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

  • Yurong Zhang
  • Xiaoguang Ge
  • Chengji Zhao
  • Hui NaEmail author
Article
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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 Im-PAES-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 °C) 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 i ntroduce appropriate length of alkyl side chains into anion exchange membranes(AEMs) to improve the performance.

Keywords

Comb-shaped structure Imidazolium functionalized poly(arylene ether sulfone) Alkaline stability Membrane 

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Copyright information

© Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yurong Zhang
    • 1
  • Xiaoguang Ge
    • 1
  • Chengji Zhao
    • 1
  • Hui Na
    • 1
    Email author
  1. 1.Alan G. MacDiarmid Institute, College of ChemistryJilin UniversityChangchunP. R. China

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