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Fan H, He J, Heiranian M, Pan W, Li Y, Elimelech M. The physical basis for solvent flow in organic solvent nanofiltration. SCIENCE ADVANCES 2024; 10:eado4332. [PMID: 38875330 PMCID: PMC11177934 DOI: 10.1126/sciadv.ado4332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 05/10/2024] [Indexed: 06/16/2024]
Abstract
Organic solvent nanofiltration (OSN) is an emerging membrane technology that could revolutionize chemical separations in numerous vital industries. Despite its significance, there remains a lack of fundamental understanding of solvent transport mechanisms in OSN membranes. Here, we use an extended Flory-Rehner theory, nonequilibrium molecular dynamic simulations, and organic solvent transport experiments to demonstrate that solvent flow in OSN membranes is driven by a pressure gradient. We show that solvent molecules migrate as clusters through interconnected pathways within the membrane pore structure, challenging the widely accepted diffusion-based view of solvent transport in OSN. We further reveal that solvent permeance is dependent on solvent affinity to the OSN membrane, which, in turn, controls the membrane pore structure. Our fundamental insights lay the scientific groundwork for the development of next-generation OSN membranes.
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Affiliation(s)
- Hanqing Fan
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Jinlong He
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706-1572, USA
| | - Mohammad Heiranian
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27606, USA
| | - Weiyi Pan
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Ying Li
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706-1572, USA
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
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2
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Zhu H, Szymczyk A, Ghoufi A. Multiscale modelling of transport in polymer-based reverse-osmosis/nanofiltration membranes: present and future. DISCOVER NANO 2024; 19:91. [PMID: 38771417 PMCID: PMC11109084 DOI: 10.1186/s11671-024-04020-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/22/2024] [Indexed: 05/22/2024]
Abstract
Nanofiltration (NF) and reverse osmosis (RO) processes are physical separation technologies used to remove contaminants from liquid streams by employing dense polymer-based membranes with nanometric voids that confine fluids at the nanoscale. At this level, physical properties such as solvent and solute permeabilities are intricately linked to molecular interactions. Initially, numerous studies focused on developing macroscopic transport models to gain insights into separation properties at the nanometer scale. However, continuum-based models have limitations in nanoconfined situations that can be overcome by force field molecular simulations. Continuum-based models heavily rely on bulk properties, often neglecting critical factors like liquid structuring, pore geometry, and molecular/chemical specifics. Molecular/mesoscale simulations, while encompassing these details, often face limitations in time and spatial scales. Therefore, achieving a comprehensive understanding of transport requires a synergistic integration of both approaches through a multiscale approach that effectively combines and merges both scales. This review aims to provide a comprehensive overview of the state-of-the-art in multiscale modeling of transport through NF/RO membranes, spanning from the nanoscale to continuum media.
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Affiliation(s)
- Haochen Zhu
- State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Rd., Shanghai, 200092, China.
| | - Anthony Szymczyk
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, Univ Rennes, 35000, Rennes, France.
| | - Aziz Ghoufi
- CNRS, ICMPE (Institut de Chimie et des Matériaux Paris-Est) - UMR 7182, Univ Paris-East Creteil, 94320, Thiais, France.
- CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, Univ Rennes, 35000, Rennes, France.
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3
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Nguyen MN, Jue ML, Buchsbaum SF, Park SJ, Vollnhals F, Christiansen S, Fornasiero F, Schäfer AI. Interplay of the forces governing steroid hormone micropollutant adsorption in vertically-aligned carbon nanotube membrane nanopores. Nat Commun 2024; 15:1114. [PMID: 38321016 PMCID: PMC10847130 DOI: 10.1038/s41467-024-44883-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 01/09/2024] [Indexed: 02/08/2024] Open
Abstract
Vertically-aligned carbon nanotube (VaCNT) membranes allow water to conduct rapidly at low pressures and open up the possibility for water purification and desalination, although the ultralow viscous stress in hydrophobic and low-tortuosity nanopores prevents surface interactions with contaminants. In this experimental investigation, steroid hormone micropollutant adsorption by VaCNT membranes is quantified and explained via the interplay of the hydrodynamic drag and friction forces acting on the hormone, and the adhesive and repulsive forces between the hormone and the inner carbon nanotube wall. It is concluded that a drag force above 2.2 × 10-3 pN overcomes the friction force resulting in insignificant adsorption, whereas lowering the drag force from 2.2 × 10-3 to 4.3 × 10-4 pN increases the adsorbed mass of hormones from zero to 0.4 ng cm-2. At a low drag force of 1.6 × 10-3 pN, the adsorbed mass of four hormones is correlated with the hormone-wall adhesive (van der Waals) force. These findings explain micropollutant adsorption in nanopores via the forces acting on the micropollutant along and perpendicular to the flow, which can be exploited for selectivity.
