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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

ClassificationCode：TM911.48

year,volume(issue):pagination： 2020,40(4):34-40

Abstract：

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.

Funds：

国家自然科学基金（基金号21875176），国家自然科学基金（基金号21276202）

AuthorIntro：

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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