Anion exchange membranes have aroused much interest for use in electrolyzers and alkaline fuel cells. In this work, two double-charged anion exchange membranes based on poly(2,5-benzimidazole) and poly(vinylbenzyl chloride) prepared by the casting method are reported. The effect of two different quaternizing agents based on 1,4-diazabicyclo[2.2.2]octane (DABCO) was evaluated. These membranes were characterized by means of Fourier transform infrared spectroscopy, SEM, TGA, water contact angle, swelling ratio, KOH and water uptake, ionic exchange capacity and ionic conductivity. The results showed that the length of the alkyl chain has a strong effect on the membrane properties. A good performance in a zero-gap water alkaline electrolyzer was obtained for the membrane based on the butyl derivate of DABCO (BDABCO). © 2023 Society of Industrial Chemistry.

中文翻译：

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阴离子交换膜中新型1,4-二氮杂双环[2.2.2]辛烷衍生物的合成、表征和性能


阴离子交换膜在电解槽和碱性燃料电池中的应用引起了人们的广泛兴趣。在这项工作中，报道了两种通过浇铸法制备的基于聚(2,5-苯并咪唑)和聚(乙烯基苄基氯)的双电荷阴离子交换膜。评估了基于 1,4-二氮杂双环[2.2.2]辛烷 (DABCO) 的两种不同季铵化剂的效果。通过傅里叶变换红外光谱、SEM、TGA、水接触角、溶胀比、KOH和吸水率、离子交换容量和离子电导率对这些膜进行了表征。结果表明，烷基链的长度对膜性能有很大影响。基于DABCO丁基衍生物(BDABCO)的膜在零间隙水碱性电解槽中获得了良好的性能。 © 2023 工业化学学会。