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Affiliation(s)
- Minh N Nguyen
- Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Melinda L Jue
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA, US
| | - Steven F Buchsbaum
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA, US
| | - Sei Jin Park
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA, US
| | - Florian Vollnhals
- Institute for Nanotechnology and Correlative Microscopy (INAM), Forchheim, Germany
| | - Silke Christiansen
- Institute for Nanotechnology and Correlative Microscopy (INAM), Forchheim, Germany
- Fraunhofer Institute for Ceramic Technologies and Systems (IKTS), Forchheim, Germany
| | - Francesco Fornasiero
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory (LLNL), Livermore, CA, US
| | - Andrea I Schäfer
- Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.
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Nagendraprasad G, Adupa V, Anki Reddy K, Das C, Karan S. Semiaromatic Polyamide-Based Membrane in Forward Osmosis: Molecular Insights. J Phys Chem B 2023. [PMID: 37490347 DOI: 10.1021/acs.jpcb.3c01922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Despite the increased interest in forward osmosis (FO) in recent years, the technology's advancement in commercial and industrial applications has been hampered by the absence of suitable FO membranes and ideal draw solutes, which demands the exploration of new membranes and novel draw solutes targeted for some specific applications. In this context, we considered a semiaromatic polyamide (SAPA) for an application where monovalent salt can be permeated but has high selectivity toward divalent salt and excellent water permeability. In this regard, we constructed an atomistic model for the membrane via a heuristic approach using an equilibrated mixture of hydrolyzed trimesoyl chloride and piperazine monomers and performed nonequilibrium molecular dynamics simulations on the SAPA membrane in the FO process to understand the structural properties and performance of the membrane at the atomistic level. We used pure water as the feed and Na2SO4 as the draw solution. It is observed that the SAPA membrane shows excellent water permeability and no reverse draw solute flux. To further test the dynamics of salt ions inside the membranes, we performed two distinct equilibrium simulations on systems consisting of either monovalent salt, such as NaCl, or divalent salt, such as Na2SO4. The atomistic details of the interactions between the functional groups of the membrane and salt ions provided in this work can inspire further experiments on SAPA membranes in the context of separation of monovalent and divalent salts, which have applications in the treatment of textile industry wastewater.
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Affiliation(s)
- Gunolla Nagendraprasad
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Vasista Adupa
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - K Anki Reddy
- Department of Chemical Engineering, Indian Institute of Technology Tirupati, Tirupati, Andhra Pradesh 517506, India
| | - Chandan Das
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Santanu Karan
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar, Gujarat 364002, India
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5
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Wang L, He J, Heiranian M, Fan H, Song L, Li Y, Elimelech M. Water transport in reverse osmosis membranes is governed by pore flow, not a solution-diffusion mechanism. SCIENCE ADVANCES 2023; 9:eadf8488. [PMID: 37058571 PMCID: PMC10104469 DOI: 10.1126/sciadv.adf8488] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/10/2023] [Indexed: 06/19/2023]
Abstract
We performed nonequilibrium molecular dynamics (NEMD) simulations and solvent permeation experiments to unravel the mechanism of water transport in reverse osmosis (RO) membranes. The NEMD simulations reveal that water transport is driven by a pressure gradient within the membranes, not by a water concentration gradient, in marked contrast to the classic solution-diffusion model. We further show that water molecules travel as clusters through a network of pores that are transiently connected. Permeation experiments with water and organic solvents using polyamide and cellulose triacetate RO membranes showed that solvent permeance depends on the membrane pore size, kinetic diameter of solvent molecules, and solvent viscosity. This observation is not consistent with the solution-diffusion model, where permeance depends on the solvent solubility. Motivated by these observations, we demonstrate that the solution-friction model, in which transport is driven by a pressure gradient, can describe water and solvent transport in RO membranes.
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Affiliation(s)
- Li Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Jinlong He
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706-1572, USA
| | - Mohammad Heiranian
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Hanqing Fan
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Lianfa Song
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA
| | - Ying Li
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706-1572, USA
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
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6
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He J, Arbaugh T, Nguyen D, Xian W, Hoek E, McCutcheon JR, Li Y. Molecular mechanisms of thickness-dependent water desalination in polyamide reverse-osmosis membranes. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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7
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He J, Yang J, McCutcheon JR, Li Y. Molecular insights into the structure-property relationships of 3D printed polyamide reverse-osmosis membrane for desalination. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Zhang X, Choi PJ, Khanzada NK, Sun J, Wong PW, Guo J, Ling L, Wu D, Jang A, An AK. FO membrane fabricated by layer-by-layer interfacial polymerisation and grafted sulfonamide group for improving chlorine resistance and water permeability. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Heiranian M, DuChanois RM, Ritt CL, Violet C, Elimelech M. Molecular Simulations to Elucidate Transport Phenomena in Polymeric Membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3313-3323. [PMID: 35235312 DOI: 10.1021/acs.est.2c00440] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite decades of dominance in separation technology, progress in the design and development of high-performance polymer-based membranes has been incremental. Recent advances in materials science and chemical synthesis provide opportunities for molecular-level design of next-generation membrane materials. Such designs necessitate a fundamental understanding of transport and separation mechanisms at the molecular scale. Molecular simulations are important tools that could lead to the development of fundamental structure-property-performance relationships for advancing membrane design. In this Perspective, we assess the application and capability of molecular simulations to understand the mechanisms of ion and water transport across polymeric membranes. Additionally, we discuss the reliability of molecular models in mimicking the structure and chemistry of nanochannels and transport pathways in polymeric membranes. We conclude by providing research directions for resolving key knowledge gaps related to transport phenomena in polymeric membranes and for the construction of structure-property-performance relationships for the design of next-generation membranes.
