Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability

doi:10.1007/s40242-019-8199-1

高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (1): 150-156.doi: 10.1007/s40242-019-8199-1

Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability

ZHANG Yurong, GE Xiaoguang, ZHAO Chengji, NA Hui

Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, P. R. China

收稿日期:2018-06-19 修回日期:2018-10-12 出版日期:2019-02-01 发布日期:2018-12-21
通讯作者: NA Hui E-mail:huina@jlu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(No.21474036).

Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability

ZHANG Yurong, GE Xiaoguang, ZHAO Chengji, NA Hui

Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2018-06-19 Revised:2018-10-12 Online:2019-02-01 Published:2018-12-21
Contact: 10.1007/s40242-019-8199-1 E-mail:huina@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21474036).

摘要/Abstract

摘要： A series of comb-shaped poly (arylene ether sulfone)s containing pendant 2-methyl-3-alkylimidazolium group (ImPAES-Cx, x=1, 6, 10) was prepared and characterized as novel anion exchange membranes. These ImPAES-Cx membranes were obtained by benzylic bromination and imidazolium functionalization. The characteristic nano-phase separation structure was formed in membranes with longer alkyl side chains, as confirmed by small-angle X-ray scattering. The nano-phase separation structures endowed ImPAES-Cx membranes with improved ionic conductivity, dimensional stability (at least 60% decrease water uptake and swelling ratio at 60℃) and mechanical properties, together with excellent alkaline stability. Especially, ImPAES-C6 membranes possessed enhanced hydroxide conductivity and chemical stability simultaneously. These results suggest that it is a feasible strategy to introduce appropriate length of alkyl side chains into anion exchange membranes (AEMs) to improve the performance.

关键词: Comb-shaped structure, Imidazolium functionalized poly (arylene ether sulfone), Alkaline stability, Membrane

Abstract: A series of comb-shaped poly (arylene ether sulfone)s containing pendant 2-methyl-3-alkylimidazolium group (ImPAES-Cx, x=1, 6, 10) was prepared and characterized as novel anion exchange membranes. These ImPAES-Cx membranes were obtained by benzylic bromination and imidazolium functionalization. The characteristic nano-phase separation structure was formed in membranes with longer alkyl side chains, as confirmed by small-angle X-ray scattering. The nano-phase separation structures endowed ImPAES-Cx membranes with improved ionic conductivity, dimensional stability (at least 60% decrease water uptake and swelling ratio at 60℃) and mechanical properties, together with excellent alkaline stability. Especially, ImPAES-C6 membranes possessed enhanced hydroxide conductivity and chemical stability simultaneously. These results suggest that it is a feasible strategy to introduce appropriate length of alkyl side chains into anion exchange membranes (AEMs) to improve the performance.

Key words: Comb-shaped structure, Imidazolium functionalized poly (arylene ether sulfone), Alkaline stability, Membrane

ZHANG Yurong, GE Xiaoguang, ZHAO Chengji, NA Hui. Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability[J]. 高等学校化学研究, 2019, 35(1): 150-156.

ZHANG Yurong, GE Xiaoguang, ZHAO Chengji, NA Hui. Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability[J]. Chemical Research in Chinese Universities, 2019, 35(1): 150-156.

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Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability

Comb-shaped 2-Methylimidazolium Poly(arylene ether sulfone) Anion Exchange Membranes with High Alkaline Stability

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