期刊
MATERIALS CHEMISTRY FRONTIERS
卷 5, 期 18, 页码 6904-6912出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qm00826a
关键词
-
资金
- Six Talent Peaks Project of Jiangsu Province [XCL-078]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20-2528]
- Priority Academic Program Development of Jiangsu Higher Education Institutions of China
Poly(aryl ether sulfone) anion exchange membranes with eight flexible piperidinium ions were prepared using specific synthesis methods, demonstrating high water absorption, excellent ion conductivity, and alkaline stability. The study highlights the importance of selecting specific ionic groups and distributing cations to enhance the performance of AEMs.
A class of poly(aryl ether sulfone) anion exchange membranes (PAES-8mPip-x) containing eight flexible piperidinium ions in the repeating unit were prepared using 4,4 '-difluorodiphenylsulfone, 2,2 '-bis(4-hydroxyphenyl)-hexafluoropropane and 3,3 ',5,5 '-tetrakis(3 '',5 ''-dimethoxyphenyl)-4,4 '-difluorodiphenyl sulfone via aromatic nucleophilic polycondensation, demethylation reaction and Williamson reaction. The membranes possessed good flexibility, clear phase separation structures and continuous ion conduction channels. PAES-8mPip-x (1.26-1.90 mmol g(-1)) exhibited high water absorption, low size swelling and excellent OH- conductivity due to the incorporation of highly distributed flexible side piperidinium ions, and their values were in the range of 44.8-104.4%, 14.4-25.3% and 49.5-114.2 mS cm(-1) at 60 degrees C, respectively. The membranes also had excellent alkaline stability. Their retention value of OH- conductivity reached 88.2% after immersing in a 2 mol L-1 NaOH aqueous solution at 80 degrees C for 480 h. This study demonstrates that the ionic conductivity and alkaline stability of AEMs can be effectively improved via selecting specific ionic groups and distribution of cations in the structural unit.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据