摘要
将苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)进行氯甲基化反应,加入苄基四甲基胍(BTMG)和二正丁胺(DBA)进行反应,制备了一类含胍阳离子交联的SEBS基SEBS-BTMG-DBA碱性阴离子交换膜(简称碱性膜)。为进一步提高SEBS-BTMG-DBA的OH-传导率,将其通过三甲胺(TMA)进行二次季铵化反应,成功制备了一类高导电率、高化学稳定性的SEBS基SEBS-TMA碱性膜。结果表明:80 ℃时,SEBS-TMA碱性膜的OH-传导率为51.50 mS/cm,离子交换容量为1.41 maq/g,明显高于未二次季铵化处理的SEBS-BTMG-DBA碱性膜;SEBS-TMA碱性膜的杨氏模量为356.5 MPa,在80 ℃条件下,1 mol/L的NaOH溶液中510 h后仍保持90%以上的OH-传导率。所制SEBS-TMA碱性膜在碱性燃料电池中有较好的应用前景。
The chloromethylation of styrene-ethylene-butene-styrene(SEBS) block copolymers was carried out between benzyl tetramethyl guanidium(BTMG) and Di-n-butylamine(DBA) to prepare a series of guanidyl based cation crosslinked SEBS-based SEBS-BTMG-DBA alkaline anion exchange membranes (AEMs),which were reacted with trimethylamine(TMA) via secondary Menschutkin reaction to prepare SEBS-based SEBS-TMA AEMs in high conductivity and chemical stability. The results show that the OH- conductivity and ion exchange capacities of SEBS-TMA AEMs are 51.50 mS/cm and 1.41 maq/g respectively at 80 ℃,which are higher than those of SEBS-BTMG-DBA AEMs not treated by secondary Menschutkin reaction. The Young’s modulus of SEBS-TMA AEMs reaches 356.5 MPa. The OH- conductivity of SEBS-TMA AEMs is beyond 90% when soaked in NaOH solution of 1 mol/L at 80 ℃ for 569 h. It has been an emerging field in fuel cell.
作者
胡汇岚
朱秀玲
金翠红
张帅
Hu Huilan;Zhu Xiuling;Jin Cuihong;Zhang Shuai(Dalian University of Technology,Dalian 116024,China)
出处
《合成树脂及塑料》
CAS
北大核心
2019年第3期18-22,共5页
China Synthetic Resin and Plastics
基金
国家重点研发计划(2016YFB0101203)
国家自然科学基金(21875029)