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Affiliation(s)
- Mohammad Heiranian
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Ryan M DuChanois
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Cody L Ritt
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Camille Violet
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
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10
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Song X, Teuler JM, Guiga W, Fargues C, Rousseau B. Molecular simulation of a reverse osmosis polyamide membrane layer. In silico synthesis using different reactant concentration ratios. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Liu S, Ganti-Agrawal S, Keten S, Lueptow RM. Molecular insights into charged nanofiltration membranes: Structure, water transport, and water diffusion. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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13
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Qin Y, Kang G, Cao Y. Finely tuned polyamide structure with green plasticizers to construct ultrafast water channels for effective desalination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 784:147089. [PMID: 33901955 DOI: 10.1016/j.scitotenv.2021.147089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
Highly permeable reverse osmosis (RO) membranes are desirable for alleviating the energy burden and ensuring future water sustainability. Herein, the effectiveness of green plasticizer-assisted interfacial polymerization (GPAIP) for preparing polyamide thin-film composite (TFC) RO membranes with significantly enhanced water permeability was demonstrated. The presence of green citrate plasticizers, namely tributyl citrate (TBC) or acetyl tributyl citrate (ATBC), led to the formation of new hydrogen bonds and inhibited the formation of the initial interchain amide-amide bonding, thus markedly reducing chain rigidity as demonstrated by the decreased elasticity modulus. More flexible polyamide chains resulted in the creation of more ultrafast water channels during filtration. Furthermore, TBC-modified membranes exhibited more elastic polyamide layers and higher water flux than that of ATBC-modified membranes on account of the presence of both hydrogen bond acceptors (OH) and hydrogen bond donors (C=O) in TBC molecules. Specifically, water flux of 0.6 wt% TBC-modified and 0.6 wt% ATBC-modified membranes was 83.6 L m-2 h-1 and 49.7 L m-2 h-1 respectively, more than 5 times and 3 times that of the pristine membrane. The excellent performance of TFC RO membranes fabricated via GPAIP together with the facile membrane manufacturing process offered the possibility of breaking the predicament in desalination field, which could eventually help ease the current freshwater crisis.
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Affiliation(s)
- Yitian Qin
- Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guodong Kang
- Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Yiming Cao
- Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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14
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Wu HC, Yoshioka T, Nakagawa K, Shintani T, Matsuyama H. Water Transport and Ion Diffusion Investigation of an Amphotericin B-Based Channel Applied to Forward Osmosis: A Simulation Study. MEMBRANES 2021; 11:membranes11090646. [PMID: 34564464 PMCID: PMC8467697 DOI: 10.3390/membranes11090646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/13/2021] [Accepted: 08/18/2021] [Indexed: 11/17/2022]
Abstract
The use of an Amphotericin B_Ergosterol (AmBEr) channel as an artificial water channel in forward osmosis filtration (FO) was studied via molecular dynamics (MD) simulation. Three channel models were constructed: a common AmBEr channel and two modified C3deOAmB_Ergosterol (C3deOAmBEr) channels with different diameters (12 Å and 18 Å). During FO filtration simulation, the osmotic pressure of salt-water was a driving force for water permeation. We examined the effect of the modified C3deOAmBEr channel on the water transport performance. By tracing the change of the number of water molecules along with simulation time in the saltwater region, the water permeability of the channel models could be calculated. A higher water permeability was observed for a modified C3deOAmBEr channel, and there was no ion permeation during the entire simulation period. The hydrated ions and water molecules were placed into the channel to explore the ion leakage behavior of the channels. The mean squared displacement (MSD) of ions and water molecules was obtained to study the ion leakage performance. The Amphotericin B-based channels showed excellent selectivity of water molecules against ions. The results obtained on an atomistic scale could assist in determining the properties and the optimal filtration applications for Amphotericin B-based channels.
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Affiliation(s)
- Hao-Chen Wu
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; (H.-C.W.); (K.N.); (T.S.); (H.M.)
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Tomohisa Yoshioka
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; (H.-C.W.); (K.N.); (T.S.); (H.M.)
- Graduate School of Science, Technology, and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
- Correspondence: ; Tel.: +81-78-803-6299
| | - Keizo Nakagawa
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; (H.-C.W.); (K.N.); (T.S.); (H.M.)
- Graduate School of Science, Technology, and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Takuji Shintani
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; (H.-C.W.); (K.N.); (T.S.); (H.M.)
