Imidazolium-functionalized poly(arylene ether sulfone) block copolymer as an anion exchange membrane for alkaline fuel cell

Anil H.N. Rao, Roshni Lilly Thankamony, Hyoung Juhn Kim, Sukwoo Nam, Tae Hyun Kim

Research output: Contribution to journalArticlepeer-review

105 Citations (Scopus)


An ethyl imidazolium-functionalized poly(arylene ether sulfone) (EI-PES) block copolymer was prepared as a novel anion exchange membrane. The EI-PES polymer was synthesized by polycondensation between the F- and OH-terminated oligomers, followed by benzylic bromination and imidazolium functionalization (homogeneous functionalization). The quaternary ammonium-functionalized PES (QA-PES) was also prepared by heterogeneous functionalization, and the properties were compared with EI-PES. The membrane obtained from EI-PES showed a well-defined phase separated morphology between hydrophobic and hydrophilic ionic units of the block copolymer. An IEC of 1.45 meq/g with hydroxide conductivity of 0.03 S/cm at r.t. was observed for EI-PES. The EI-PES membrane also displayed excellent dimensional, thermal, mechanical and chemical stabilities.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
Issue number1
Publication statusPublished - 2013 Jan 8

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant, funded by the Korean government (MEST) ( 2011-0022859 ). Part of this work was also supported by a research grant from the Korea Institute of Science and Technology as a part of the “E-BANK” program in 2012.


  • Anion exchange membrane
  • Block copolymer
  • Imidazolium-functionalized polymer

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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