Polybenzimidazoles with Pendant Quaternary Ammonium Groups as Anion Exchange Membranes: Synthesis, Characterization and Alkaline Stability
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ABSTRACTA 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.
2017 ◽
Vol 164
(12)
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pp. F1051-F1062
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2015 ◽
Vol 3
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pp. 5280-5284
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2018 ◽
Vol 6
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pp. 16537-16547
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2016 ◽
Vol 4
(43)
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pp. 17138-17153
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2016 ◽
Vol 4
(36)
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pp. 13938-13948
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2020 ◽
Vol 152
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pp. 104576
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