- Graduate School of Science, Technology, and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Hideto Matsuyama
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan; (H.-C.W.); (K.N.); (T.S.); (H.M.)
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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Chen E, Jia L, Chen C, Huang F, Zhang L. Understanding the transport mechanism of seawater through FMOF-1 and its derivative via molecular dynamics simulation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115209] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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16
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Qin Y, Zhu Z, Kang G, Yu H, Cao Y. Plasticizer-assisted interfacial polymerization for fabricating advanced reverse osmosis membranes. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118788] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Culp TE, Khara B, Brickey KP, Geitner M, Zimudzi TJ, Wilbur JD, Jons SD, Roy A, Paul M, Ganapathysubramanian B, Zydney AL, Kumar M, Gomez ED. Nanoscale control of internal inhomogeneity enhances water transport in desalination membranes. Science 2021; 371:72-75. [DOI: 10.1126/science.abb8518] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 11/03/2020] [Indexed: 01/03/2023]
Affiliation(s)
- Tyler E. Culp
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Biswajit Khara
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
| | - Kaitlyn P. Brickey
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Michael Geitner
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Tawanda J. Zimudzi
- Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
| | | | | | - Abhishek Roy
- The Dow Chemical Company, Freeport, TX 77541, USA
| | - Mou Paul
- The Dow Chemical Company, Lake Jackson, TX 77566, USA
| | | | - Andrew L. Zydney
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Manish Kumar
- Department of Civil, Architectural and Environmental Engineering, University of Texas, Austin, TX 78712, USA
| | - Enrique D. Gomez
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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18
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Cruz-Silva R, Izu K, Maeda J, Saito S, Morelos-Gomez A, Aguilar C, Takizawa Y, Yamanaka A, Tejiima S, Fujisawa K, Takeuchi K, Hayashi T, Noguchi T, Isogai A, Endo M. Nanocomposite desalination membranes made of aromatic polyamide with cellulose nanofibers: synthesis, performance, and water diffusion study. NANOSCALE 2020; 12:19628-19637. [PMID: 32627791 DOI: 10.1039/d0nr02915g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Reverse osmosis membranes of aromatic polyamide (PA) reinforced with a crystalline cellulose nanofiber (CNF) were synthesized and their desalination performance was studied. Comparison with plain PA membranes shows that the addition of CNF reduced the matrix mobility resulting in a molecularly stiffer membrane because of the attractive forces between the surface of the CNFs and the PA matrix. Fourier transform-infrared spectroscopy and X-ray photoelectron spectroscopy results showed complex formation between the carboxy groups of the CNF surface and the m- phenylenediamine monomer in the CNF-PA composite. Molecular dynamics simulations showed that the CNF-PA had higher hydrophilicity which was key for the higher water permeability of the synthesized nanocomposite membrane. The CNF-PA reverse osmosis nanocomposite membranes also showed enhanced antifouling performance and improved chlorine resistance. Therefore, CNF shows great potential as a nanoreinforcing material towards the preparation of nanocomposite aromatic PA membranes with longer operation lifetime due to its antifouling and chlorine resistance properties.
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Affiliation(s)
- Rodolfo Cruz-Silva
- Research Initiative for Supra-Materials, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-city 380-8553, Japan.
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19
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Freger V. Ion partitioning and permeation in charged low-T* membranes. Adv Colloid Interface Sci 2020; 277:102107. [PMID: 32000110 DOI: 10.1016/j.cis.2020.102107] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 11/25/2022]
Abstract
Understanding ion transport in membrane materials is key to engineering and development of desalination and water purification technologies as well as electro-membrane applications. To date, modeling of ion transport has mainly relied on mean-field approaches, originally intended for weak inter-ionic interactions, i.e., high reduced temperature T*. This condition is violated in many membranes, which could explain disagreement between predicted trends and experiments. The paper highlights observed discrepancies and develops a new approach based on the concept of ion association, more adequate in the low-T⁎ limit. The new model addresses ion binding and mobility consistently within the same physical picture, applied to different types of single and mixed salts. The resulting relations show a significantly weaker connection between ion partitioning and permeability than the standard ones. Estimates using primitive model (PM) of ions in a homogeneous dielectric suggest that non-PM mechanisms, originating from the molecular structure of the ion-solvating environment, might enhance ion association in membranes. PM analysis also predicts that ion solvation and association must be rigidly related, yet non-PM effects may decouple these phenomena and allow a crossover to non-trivial regimes consistent with experiments and simulations. Despite the crude nature of the presented approach and some questions remaining open, it appears to explain most available experimental data and presents a step towards predictive modeling of ion-selective membrane separations in water-, environment- and energy-related applications.
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21
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Gu QA, Li K, Li S, Cui R, Liu L, Yu C, Wang Y, Zhou Y, Xiao G. In silico study of structure and water dynamics in CNT/polyamide nanocomposite reverse osmosis membranes. Phys Chem Chem Phys 2020; 22:22324-22331. [DOI: 10.1039/d0cp03864d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comprehensive understanding of the role of CNTs in the reverse osmosis process is disclosed through in silico study.
