燃料电池用半互穿网络阴离子交换膜的制备及表征

Preparation and Characterization of Semi⁃Interpenetrating Network Anion Exchange Membranes for Fuel Cells

卢静 王璐璐 高慧 王吉林

Jing LU Lulu WANG Hui GAO Jilin WANG

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001 抚顺伊科思新材料有限公司，辽宁 抚顺 113000

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Fushun Yikesi New Material Co. ，Ltd. ，Fushun Liaoning 113000，China

通过构建基于咪唑官能化溴代聚苯醚（ImF?BPPO）与季铵化聚乙烯醇（QPVA）的半互穿聚合物网络（sIPN）化合物，制备了一系列新型阴离子交换膜（AEMs）；系统地研究了QPVA质量分数对复合膜综合性能的影响；利用1H?NMR、FT?IR和SEM对膜结构和复合膜形貌进行了分析，并测试了复合膜的离子交换量、含水率、电导率等性能指标。结果表明，所制备的系列复合膜相容性较好，无明显相分离现象产生；当QPVA质量分数为40%时，复合膜的含水率和溶胀率分别为58.2%和24.6%，80 ℃时的电导率为67.24 mS/cm，用浓度为6 mol/L的KOH溶液浸泡168 h后，仍能保留初始电导率的90%左右，表明该膜具有良好的电导率和耐碱稳定性。

A series of novel anion exchange membranes (AEMs) were prepared by constructing semi?interpenetrating polymer networks (sIPN) based on imidazole functional brominated polyphenyl ether (ImF?BPPO) and quaternary ammonium polyvinyl alcohol (QPVA). The effects of different contents of QPVA on the comprehensive properties of the composite membranes were systematically studied, the structure of the series composite membranes was analyzed by 1H?NMR and FT?IR, and the morphology of composite membrane was investigated by SEM, and the ion exchange capacity, water uptake and conductivity and other properties of the composite membranes were tested. The results show that the prepared series of composite membranes have good compatibility and no obvious phase separation phenomenon. When the mass fraction of QPVA was 40%, the water uptake and swelling rate of the composite membrane were 58.2% and 24.6%, respectively. At 80 ℃, the conductivity of the composite membrane reached 67.24 mS/cm. After soaking in 6 mol/L KOH alkaline solution for 168 h, about 90% of the initial conductivity was still retained, indicating that the membrane had good conductivity and alkali resistance stability.

辽宁省应用基础研究计划项目(2023JH2/101300217)

10.12422/j.issn.1672-6952.2024.06.007