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Polybenzimidazoles with Pendant Quaternary Ammonium Groups as Anion Exchange Membranes: Synthesis, Characterization and Alkaline Stability
Published online by Cambridge University Press: 20 May 2014
Abstract
A novel method for introducing quaternary ammonium-bearing side chains has been developed and applied to a polybenzimidazole backbone to generate new anionic-exchange polymers, TMHA-m-FPBI where m = the degree of substitution of available sites (values ranging from 74 to 100%). These polymers have been shown to exhibit hydroxide ion conductivities up to 34 mS cm-1 in hydrated membranes at ambient temperature and 13 mS cm-1 at 60 °C, RH = 95%. Immersion of these polymers in 2 M KOH at 60 °C has shown they remain stable with no sign of chemical structure degradation to a period of at least 15 days.
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- MRS Online Proceedings Library (OPL) , Volume 1677: Symposium M – Characterization of Energy Materials In-Situ and Operando , 2014 , mrss14-1677-m04-01
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- Copyright © Materials Research Society 2014
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