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Affiliation(s)
- Qi-an Gu
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Ke Li
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Shanlong Li
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Rui Cui
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Lifen Liu
- Centre for Membrane and Water Science & Technology
- Ocean College
- Zhejiang University of Technology
- Hangzhou
- China
| | - Chunyang Yu
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Yuling Wang
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Yongfeng Zhou
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Guyu Xiao
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
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22
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Bahamon D, Vega LF. Molecular simulations of phenol and ibuprofen removal from water using multilayered graphene oxide membranes. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1662129] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- D. Bahamon
- Chemical Engineering Department, Khalifa University, Abu Dhabi, UAE
- Research and Innovation Center on CO2 and H2 (RICH), Catalysis and Separation Center (CeCaS), Khalifa University, Abu Dhabi, UAE
| | - L. F. Vega
- Chemical Engineering Department, Khalifa University, Abu Dhabi, UAE
- Research and Innovation Center on CO2 and H2 (RICH), Catalysis and Separation Center (CeCaS), Khalifa University, Abu Dhabi, UAE
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23
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Li K, Li S, Huang W, Yu C, Zhou Y. MembrFactory: A Force Field and composition Double Independent Universal Tool for Constructing Polyamide Reverse Osmosis Membranes. J Comput Chem 2019; 40:2432-2438. [DOI: 10.1002/jcc.26015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/31/2019] [Accepted: 06/03/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Ke Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University 800 Dongchuan Road, Shanghai, 200240 China
| | - Shanlong Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University 800 Dongchuan Road, Shanghai, 200240 China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University 800 Dongchuan Road, Shanghai, 200240 China
| | - Chunyang Yu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University 800 Dongchuan Road, Shanghai, 200240 China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University 800 Dongchuan Road, Shanghai, 200240 China
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24
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Zhang H, Wu MS, Zhou K, Law AWK. Molecular Insights into the Composition-Structure-Property Relationships of Polyamide Thin Films for Reverse Osmosis Desalination. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6374-6382. [PMID: 31079458 DOI: 10.1021/acs.est.9b02214] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A molecular-level understanding of the structure-property relationship of polyamide (PA) active layers in thin-film-composite membranes remains unclear. We developed an approach to build and hydrate the PA layer in molecular dynamics simulations and reproduced realistic membrane properties, which enabled us to examine the composition-structure-permeability relationships at the molecular level. We discovered the variation of pore size distributions in the dry PA structures at different monomer compositions, leading to different water cluster distributions and wetting properties of hydrated PA films. Membrane swelling was linearly dependent on the degree of cross-linking (DC), and higher water flux was obtained in the more swelling-prone PA films because of the transition in water transport mechanisms. Continuum-like and jumping transport both occurred in PA films with smaller DC, where visible and more persistent channels existed. In the denser films, water molecules relied only on the on-and-off channels to jump from one cavity to another; however, jumping transport was more pronounced even in the less dense PA films, and all the PA structures exhibited oscillations, which provided evidence for the solution-diffusion model rather than the pore-flow model. The results not only contribute to fundamental understanding but also provide insights into the molecule-level design for next-generation membranes.
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Affiliation(s)
- Hui Zhang
- Environment Process Modelling Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , 1 CleanTech Loop , Singapore 637141
| | - Mao See Wu
- School of Mechanical and Aerospace Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798
| | - Kun Zhou
- Environment Process Modelling Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , 1 CleanTech Loop , Singapore 637141
- School of Mechanical and Aerospace Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798
| | - Adrian Wing-Keung Law
- Environment Process Modelling Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , 1 CleanTech Loop , Singapore 637141
- School of Civil and Environmental Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798
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25
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Cui F, Chen W, Kong X, Liu L, Shi C, Li Y. Anomalous Dynamics of Water in Polyamide Matrix. J Phys Chem B 2019; 123:3086-3095. [PMID: 30879304 DOI: 10.1021/acs.jpcb.9b01491] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Water in polymer matrixes is likely to show anomalous dynamics, a problem that has not been well understood yet. Here, we performed atomistic molecular dynamics simulations to study the water dynamics in a polyamide (PA) matrix, the bulk phase of well-known reverse osmosis membranes. For time-dependent ensemble average, water molecules experienced ballistic diffusion at a shorter time scale, followed by a crossover from subdiffusion to Brownian diffusion at a time scale ∼10 ns, and non-Gaussian diffusion, an indication of anomalous dynamics, sticks on even in the Brownian diffusion region. The anomalous dynamics mainly originates from two distinct motions including small-step continuous diffusion and jumping diffusion. The jumping motion has a mean length of 3.08 ± 0.31 Å and characteristic relaxation time of 0.218 ± 0.040 ns, which dominates the water diffusion in a fully hydrated PA matrix. It comprised low- and high-frequency jumps; the former is almost unchanged, and the latter remarkably increases with the increase of the hydration level. Surrounding neighbors of water strongly affect the jumping frequency, which exponentially or linearly decays with the increase in the number of atoms from the PA matrix. Although the PA matrix is flexible, associated with the water dynamics, the translocation of water is mainly through either tracing the position of neighboring water or jumping into the adjacent accommodation space.
