交联型聚芳醚基阴离子交换膜的制备及性能研究  

Preparation and performance of crosslinked poly(arylene ether)s-based anion exchange membranes

作　　者：王秀琴 林陈晓[1] 朱爱梅[1] 张秋根[1] 刘庆林[1] WANG Xiuqin , LIN Chenxiao , ZHUAimei , ZHANG Qiugen , LIUQinglin(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361005

出　　处：《膜科学与技术》2018年第2期1-8,共8页Membrane Science and Technology

基　　金：国家自然科学基金(21576226)

摘　　要：燃料电池由于能量转化率高、环境友好等优点,是最具应用前景的能量转化装置之一。阴离子交换膜作为燃料电池的核心部件,仍存在低电导、高溶胀等问题.这里,通过设计聚芳醚结构使其侧链末端含有碳碳双键,在Grubbs二代催化剂作用下进行烯烃复分解反应接枝离子基团,利用剩余不饱和双键在高温下的交联反应,制备出交联型聚芳醚基阴离子交换膜.由于亲水性侧链与疏水性主链的不兼容性,使膜内形成了有利于离子传输的微相分离结构,交联膜的最高电导率达到81.1mS/cm(80℃).此外,交联结构能有效地抑制膜的溶胀,交联膜C-FPAE-PH-1.5在30℃下的溶胀率仅为7.51%,表现出优异尺寸稳定性.C-FPAE-PH-1.5膜在60℃下1mol/L KOH水溶液中浸泡360h后,保留了93.1%的电导率,表现出优异的耐碱性能.Fuel cells are regarded as one of the most perspective energy conversion devices due to its high efficiency and low pollution.As a critical component of fuel cells,anion exchange membranes （AEMs）still meet the dilemma of low conductivity and high swelling ratio.Herein,crosslinked poly（arylene ether）s-based anion exchange membranes （AEMs） were prepared via olefin metathesis using Grubbs Ⅱ catalyst and crosslinking under thermal treatment.The as-prepared AEMs exhibit obvious microphase separated morphology since the hydrophilic side chain is immiscible with hydrophobic poly （arylene ether）s backbone.Finally,the crosslinked AEMs demonstrate a highest conductivity of 81.1 mS/cm at 80 ℃.The crosslinked structure is effective at enhancing the dimensional stability of the membranes.C-FPAE-PH-1.5 shows a low swelling ratio of 7.51％ at 30 ℃.Furthermore,the crosslinked AEMs show robust alkaline stability.C-FPAE-PH-1.5 remained 93.1％ of its original conductivity after immersing into a 1 mol/L KOH aqueous solution at 60 ℃ for 360 h.

关 键 词：烯烃复分解 交联型 阴离子交换膜 燃料电池 

分 类 号：O632.7[理学—高分子化学]