膜科学与技术

SEBS远程接枝季铵阳离子阴离子交换膜的研究

作者：李京，李聪会，王芳辉

单位： 1. 北京开放大学科学技术学院，北京 100081 2. 北京化工大学化学学院，北京 100029；

关键词： SEBS；傅克酰基化；远程接枝；OH-传导率；耐碱性

出版年,卷(期):页码： 2023,43(2):95-103

摘要：

在氢化苯乙烯-丁二烯嵌段共聚物（SEBS)上通过傅克酰基化和羰基还原合成了纯度为95%的溴己基化SEBS聚合物（SEBS-C6-Br），再用三甲胺经过季铵化反应制备了SEBS-C6-TAM膜，对聚合及膜的结构和性能进行了表征。结果表明，SEBS-C6-TAM在80℃可达到110.4 mS/cm的OH-离子传导率，经过4 M NaOH溶液浸泡1800 h后，氢氧根离子传导率只降解14.72%。惊喜的是，制备溴己基化SEBS过程中降低了出现凝胶化的现象，为SEBS聚合物改性提供了另一种有效途径。

Bromohexylated SEBS polymer (SEBS-C6-Br) with a purity of 95% was obtained on hydrogenated styrene-butadiene block copolymer (SEBS) by trimethylamine acylation and carbonyl reduction. The SEBS-C6-TAM membrane was prepared by quaternization reaction with trimethylamine. The structure and properties of polymers and membranes were characterized. The results show that SEBS-C6-TAM can reach an OH-conductivity of 110.4 mS/cm at 80 °C, and after soaking in 4 M NaOH solution for 1800 h, the OH-conductivity is only degraded by 14.72%. The phenomenon of gelation was reduced during the preparation of bromohexylated SEBS, which provided another effective way for SEBS polymer modification.

李京(1964.11-)，女，北京人，硕士，副教授，1987年7月起在北京开放大学工作，研究方向为化学类，lij@bjou.edu.cn

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