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Affiliation(s)
- Fengchao Cui
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Wenduo Chen
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China.,School of Materials , Sun Yat-Sen University , 135 Xingang West , Guangzhou 510275 , P. R. China
| | - Xiangxin Kong
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Lunyang Liu
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Ce Shi
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Yunqi Li
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials , Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Sciences , Changchun 130022 , P. R. China
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26
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Li K, Li S, Liu L, Huang W, Wang Y, Yu C, Zhou Y. Molecular dynamics simulation studies of the structure and antifouling performance of a gradient polyamide membrane. Phys Chem Chem Phys 2019; 21:19995-20002. [DOI: 10.1039/c9cp03798e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure and the antifouling performance of the first gradient polyamide layer model are systematically disclosed using molecular dynamics simulations.
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Affiliation(s)
- Ke Li
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Shanlong Li
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Lifen Liu
- Center for Membrane and Water Science & Technology
- Ocean College, Zhejiang University of Technology
- Hangzhou
- China
| | - Wei Huang
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Yuling Wang
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Chunyang Yu
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
| | - Yongfeng Zhou
- School of Chemistry & Chemical Engineering
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
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27
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Jafarzadeh R, Azamat J, Erfan-Niya H. Fluorine-functionalized nanoporous graphene as an effective membrane for water desalination. Struct Chem 2018. [DOI: 10.1007/s11224-018-1162-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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28
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Zhang N, Chen S, Yang B, Huo J, Zhang X, Bao J, Ruan X, He G. Effect of Hydrogen-Bonding Interaction on the Arrangement and Dynamics of Water Confined in a Polyamide Membrane: A Molecular Dynamics Simulation. J Phys Chem B 2018; 122:4719-4728. [DOI: 10.1021/acs.jpcb.7b12790] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ning Zhang
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Shaomin Chen
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Boyun Yang
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Jun Huo
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xiaopeng Zhang
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Junjiang Bao
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xuehua Ruan
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Gaohong He
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
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29
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Li K, Liu L, Wu H, Li S, Yu C, Zhou Y, Huang W, Yan D. Understanding the temperature effect on transport dynamics and structures in polyamide reverse osmosis system via molecular dynamics simulations. Phys Chem Chem Phys 2018; 20:29996-30005. [DOI: 10.1039/c8cp05825c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Molecular simulations could disclose the transport dynamics, membrane structures and temperature effect on reverse osmosis process.
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Affiliation(s)
- Ke Li
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
| | - Lifen Liu
- Center for Membrane and Water Science & Technology, Ocean College, Zhejiang University of Technology
- Hangzhou
- China
| | - Hao Wu
- Center for Membrane and Water Science & Technology, Ocean College, Zhejiang University of Technology
- Hangzhou
- China
| | - Shanlong Li
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
| | - Chunyang Yu
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
| | - Yongfeng Zhou
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
| | - Wei Huang
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
| | - Deyue Yan
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University
- Shanghai
- China
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30
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Yasoshima N, Fukuoka M, Kitano H, Kagaya S, Ishiyama T, Gemmei-Ide M. Diffusion-Controlled Recrystallization of Water Sorbed into Poly(meth)acrylates Revealed by Variable-Temperature Mid-Infrared Spectroscopy and Molecular Dynamics Simulation. J Phys Chem B 2017; 121:5133-5141. [DOI: 10.1021/acs.jpcb.7b01824] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nobuhiro Yasoshima
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Mizuki Fukuoka
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Hiromi Kitano
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
- Institute for Polymer-Water Interfaces, 84 Fukujima, Yatsuo, Toyama 939-2376, Japan
| | - Shigehiro Kagaya
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Tatsuya Ishiyama
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Makoto Gemmei-Ide
- Department
of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
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31
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Multiscale molecular simulations of the formation and structure of polyamide membranes created by interfacial polymerization. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.11.024] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Song Y, Xu F, Wei M, Wang Y. Water Flow inside Polamide Reverse Osmosis Membranes: A Non-Equilibrium Molecular Dynamics Study. J Phys Chem B 2017; 121:1715-1722. [DOI: 10.1021/acs.jpcb.6b11536] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yang Song
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Fang Xu
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Mingjie Wei
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Yong Wang
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
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33
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Ridgway HF, Orbell J, Gray S. Molecular simulations of polyamide membrane materials used in desalination and water reuse applications: Recent developments and future prospects. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.11.061] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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A probabilistic approach for estimating water permeability in pressure-driven membranes. J Mol Model 2016; 22:185. [PMID: 27444876 DOI: 10.1007/s00894-016-3049-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 06/20/2016] [Indexed: 10/21/2022]
Abstract
A probabilistic approach is proposed to estimate water permeability in a cellulose triacetate (CTA) membrane. Water transport across the membrane is simulated in reverse osmosis mode by means of non-equilibrium molecular dynamics (MD) simulations. Different membrane configurations obtained by an annealing MD simulation are considered and simulation results are analyzed by using a hierarchical Bayesian model to obtain the permeability of the different membranes. The estimated membrane permeability is used to predict full-scale water flux by means of a process-level Monte Carlo simulation. Based on the results, the parameters of the model are observed to converge within 5-ns total simulation time. The results also indicate that the use of unique structural configurations in MD simulations is essential to capture realistic membrane properties at the molecular scale. Furthermore, the predicted full-scale water flux based on the estimated permeability is within the same order of magnitude of bench-scale experimental measurement of 1.72×10(-5) m/s.
