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Preparation and properties of side-chain-sulfonated polyetherketone proton exchange membrane
Authors: GUO Yuxing, SHEN Chunhui, GAO Shanjun, ZHANG Lin
Units: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
KeyWords: Sulfonated polyetheretherketone, proton exchange membrane, swelling degree, proton conductivity
year,volume(issue):pagination: 2020,40(4):34-40

A series of novel side-chain-type proton exchange membranes (AEMs) composed of sulfonated polyetheretherketone backbone and pendent sulfonic acid groups were prepared via sulfonation, activation , and ring-opening reactions. Using sulfonated polyether ether ketone as the main chain of the polymer, the activation of N, N′-carbonyldiimidazole (CDI) was used to react 1-ethanolamine (MEA) with a sulfonic acid group to extend the side chain length. A ring-opening reaction of 1,3-propane sultone introduced sulfonic acid functional groups, and finally a series of new side chain sulfonated polyetheretherketone proton exchange membranes were prepared by the sol-gel method. The structure and performance of the side chain sulfonated polyetheretherketone proton exchange membranes were characterized respectively. The chemical structure of theas-synthesized copolymers was confirmed by 1H-NMR spectroscopy. The results indicated that the side chain sulfonated polyetheretherketone proton exchange membranes displayed moderate water absorption and low swelling ratio with the values in the range of 8.9% ? 11.3%. These proton exchange membranes also showed good ionic conductivity, in which the SCSPEEK proton membrane with a degree of branching of 80% reached a proton conductivity of 0.096 mS / cm at 80 ° C. The highest ion exchange capacity of the proton membrane has been reached 1.666mmol/g. Moreover, these membranes had good thermal and mechanical property and chemical oxidative stability.


第一作者简介:郭宇星(1995-),男,湖北省武汉市,硕士研究生,研究方向为燃料电池关键材料,E-mail:62739497@qq.com *通讯作者,E-mail:shenchunhui@whut.edu.cn

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