Article ID Journal Published Year Pages File Type
1394723 European Polymer Journal 2015 12 Pages PDF
Abstract

•Aminopyridine tethered Udel can be doped with phosphoric acid.•Imidazole can be used as crosslinker.•Membrane properties depend on the phosphoric acid content.•Bisphenol A units degrade first, and future materials should use Radel backbones.

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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
Authors
, , , , , , , , ,