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35
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Shen M, Keten S, Lueptow RM. Rejection mechanisms for contaminants in polyamide reverse osmosis membranes. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.02.043] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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Shen M, Keten S, Lueptow RM. Dynamics of water and solute transport in polymeric reverse osmosis membranes via molecular dynamics simulations. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.01.051] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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38
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Wang L, Dumont RS, Dickson JM. Molecular dynamic simulations of pressure-driven water transport through polyamide nanofiltration membranes at different membrane densities. RSC Adv 2016. [DOI: 10.1039/c6ra12115b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The amorphous aromatic polyamide membranes with different membrane densities were modeled to study the porous structure of free-volume pores and the pressure-driven water transport by using molecular dynamics simulations.
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Affiliation(s)
- Luying Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing
- China
| | | | - James M. Dickson
- Department of Chemistry & Chemical Biology
- McMaster University
- Hamilton
- Canada
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39
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Lin L, Lopez R, Ramon GZ, Coronell O. Investigating the void structure of the polyamide active layers of thin-film composite membranes. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.09.020] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Gupta KM, Zhang K, Jiang J. Water Desalination through Zeolitic Imidazolate Framework Membranes: Significant Role of Functional Groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13230-13237. [PMID: 26588699 DOI: 10.1021/acs.langmuir.5b03593] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A molecular simulation study is reported for water desalination through five zeolitic imidazolate framework (ZIF) membranes, namely ZIF-25, -71, -93, -96, and -97. The five ZIFs possess identical rho-topology but differ in functional groups. The rejection of salt (NaCl) is found to be around 97% in ZIF-25, and 100% in the other four ZIFs. The permeance ranges from 27 to 710 kg/(m(2)·h·bar), about one∼two orders of magnitude higher compared with commercial reverse osmosis membranes. Due to a larger aperture size da, ZIF-25, -71, and -96 exhibit a much higher water flux than ZIF-93 and -97; however, the flux in ZIF-25, -71, and -96 is governed by the polarity of functional group rather than da. With the hydrophobic CH3 group, ZIF-25 has the highest flux despite the smallest da among ZIF-25, -71, and -96. The lifetime of hydrogen bonding in ZIF-25 is shorter than that in ZIF-71 and -96. Furthermore, water molecules undergo a fast flushing motion in ZIF-25, but frequent jumping in ZIF-96 and particularly in ZIF-97. An Arrhenius-type relationship is found between water flux in ZIF-25 and temperature, and the activation energy is predicted to be 6.5 kJ/mol. This simulation study provides a microscopic insight into water desalination in a series of ZIFs, reveals the key factors (aperture size and polarity of functional group) governing water flux, and suggests that ZIF-25 might be an interesting reverse osmosis membrane for high-performance water desalination.
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Affiliation(s)
- Krishna M Gupta
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 117576, Singapore
| | - Kang Zhang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 117576, Singapore
| | - Jianwen Jiang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 117576, Singapore
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41
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Araki T, Cruz-Silva R, Tejima S, Takeuchi K, Hayashi T, Inukai S, Noguchi T, Tanioka A, Kawaguchi T, Terrones M, Endo M. Molecular Dynamics Study of Carbon Nanotubes/Polyamide Reverse Osmosis Membranes: Polymerization, Structure, and Hydration. ACS APPLIED MATERIALS & INTERFACES 2015; 7:24566-24575. [PMID: 26505521 DOI: 10.1021/acsami.5b06248] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Carbon nanotubes/polyamide (PA) nanocomposite thin films have become very attractive as reverse osmosis (RO) membranes. In this work, we used molecular dynamics to simulate the influence of single walled carbon nanotubes (SWCNTs) in the polyamide molecular structure as a model case of a carbon nanotubes/polyamide nanocomposite RO membrane. It was found that the addition of SWCNTs decreases the pore size of the composite membrane and increases the Na and Cl ion rejection. Analysis of the radial distribution function of water confined in the pores of the membranes shows that SWCNT+PA nanocomposite membranes also exhibit smaller clusters of water molecules within the membrane, thus suggesting a dense membrane structure (SWCNT+PA composite membranes were 3.9% denser than bare PA). The results provide new insights into the fabrication of novel membranes reinforced with tubular structures for enhanced desalination performance.
