芳烯
膜
高分子化学
乙醚
材料科学
Nafion公司
聚合物
缩聚物
质子交换膜燃料电池
离聚物
化学工程
直接甲醇燃料电池
溶剂
离子交换
侧链
化学
共聚物
有机化学
复合材料
电化学
物理化学
离子
芳基
工程类
烷基
阳极
生物化学
电极
作者
Jinhui Pang,Kunzhi Shen,Dianfu Ren,Sinan Feng,Yang Wang,Zhenhua Jiang
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:1 (4): 1465-1474
被引量:39
摘要
The preparation and characterization of new polymeric ionomers based on a fully aromatic poly(arylene ether) backbone with locally pentasulfonated pendent groups for applications as proton exchange membranes is reported. The high molecular weight sulfonated polymers were obtained by the polycondensation of new (2,6-difluorophenyl) (4-(1,2,3,4,5-pentaphenylbenzene)phenyl)methanone, 4,4′-difluorodiphenyl methanone, and 4,4′-dihydroxydiphenylsulfone, followed by sulfonation using sulfuric acid in high yields. The polymers produced tough, flexible, and transparent membranes by solvent casting. Membranes with ion exchange capacities between 0.8 and 1.7 mEq g-1 showed high proton conductivities and low methanol permeabilities. Compared to Nafion 117, these sulfonated membranes exhibited better microphase separation morphologies. The fully humidified membranes also exhibited considerably good mechanical properties, with tensile strengths from 35 to 45 MPa and elongations at break from 23 to 49%. This investigation demonstrates a controllable high density sulfonated side group of a poly(arylene ether sulfone) membrane with tunable and balanced properties, which is promising for proton exchange membrane fuel cell technology.
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