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Preparation of sulfonated poly(biphthalazinone ether ketone) containing pendant diphenyl groups

Authors： ZHANG Jie, LIU Qian, ZHANG Shouhai, JIAN Xigao

Units： School of Chemical Engineering, Dalian University of Technology, Liaoning Province Technology Innovation Center of High Performance Resin Materials, Liaoning Key Laboratory of Polymer Science and Engineering, Dalian Key Laboratory of Membrane Materials and Membrane Processes, Dalian 116024, China

KeyWords： biphthalazinone; pendant diphenyl group; sulfonated poly(aryl ether ketone)s; proton exchange membrane

ClassificationCode：TQ326.6

year,volume(issue):pagination： 2023,43(6):1-7

Abstract：

Novel sulfonated poly(biphthalazinone ether ketone) containing pendant diphenyl groups (SPDPEKs) were prepared by copolymerization of 1',4-di(1,1'-biphenyl)-6,6'-biphthalazin-1,4'(2H,3'H)-dione, 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one and 4,4'-difluorobenzophenone, and then sulfonation. The structures of SPDPEKs were characterized by 1H-NMR and FT-IR. SPDPEKs proton exchange membranes were prepared by solution casting method. Ion exchange capacity (IEC), water uptake, swelling ratio, proton conductivity and oxidation resistance of SPDPEKs mrembranes were invetigated. The results showed that IEC of SPDPEKs membranes ranged from 0.75—1.77 mmol/g, water uptake of the membrane at 80 °C was 11.2%—30.2%, and swelling ratio was less than 10%. Proton conductivity of SPDPEKs membranes at 95 °C was 53.3—146.2 mS/cm. The rupture time in the Fenton test at 80 °C was in the range of 3.4—5.3 h, and the dissolution time was in the range of 12—36 h. SPDPEK membranes exhibit good dimensional stability, proton conductivity, oxidation stability, and mechanical property.

Funds：

国家自然科学基金委创新研究群体项目(22021005)；国家自然科学基金项目(22178043)；中央高校基本科研业务费专项资金 (DUT22LAB605)

AuthorIntro：

张杰（1997-），男，浙江温州人，硕士，从事磺化聚芳醚酮质子交换膜材料研究

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