Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux

被引：13
作者：
Yang, Jin [1 ]
Chen, Qian [1 ]
Afsar, Noor Ul [1 ]
Ge, Liang [1 ,2 ]
Xu, Tongwen [1 ]
机构：
[1] Univ Sci & Technol China, Sch Chem & Mat Sci, Dept Appl Chem, Anhui Prov Engn Lab Funct Membrane Mat & Technol, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Inst Adv Technol, Appl Engn Technol Res Ctr Funct Membranes, Hefei 230088, Peoples R China
来源：
MEMBRANES | 2023年 / 13卷 / 02期
基金：
中国国家自然科学基金;
关键词：
anion exchange membrane; monovalent anion permselective membrane; hydrophobicity; electrodialysis; permselectivity; ELECTRODIALYSIS; SELECTIVITY; LAYER;
D O I：
10.3390/membranes13020188
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Poly(alkyl-biphenyl pyridinium)-based anion exchange membranes with alkyl side chains were synthesized for permselective anion separation. By altering the length of the grafted side chain, the hydrophilicity and other attributes of the membranes could be controlled. The QDPAB-C5 membrane with the best comprehensive performance exhibited a Cl- ion flux of 3.72 mol m(-2) h(-1) and a Cl-/SO42- permselectivity of 15, which are significantly better than the commercial Neosepta ACS membrane. The QDPAB-C5 membranes with distinct microscopic phase separation structures formed interconnected hydrophilic/hydrophobic ion channels and exhibited excellent ion flux and permselectivity for other anionic systems (NO3-/SO42-, Br-/SO42-, F-/SO42-, NO3-/Cl-, Br-/Cl-, and F-/Cl-) as well. Furthermore, the influence of alkyl side chain length on the membranes' ion flux and permselectivity in electrodialysis was investigated, which may be attributed to the alterations in ion channels and hydrophobic regions of the membranes. This work provides an effective strategy for the development of monovalent anion permselective membranes.
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页数：12
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