanchez IC. Gas diffusion in glasses via a probabilistic molecular dynamics. J Chem Phys 2007; 126:234502. [PMID: 17600420 DOI: 10.1063/1.2737052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A probabilistic protocol which makes possible the calculation of the diffusivity of light gases in amorphous materials from limited Monte Carlo and molecular dynamics data is presented. Diffusion coefficients are calculated for helium and methane in polystyrene, and for helium, neon, and methane in three pairs of polysulfone isomers. Results include diffusion coefficients as small as 10(-9) cm2/s and are in good agreement with results obtained from traditional molecular dynamics and with available experimental data.
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Affiliation(s)
- Frank T Willmore
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
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28
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Vitrac O, Hayert M. Effect of the distribution of sorption sites on transport diffusivities: A contribution to the transport of medium-weight-molecules in polymeric materials. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2007.01.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Zhao ZJ, Wang Q, Zhang L, Liu YC. A Different Diffusion Mechanism for Drug Molecules in Amorphous Polymers. J Phys Chem B 2007; 111:4411-6. [PMID: 17428084 DOI: 10.1021/jp0673718] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polymer materials are widely used in controlled drug release, and the diffusion property of drug molecules in these materials is of great importance. In this work, the diffusion behavior of a model drug (aspirin) in different ratios of poly(lactic acid-co-ethylene glycol) (PLA-PEG) was investigated by molecular dynamics simulations. Two major factors, which influence the diffusion of aspirin in polymer matrix: the wriggling of the polymer chain and the free volume of the polymer matrix, are discussed. The wriggling of the polymer chain mainly controls the diffusion of aspirin molecules. Free volume becomes the secondary effect. For two different polymers having a similar degree of wriggling, the free volume controls the diffusion of the aspirin molecules. Comparing with the diffusion behavior of small gas molecules in polymer matrix, a different mechanism was proposed for the drug molecules. The drug molecules can only diffuse along with the wriggling of the polymer matrix.
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Affiliation(s)
- Zhi-Jian Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China
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30
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Chen H, Johnson JK, Sholl DS. Transport diffusion of gases is rapid in flexible carbon nanotubes. J Phys Chem B 2006; 110:1971-5. [PMID: 16471771 DOI: 10.1021/jp056911i] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular dynamics simulations of rigid, defect-free single-walled carbon nanotubes have previously suggested that the transport diffusivity of gases adsorbed in these materials can be orders of magnitude higher than any other nanoporous material (A. I. Skoulidas et al., Phys. Rev. Lett. 2002, 89, 185901). These simulations must overestimate the molecular diffusion coefficients because they neglect energy exchange between the diffusing molecules and the nanotube. Recently, Jakobtorweihen et al. have reported careful simulations of molecular self-diffusion that allow nanotube flexibility (Phys. Rev. Lett. 2005, 95, 044501). We have used the efficient thermostat developed by Jakobtorweihen et al. to examine the influence of nanotube flexibility on the transport diffusion of CH4 in (20,0) and (15,0) nanotubes. The inclusion of nanotube flexibility reduces the transport diffusion relative to the rigid nanotube by roughly an order of magnitude close to zero pressure, but at pressures above about 1 bar the transport diffusivities for flexible and rigid nanotubes are very similar, differing by less than a factor or two on average. Hence, the transport diffusivities are still extremely large compared to other known materials when flexibility is taken into account.
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Affiliation(s)
- Haibin Chen
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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32
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Neyertz S, Douanne A, Brown D. Effect of Interfacial Structure on Permeation Properties of Glassy Polymers. Macromolecules 2005. [DOI: 10.1021/ma051463y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sylvie Neyertz
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
| | - Anthony Douanne
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
| | - David Brown
- Laboratoire Matériaux Organiques à Propriétés Spécifiques (LMOPS), UMR CNRS 5041, Université de Savoie, Bât. IUT, 73376 Le Bourget du Lac Cedex, France
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Tsige M, Grest GS. Interdiffusion of solvent into glassy polymer films: A molecular dynamics study. J Chem Phys 2004; 121:7513-9. [PMID: 15473827 DOI: 10.1063/1.1797992] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Large scale molecular dynamics and grand canonical Monte Carlo simulation techniques are used to study the behavior of the interdiffusion of a solvent into an entangled polymer matrix as the state of the polymer changes from a melt to a glass. The weight gain by the polymer increases with time t as t(1/2) in agreement with Fickian diffusion for all cases studied, although the diffusivity is found to be strongly concentration dependent especially as one approaches the glass transition temperature of the polymer. The diffusivity as a function of solvent concentration determined using the one-dimensional Fick's model of the diffusion equation is compared to the diffusivity calculated using the Darken equation from simulations of equilibrated solvent-polymer solutions. The diffusivity calculated using these two different approaches are in good agreement. The behavior of the diffusivity strongly depends on the state of the polymer and is related to the shape of the solvent concentration profile.
