膜科学与技术

磺化联苯侧基双二氮杂萘酮聚芳醚酮膜的制备

作者：张杰，刘乾，张守海，蹇锡高

单位：大连理工大学化工学院，辽宁省高性能树脂材料专业创新中心，辽宁省高分子科学与工程重点实验室，大连市膜材料与膜过程重点实验室，大连 116024

关键词：双二氮杂萘酮；联苯侧基；质子交换膜；磺化聚芳醚酮

出版年,卷(期):页码： 2023,43(6):1-7

摘要：

以1’,4-二(1,1’-联苯基)-6,6’-双二氮杂萘-1,4’-二酮、4-(4-羟苯基)-2,3-二氮杂萘-1-酮和4,4’-二氟二苯酮进行共聚合，经磺化改性制备了新型磺化联苯侧基双二氮杂萘酮聚醚酮（SPDPEKs）。通过核磁共振波谱、红外光谱对SPDPEKs的结构进行表征。采用溶液浇铸法制备了SPDPEKs质子交换膜，对其离子交换容量（IEC）、溶胀率、质子传导率以及耐氧化性进行了测试。结果表明：SPDPEK质子交换膜的IEC介于0.75~1.77 mmol/g之间，在80 ℃下的吸水率介于11.2%~30.2 %之间，溶胀率低于10 %；SPDPEKs膜在95 ℃的质子传导率介于53.3~146.2 mS/cm，在80 ℃芬顿试剂中的破裂时间在3.4~5.3 h之间，溶解时间则介于12~36 h。SPDPEKs膜表现出良好的尺寸稳定性、质子传导性和耐氧化稳定性。

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.

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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