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Affiliation(s)
- Takumi Araki
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Research Organization for Information Science & Technology , 2-32-3, Kitashinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
| | - Rodolfo Cruz-Silva
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Syogo Tejima
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Research Organization for Information Science & Technology , 2-32-3, Kitashinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
| | - Kenji Takeuchi
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Takuya Hayashi
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Shigeki Inukai
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Toru Noguchi
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Akihiko Tanioka
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Takeyuki Kawaguchi
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Mauricio Terrones
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Department of Physics, Chemistry and Materials Science and Engineering, and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University ; University Park, Pennsylvania 16802, United States
| | - Morinobu Endo
- Global Aqua Innovation Center, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
- Institute of Carbon Science and Technology, Shinshu University ; 4-17-1 Wakasato, Nagano 380-8553, Japan
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Kolev V, Freger V. Molecular Dynamics Investigation of Ion Sorption and Permeation in Desalination Membranes. J Phys Chem B 2015; 119:14168-79. [DOI: 10.1021/acs.jpcb.5b06566] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vesselin Kolev
- Wolfson Department of Chemical
Engineering, Technion, Haifa 32000, Israel
| | - Viatcheslav Freger
- Wolfson Department of Chemical
Engineering, Technion, Haifa 32000, Israel
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Kulasinski K, Guyer R, Derome D, Carmeliet J. Water diffusion in amorphous hydrophilic systems: a stop and go process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10843-10849. [PMID: 26390260 DOI: 10.1021/acs.langmuir.5b03122] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The diffusion of H2O in three amorphous polymer-H2O systems is studied as a function of H2O content using molecular dynamics. A picture of H2O molecule motion comprising alternating steps of being bound at an adsorption site ("stop") and moving ("go") emerges. This picture is made quantitative. The bound time, frequency of stop-go steps, and tortuosity all decrease with H2O content. Fourier analysis of particle motion during bound time segments provides a measure of an attempt frequency that is connected quantitatively to the bound time and an activation energy of a hydrogen bond. For increasing H2O content, the polymer-H2O systems swell, leading to an increase in the diffusion coefficient and porosity and a decrease in activation energy.
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Affiliation(s)
- Karol Kulasinski
- Chair of Building Physics, Swiss Federal University of Technology ETH Zurich , Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Robert Guyer
- Solid Earth Geophysics Group, Los Alamos National Laboratory , MS D446, Los Alamos, New Mexico 87545, United States
- Department of Physics, University of Nevada , Reno, Nevada 89557, United States
| | - Dominique Derome
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Jan Carmeliet
- Chair of Building Physics, Swiss Federal University of Technology ETH Zurich , Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
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44
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Understanding water and ion transport behaviour and permeability through poly(amide) thin film composite membrane. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.03.052] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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45
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Structure and dynamics of water confined in a polyamide reverse-osmosis membrane: A molecular-simulation study. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.01.054] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Kolev V, Freger V. Hydration, porosity and water dynamics in the polyamide layer of reverse osmosis membranes: A molecular dynamics study. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.12.045] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Xiang Y, Liu Y, Mi B, Leng Y. Hydrated polyamide membrane and its interaction with alginate: a molecular dynamics study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11600-11608. [PMID: 23941557 DOI: 10.1021/la401442r] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The properties of the hydrated amorphous polyamide (PA) membrane and its binding with alginate are investigated through molecular dynamics simulations. The density of the hydrated membrane, surface morphology, and water diffusion near and inside the membrane are compared to other studies. Particular focus is given to the steered molecular dynamics (SMD) simulation of the binding between the PA membrane and an alginate model. The PA surface composition is determined on the basis of experimental measurements of the oxygen/nitrogen (O/N) ratio. The surface model is built using a configurational-bias Monte Carlo technique. The consistent valence force field (CVFF) is used to describe the atomic interactions in the membrane-foulant system. Simulation results show that the carboxylate groups in both the PA surface and alginate exhibit strong binding with metal ions. This binding mechanism plays a major role in the PA-alginate fouling through the formation of an ionic binding bridge. Specifically, Ca(2+) ions have stronger binding with the carboxylate group than Na(+) ions, while the binding breakdown time is shorter for Ca(2+) than Na(+) because of the comparably higher hydration free energy of Ca(2+) ions with water molecules.
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Affiliation(s)
- Yuan Xiang
- Department of Mechanical and Aerospace Engineering, The George Washington University , Washington, District of Columbia 20052, United States
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48
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Ebro H, Kim YM, Kim JH. Molecular dynamics simulations in membrane-based water treatment processes: A systematic overview. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.03.027] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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49
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Computer simulations of water flux and salt permeability of the reverse osmosis FT-30 aromatic polyamide membrane. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.08.057] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Shanks R, Pavel D. Simulation of diffusion of O 2 and CO 2 in amorphous poly(ethylene terephthalate) and related alkylene and isomeric polyesters. MOLECULAR SIMULATION 2010. [DOI: 10.1080/089270204000002593] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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