Phosphoric acid doped polysulfone membranes with aminopyridine pendant groups and imidazole cross-links

Steffen Hink, Katrine Elsøe, Lars Nilausen Cleemann, Dirk Henkensmeier, Jong Hyun Jang, Hyoung Juhn Kim, Jonghee Han, Suk Woo Nam, Qingfeng Li

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Udel polysulfone based membranes with 4-aminopyridine pendant groups and cross-linking imidazole units are synthesized in a simple two step reaction. The ratio of 4-aminopyridine and imidazole is varied and the materials are extensively characterized. The average phosphoric acid uptake (in 85 wt% PA) ranges between 90 wt% and 452 wt% depending on the ratio of 4-aminopyridine and imidazole and the membranes show good proton conductivity of up to 65 mS cm-1 at 160 °C under non-humidified conditions. The applicability of these materials as a polymer electrolyte membrane was proven by single cell tests at 130 °C. The relationships between PA uptake, chemical composition and mechanical stability are reported. Proton conductivity and mechanical properties only depend on the phosphoric acid content, which, however is a function of the chemical composition.

Original languageEnglish
Pages (from-to)102-113
Number of pages12
JournalEuropean Polymer Journal
Publication statusPublished - 2015 Nov 15

Bibliographical note

Funding Information:
This work was supported by KIST K-GRL , the Innovation Fund Denmark in the frame of the 4M Centre and the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (2014, University-Institute cooperation program).

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.

Copyright 2015 Elsevier B.V., All rights reserved.


  • Aminopyridine
  • High temperature polymer electrolyte membrane fuel cell (HT-PEMFC)
  • Udel polysulfone

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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