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Cheng Z, Li S, Tocci E, Saielli G, Gugliuzza A, Wang Y. Pathway for Water Transport through Breathable Nanocomposite Membranes of PEBAX with Ionic Liquid [C 12C 1im]Cl. MEMBRANES 2023; 13:749. [PMID: 37755171 PMCID: PMC10537744 DOI: 10.3390/membranes13090749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 09/28/2023]
Abstract
Water transport through membranes is an attractive topic among the research dedicated to dehydration processes, microenvironment regulation, or more simply, recovery of freshwater. Herein, an atomistic computer simulation is proposed to provide new insights about a water vapor transport mechanism through PEBAX membranes filled with ionic liquid (IL) [C12C1im]Cl. Starting from experimental evidence that indicates an effective increase in water permeation as the IL is added to the polymer matrix (e.g., up to 85·10-3 (g·m)/(m2·day) at 318.15 K for PEBAX@2533 membranes loaded with 70% of IL), molecular dynamics simulations are proposed to explore the key role of IL in water transport inside membranes. The polar region composed of anions and cationic head groups of the IL is demonstrated to serve as the pathway for water transport through the membrane. Water molecules always stay near the pathway, which becomes wider and thus has a larger water-accessible area with increasing IL concentration. Hence, the diffusion coefficients of water molecules and ions increase as the IL concentration increases. The simulation provides useful indications about a microscopic mechanism that regulates the transport of water vapor through a kind of PEBAX/IL membrane, resulting in full agreement with the experimental evidence.
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Affiliation(s)
- Ziqi Cheng
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shen Li
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Elena Tocci
- National Research Council―Institute on Membrane Technology (CNR-ITM), Via Pietro Bucci 17C, 87036 Rende, Italy;
| | - Giacomo Saielli
- National Research Council―Institute on Membrane Technology (CNR-ITM), Unit of Padova, Via Marzolo, 1, 35131 Padova, Italy;
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131 Padova, Italy
| | - Annarosa Gugliuzza
- National Research Council―Institute on Membrane Technology (CNR-ITM), Via Pietro Bucci 17C, 87036 Rende, Italy;
| | - Yanting Wang
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Theoretical Interdisciplinary Sciences, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
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Kuo CP, Lin YS, Leung MK. Electrochemical fluorescence switching properties of conjugated polymers composed of triphenylamine, fluorene, and cyclic urea moieties. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26354] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Seo S, Kim Y, You J, Sarwade BD, Wadgaonkar PP, Menon SK, More AS, Kim E. Electrochemical Fluorescence Switching from a Patternable Poly(1,3,4-oxadiazole) Thin Film. Macromol Rapid Commun 2011; 32:637-43. [DOI: 10.1002/marc.201000791] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 01/29/2011] [Indexed: 11/11/2022]
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