醚氧-烷基间隔三离子侧链型PBI碱性膜研究  

Study on PBI-based anion exchange membrane with ether-alkyl spaced tri-cationic side chains

作　　者：杨睿祯 陈婉婷 王小舟 崔福军 贺高红[1,2] 吴雪梅 YANG Rui-zhen;CHEN Wan-ting;WANG Xiao-zhou;CUI Fu-jun;HE Gao-hong;WU Xue-mei(Membrane Science and Technology Research and Development Center,State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China;Panjin Industrial Technology Institute,Dalian University of Technology,Panjin 124221,China)

机构地区：[1]大连理工大学精细化工国家重点实验室,膜科学与技术研究开发中心,辽宁大连116024 [2]大连理工大学盘锦产业技术研究院,辽宁盘锦124221

出　　处：《现代化工》2024年第3期97-102,109,共7页Modern Chemical Industry

基　　金：国家自然科学基金(22008021);辽宁省博士科研启动基金计划项目(2021-BS-064);中央高校基本科研业务费(DUT22RC(3)085)。

摘　　要：基于侧链接枝改性合成了一系列具有醚氧-烷基-醚氧链段间隔分布的三阳离子侧链型聚苯并咪唑膜(oat-PBI-x)。侧链中两段柔性的含醚链段有助于亲水通道和氢键网络的形成,促进OH-快速传递,而己烷基间隔段可打破侧链全亲水属性,有效抑制膜过度溶胀。在IEC为1.40 mmol/g时膜的综合性能达到最佳。80℃时电导率为144.4 mS/cm,拉伸强度保持在21 MPa,在80℃、1 mol/L KOH溶液中浸泡900 h后电导率保留率为91.7%。将其应用于H_(2)/O_(2)燃料电池,可在1549 mA/cm^(2)的高电流密度下达到611 mW/cm^(2)的峰值功率密度。A series of polybenzimidazole-based anion exchange membranes with ether-alkyl spaced tri-cationic side chains(oat-PBI-x)are synthesized.The two flexible ether-containing segments in the side chain greatly contribute to the formation of hydrophilic ionic channels and hydrogen bond networks,promoting OH-ions to transfer rapidly,while the hexyl spacer segments can weak the hydrophilic property of the side chain and effectively inhibit the membranes from swelling excessively.The membrane achieves the optimal comprehensive performance when IEC is 1.40 mmol·g-1.That is,oat-PBI-1.40 membrane possesses a high hydroxide conductivity of 144.4 mS·cm^(-1) at 80℃,and a tensile strength of 21 MPa.After the membrane has been soaked in 80℃,1 mol·L^(-1)KOH solution for about 900 h,the conductivity remains around 91.7%.As oat-PBI-1.40 membrane is applied in H_(2)/O_(2)fuel cell,a peak power density of 611 mW·cm^(-2)can be achieved at 80℃under a current density as high as 1,549 mA·cm^(-2).

关 键 词：阴离子交换膜 聚苯并咪唑 多阳离子侧链 醚氧键 燃料电池 

分 类 号：TQ028[化学工程] TM912.1[电气工程—电力电子与电力传动]