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Affiliation(s)
- Mesfin Tsige
- Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
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Chang R, Jagannathan K, Yethiraj A. Diffusion of hard sphere fluids in disordered media: a molecular dynamics simulation study. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2004; 69:051101. [PMID: 15244802 DOI: 10.1103/physreve.69.051101] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2004] [Indexed: 05/24/2023]
Abstract
Molecular dynamic simulations are reported for the static and dynamic properties of hard sphere fluids in matrices (or media) composed of quenched hard spheres. The effect of fluid and matrix density, matrix structure, and fluid to matrix sphere size ratio on the static and dynamic properties is studied using discontinuous molecular dynamics. The matrix density has a stronger effect on the self-diffusion coefficient than the fluid density, especially at high matrix densities where the geometric constraints due to the quenched spheres are significant. When the ratio of the size of the fluid spheres to that of the matrix spheres is equal to or greater than one, the diffusion increases as the fluid density is increased, at constant total volume fraction. This trend is however reversed if the ratio is smaller than one. Different methods of generating the matrix have a very strong effect on the dynamic properties even though the static correlations are similar. An analysis of the single-chain structure factor of the particle trajectories shows a change in the particle diffusive behavior at different time scales, suggestive of a hopping mechanism, although normal diffusion is recovered at long times. At high matrix densities, there is considerable heterogeneity in the diffusion of the fluid particles. The simulations demonstrate that the correlations in the matrix play a significant role on the diffusion of fluid spheres. For example, the diffusion constant in matrices constructed by different methods can be an order of magnitude different even though the pair correlation functions are almost identical.
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Affiliation(s)
- Rakwoo Chang
- Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA
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Karayiannis NC, Mavrantzas VG, Theodorou DN. Detailed Atomistic Simulation of the Segmental Dynamics and Barrier Properties of Amorphous Poly(ethylene terephthalate) and Poly(ethylene isophthalate). Macromolecules 2004. [DOI: 10.1021/ma0352577] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nikos Ch. Karayiannis
- Institute of Chemical Engineering and High Temperature Chemical Processes (ICE/HT-FORTH) and Department of Chemical Engineering, University of Patras, Patras GR 26504, and Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece
| | - Vlasis G. Mavrantzas
- Institute of Chemical Engineering and High Temperature Chemical Processes (ICE/HT-FORTH) and Department of Chemical Engineering, University of Patras, Patras GR 26504, and Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece
| | - Doros N. Theodorou
- Institute of Chemical Engineering and High Temperature Chemical Processes (ICE/HT-FORTH) and Department of Chemical Engineering, University of Patras, Patras GR 26504, and Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, Athens GR 15780, Greece
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Tsige M, Grest GS. Molecular dynamics simulation of solvent–polymer interdiffusion: Fickian diffusion. J Chem Phys 2004; 120:2989-95. [PMID: 15268446 DOI: 10.1063/1.1640347] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The interdiffusion of a solvent into a polymer melt has been studied using large scale molecular dynamics and Monte Carlo simulation techniques. The solvent concentration profile and weight gain by the polymer have been measured as a function of time. The weight gain is found to scale as t(1/2), which is expected for Fickian diffusion. The concentration profiles are fit very well assuming Fick's second law with a constant diffusivity. The diffusivity found from fitting Fick's second law is found to be independent of time and equal to the self-diffusion constant in the dilute solvent limit. We separately calculated the diffusivity as a function of concentration using the Darken equation and found that the diffusivity is essentially constant for the concentration range relevant for interdiffusion.
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Affiliation(s)
- Mesfin Tsige
- Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
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Theodorou DN. Understanding and predicting structure–property relations in polymeric materials through molecular simulations. Mol Phys 2004. [DOI: 10.1080/00268970310001640085] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tunca C, Ford DM. A hierarchical approach to the molecular modeling of diffusion and adsorption at nonzero loading in microporous materials. Chem Eng Sci 2003. [DOI: 10.1016/s0009-2509(03)00201-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Skoulidas AI, Ackerman DM, Johnson JK, Sholl DS. Rapid transport of gases in carbon nanotubes. PHYSICAL REVIEW LETTERS 2002; 89:185901. [PMID: 12398618 DOI: 10.1103/physrevlett.89.185901] [Citation(s) in RCA: 339] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2002] [Indexed: 05/24/2023]
Abstract
We report atomistic simulations for both self- and transport diffusivities of light gases in carbon nanotubes and in two zeolites with comparable pore sizes. We find that transport rates in nanotubes are orders of magnitude faster than in the zeolites we have studied or in any microporous material for which experimental data are available. The exceptionally high transport rates in nanotubes are shown to be a result of the inherent smoothness of the nanotubes. We predict that carbon nanotube membranes will have fluxes that are orders of magnitude greater than crystalline zeolite membranes.
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Affiliation(s)
- Anastasios I Skoulidas
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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