SEBS远程接枝季铵阳离子阴离子交换膜的研究  

Study on remote grafting of quaternary ammonium cation SEBS-based anion exchange membranes

作　　者：李京[1] 李聪会 王芳辉 LI Jing;LI Conghui;WANG Fanghui(College of Science and Technology,Beijing Open University,Beijing 100081,China;College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[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

出　　处：《膜科学与技术》2023年第2期95-103,共9页Membrane Science and Technology

基　　金：科技部重点研发计划(2019YFA0210300);国家自然科学基金(21975017,51961145107)。

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94.2%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,对聚合物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^(-)传导率,经过4 mol/L 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 94.2%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℃,and after soaking in 4 mol/L 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.

关 键 词：SEBS 傅克酰基化 远程接枝 OH-传导率 耐碱性 

分 类 号：O632.1[理学—高分子化学] TK91[理学—化学]