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Study on Sulfonated Poly(phthalazinone ether nitrile ketone) Containing Pendant
Phenyl Group as Membrane Materials

Authors： TAN Xiangkun, ZHANG Shouhai, LIU Qian, WANG Zhaoqi, JIAN Xigao

Units： College of Chemical Engineering, Dalian University of Technology, Liaoning High Performance Polymer Engineering Research Center, Liaoning Key Laboratory of Polymer Science and Engineering, Dalian Key Laboratory of Membrane Materials and Process, Dalian 116024, China

KeyWords： Phthalazinone; Poly(aryl ether nitrile ketone); Pendant phenyl group; Sulfonation; Proton exchange membrane

ClassificationCode：TQ326.6

year,volume(issue):pagination： 2021,41(5):17-25

Abstract：

Poly(phthalazinone ether nitrile ketone) containing pendant phenyl group (PPENK-P) were synthesized via high temperature polycondensation from 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one(DHPZ), 4-(3-phenyl-4-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ-P), 2,6-dichlorobenzonitrile, and 4,4´-difluorobenzophenone. A series of sulfonated poly(phthalazinone ether nitrile ketone) containing pendant phenyl group (SPPENK-P) were prepared from the sulfonation of PPENK-P with concentrated sulfuric acid as sulfonating agent. SPPENK-P membranes were prepared through solution casting method. The membrane performance including water uptake, swelling ratio, mechanical property, oxidative stability, and proton conductivity were investigated. The results show that SPPENK-P can be dissolve in solvents such as dimethylacetamide and dimethyl sulfoxide at 25 ℃, and the 5% thermal weight loss temperature is above 330 ℃. As the proportion of DHPZ-P moiety in SPPENK-P increase, the IEC value, water uptake, swelling ratio, and proton conductivity of the membranes increase, while the oxidation resistance decrease. The water uptake of SPPENK-P membranes at 25 ℃ is above 8 %, and the proton conductivity at 95 ℃ can reach 9.59×10-2 S/cm.

Funds：

国家重点研发计划项目(2017YFB0307600)，国家自然科学基金委创新研究群体项目（22021005），辽宁省‘兴辽英才计划’项目(XLYC1802073)，大连市高层次人才创新支持计划（2019RD08）

AuthorIntro：

谭相坤（1995-），男，黑龙江省大庆市人，硕士生，主要从事磺化聚芳醚膜材料研究，E-mail：18246951021@163.com

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