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.
Bibliographical noteFunding 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).
© 2015 Elsevier Ltd. All rights reserved.
Copyright 2015 Elsevier B.V., All rights reserved.
- 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