Tri-quaternized poly (ether sulfone) anion exchange membranes with improved hydroxide conductivity

被引：58
作者：
Chen, Wanting [1 ]
Yan, Xiaoming [2 ]
Wu, Xuemei [1 ]
Huang, Shiqi [1 ]
Luo, Yongliang [1 ]
Gong, Xue [1 ]
He, Gaohong [1 ,2 ]
机构：
[1] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Res & Dev Ctr Membrane Sci & Technol, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Sch Petr & Chem Engn, Panjin 124221, Peoples R China
来源：
JOURNAL OF MEMBRANE SCIENCE | 2016年 / 514卷
基金：
中国国家自然科学基金;
关键词：
Anion exchange membrane; Fuel cells; Poly (ether sulfone); Micro-phase separation; Hydroxide conductivity; ALKALINE STABILITY; IMIDAZOLIUM; KETONE); ELECTROLYTE; IONOMER; DEGRADATION; TRANSPORT; CATION; GRAFT;
D O I：
10.1016/j.memsci.2016.05.004
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A novel anion exchange membrane with tri-quaternized side chain has been developed in the present work. Di-cationic quaternary ammonium salt, 1-(4'-{1"-azonia-4"-azabicyclo [2.2.2] octyl} butyl) azonia-4-azabicyclo [2.2.2] octane (AABAA), is synthesized and used as tri-quaternization reagent. The tri-quaternized side chains enhance ionic interactions, which induce good micro-phase separation and excellent swelling resistance. Better aggregation of ionic clusters is observed in transmission electron microscopy (TEM) image in the tri-quaternized poly (ether sulfone) membrane (tri-QPESOH) compared to that in the mono-quaternized membrane (mono-QPESOH). Tri-QPESOH membranes achieve a well-balanced performance between high hydroxide conductivity and dimensional stability. Especially, the tri-QPESOH membrane with IEC 2.31 mmol g(-1) exhibits high hydroxide conductivity of 45.9 mS cm(-1) at 25 degrees C and 130.9 mS cm(-1) at 80 degrees C, and low swelling ratio of 21.5% even at 80 degrees C. Tri-QPESOH membranes also show improved thermal, mechanical and chemical stabilities. These observations suggest that the tri-cationic side chains provide a promising solution to the electrochemical-mechanical balance of anion exchange membranes. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：613 / 621
页数：9
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