链段疏水性对聚咔唑基三联苯基哌啶阴离子交换膜的影响  

Effect of chain hydrophobicity on poly(carbazolyl terphenyl piperidinium)anion exchange membranes

作　　者：蔡志鸿 张秋根[1] 朱爱梅[1] 刘庆林[1] CAI Zhihong;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79-88,共10页Membrane Science and Technology

基　　金：国家自然基金面上项目(22078272&22278340)。

摘　　要：通过引入不同疏水性的柔性链段(含氟链段、烷基链段和含羟基链段)可以提升阴离子交换膜(AEM)的性能。本研究采用超酸催化反应制备了3种AEM,分别为含氟戊烷与1-己基-1-甲基哌啶鎓的聚咔唑基三联苯基哌啶(PCTPPF)、含正己烷与1-己基-1-甲基哌啶鎓的聚咔唑基三联苯基哌啶(PCTPPC)和含戊醇与1-己基-1-甲基哌啶鎓的聚咔唑基三联苯基哌啶(PCTPPO).通过测试接触角、溶胀率、电化学电阻和单电池性能来表征AEM的亲疏水性、离子电导率、碱性稳定性和单电池功率密度等性能.结果表明,强疏水性的PCTPPF具有低溶胀(14.9%,80℃)的特性,而且其离子电导率(160.4 mS/cm,80℃)和单电池功率密度(646 mW/cm^(2),80℃)均具有优势.而亲水链段的PCTPPO能够在较为恶劣的碱性环境中维持高离子电导保留率(86.3%,2 mol/L NaOH).相较于PCTPPF和PCTPPO,PCTPPC的各项性能较为均衡.The performance of anion exchange membranes(AEMs)is improved by introducing flexible chains(fluorine-containing,alkyl-containing and hydroxyl-containing chains)with different hydrophobicities.This article focuses on three AEMs prepared through superacid-catalyzed condensation reaction,namely poly(carbazolyl terphenyl piperidinium)containing fluoropentane and 1-hexyl-1-methylpiperidium(PCTPPF),poly(carbazolyl terphenyl piperidinium)containing hexane and 1-hexyl-1-methylpiperidium(PCTPPC),and poly(carbazolyl terphenyl piperidinium)containing pentanol and 1-hexyl-1-methylpiperidium(PCTPPO).This article focuses on characterizing the hydrophilicity and hydrophobicity,ionic conductivity,alkaline stability and single cell power density of AEM by testing contact angle,swelling ratio,electrochemical resistance and single cell performance.Among them,PCTPPF with a strong hydrophobicity have a low swelling ratio(14.9%,80℃),an excellent ionic conductivity(160.4 mS/cm,80℃)and single cell performance(646 mW/cm2,80℃).However,the hydrophilic PCTPPO can maintain a high ionic conductivity retention(86.3%,2 mol/L NaOH)in a harsh alkaline environment.Compared with PCTPPF and PCTPPO,the performance of PCTPPC is balanced.

关 键 词：燃料电池 阴离子交换膜 柔性链段 

分 类 号：TQ028[化学工程] O632.7[理学—高分子化学]