不同构型的支化型聚芳烃阴离子交换膜的制备  

Branched polyaromatic AEMs with different conformations

作　　者：王家军 张秋根[1] 朱爱梅[1] 刘庆林[1] WANG Jiajun;ZHANG Qiugen;ZHU Aimei;LIU Qinglin(The College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学化学化工学院,厦门361000

出　　处：《膜科学与技术》2023年第6期20-28,共9页Membrane Science and Technology

基　　金：国家自然基金面上项目(22078272,22278340)。

摘　　要：通过超酸催化制备了一系列不同构型的支化型聚芳烃阴离子交换膜(AEMs),考察支化单体结构对AEMs性能的影响.结果表明,在相似的离子交换容量(IEC)下,支化结构的AEMs比直链型AEM的离子电导率和耐碱性更优异,柔性支化聚联苯三苯基甲烷螺环阳离子(PBTMPASU)膜的离子电导率优于刚性支化的聚联苯三苯基苯螺环阳离子(PBTBPASU)和聚联苯三蝶烯螺环阳离子(PBTPASU)膜.在80℃下,柔性支化PBTMPASU膜的OH-电导率达128.2 mS/cm,在2 mol/L NaOH溶液中进行1 080 h的耐碱性测试后,OH-电导率保留了94.1%.此外,基于PBTMPASU膜制备的单电池在1 167.0 mA/cm^(2)的电流密度下峰值功率密度高达559.9 mW/cm^(2).A series of branched polyaromatic AEMs with different conformations were prepared by superacid catalysis to investigate the effect of different branched monomer structures on AEMs performance.At similar IECs,the branched structured AEMs exhibited superior ion conductivity and alkali resistance compared to the straight-chain AEMs,the ion conductivity of the flexible branched PBTMPASU membrane had better than that of rigidly branched PBTBPASU and PBTPASU membranes.The OH−conductivity of the flexible branched PBTMPASU membrane reached 128.2 mS/cm at 80℃,and after 1080 h of alkali resistance testing in a 2 mol/L NaOH solution,the OH−conductivity retained 94.1%.In addition,the single cell prepared based on PBTMPASU membranes achieved a peak power density of 559.9 mW/cm^(2)at a current density of 1167.0 mA/cm^(2).

关 键 词：燃料电池 阴离子交换膜 支化结构 

分 类 号：TQ028[化学工程] O632.7[理学—高分子化学]