Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity

Developing monovalent cation permselective membranes (MCPMs) with high-efficient permselectivity is the core concern in specific industrial applications. In this work, we have fabricated a series of novel cation exchange membranes (CEMs) based on sulfonated polysulfone (SPSF) surface modification by...

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Autores principales: Yang, Shanshan, Yu, Shuaijun, Yu, Lu, Liu, Yuanwei, Liao, Junbin, Shen, Jiangnan, Gao, Congjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8151526/
https://www.ncbi.nlm.nih.gov/pubmed/34068766
http://dx.doi.org/10.3390/membranes11050351
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author Yang, Shanshan
Yu, Shuaijun
Yu, Lu
Liu, Yuanwei
Liao, Junbin
Shen, Jiangnan
Gao, Congjie
author_facet Yang, Shanshan
Yu, Shuaijun
Yu, Lu
Liu, Yuanwei
Liao, Junbin
Shen, Jiangnan
Gao, Congjie
author_sort Yang, Shanshan
collection PubMed
description Developing monovalent cation permselective membranes (MCPMs) with high-efficient permselectivity is the core concern in specific industrial applications. In this work, we have fabricated a series of novel cation exchange membranes (CEMs) based on sulfonated polysulfone (SPSF) surface modification by polyethyleneimine (PEI) and 4′-aminobenzo-12-crown-4 (12C4) codeposited with dopamine (DA) successively, which was followed by the cross-linking of glutaraldehyde (GA). The as-prepared membranes before and after modification were systematically characterized with regard to their structures as well as their physicochemical and electrochemical properties. Particularly, the codeposition sequence of modified ingredients was investigated on galvanostatic permselectivity to cations. The modified membrane (M-12C4-0.50-PEI) exhibits significantly prominent selectivity to Li(+) ions ([Formula: see text] = 5.23) and K(+) ions ([Formula: see text] = 13.56) in Li(+)/Mg(2+) and K(+)/Mg(2+) systems in electrodialysis (ED), which is far superior to the pristine membrane (M-0, [Formula: see text] = 0.46, [Formula: see text] = 1.23) at a constant current density of 5.0 mA·cm(−2). It possibly arises from the synergistic effects of electrostatic repulsion (positively charged PEI), pore-size sieving (distribution of modified ingredients), and specific interaction effect (12C4 ~Li(+)). This facile strategy may provide new insights into developing selective CEMs in the separation of specific cations by ED.
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spelling pubmed-81515262021-05-27 Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity Yang, Shanshan Yu, Shuaijun Yu, Lu Liu, Yuanwei Liao, Junbin Shen, Jiangnan Gao, Congjie Membranes (Basel) Article Developing monovalent cation permselective membranes (MCPMs) with high-efficient permselectivity is the core concern in specific industrial applications. In this work, we have fabricated a series of novel cation exchange membranes (CEMs) based on sulfonated polysulfone (SPSF) surface modification by polyethyleneimine (PEI) and 4′-aminobenzo-12-crown-4 (12C4) codeposited with dopamine (DA) successively, which was followed by the cross-linking of glutaraldehyde (GA). The as-prepared membranes before and after modification were systematically characterized with regard to their structures as well as their physicochemical and electrochemical properties. Particularly, the codeposition sequence of modified ingredients was investigated on galvanostatic permselectivity to cations. The modified membrane (M-12C4-0.50-PEI) exhibits significantly prominent selectivity to Li(+) ions ([Formula: see text] = 5.23) and K(+) ions ([Formula: see text] = 13.56) in Li(+)/Mg(2+) and K(+)/Mg(2+) systems in electrodialysis (ED), which is far superior to the pristine membrane (M-0, [Formula: see text] = 0.46, [Formula: see text] = 1.23) at a constant current density of 5.0 mA·cm(−2). It possibly arises from the synergistic effects of electrostatic repulsion (positively charged PEI), pore-size sieving (distribution of modified ingredients), and specific interaction effect (12C4 ~Li(+)). This facile strategy may provide new insights into developing selective CEMs in the separation of specific cations by ED. MDPI 2021-05-10 /pmc/articles/PMC8151526/ /pubmed/34068766 http://dx.doi.org/10.3390/membranes11050351 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Shanshan
Yu, Shuaijun
Yu, Lu
Liu, Yuanwei
Liao, Junbin
Shen, Jiangnan
Gao, Congjie
Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title_full Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title_fullStr Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title_full_unstemmed Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title_short Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity
title_sort cation exchange membranes coated with polyethyleneimine and crown ether to improve monovalent cation electrodialytic selectivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8151526/
https://www.ncbi.nlm.nih.gov/pubmed/34068766
http://dx.doi.org/10.3390/membranes11050351
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