热交联的离子簇型阴离子交换膜的制备与性能  

Preparation and properties of thermally crosslinked ion cluster anion exchange membranes

作　　者：姜璎珊 周维阳 徐国洋 李立忠 李香丹[1] JIANG Yingshan;ZHOU Weiyang;XU Guoyang;LI Lizhong;LI Xiangdan(College of Chemistry and Materials Science,South-Central Minzu University,Wuhan 430074,China;College of Resources and Environmental Science,South-Central Minzu University,Wuhan 430074,China)

机构地区：[1]中南民族大学化学与材料科学学院,武汉430074 [2]中南民族大学资源与环境学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2023年第1期18-25,共8页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(51243005)。

摘　　要：通过聚芳醚砜的改性和功能化,制备了一系列不同交联程度的离子簇型阴离子交换膜(cQPSF-bisQAxTAPy),通过^(1)H NMR和FT-IR确定了聚合物的结构.结果表明:cQPSF-bisQAx-TAPy具有较好的成膜性和明显的微相分离结构,其凝胶分数在50.8%~68.5%范围,离子交换容量(IEC)值可达到2.07~2.35 mmol‧g^(-1).在80℃下,吸水率(WU)、溶胀率(SR)和离子传导率(σ)分别为83.0%~192.6%、20.3%~58.8%和112.7~173.7 mS‧cm^(-1).cQPSF-bisQAxTAPy的初始分解温度约为180℃,拉伸强度为9.79~20.11 MPa,断裂伸长率为11.1%~20.3%,在60℃的1 mol‧L^(-1) NaOH溶液中浸泡7 d后,σ可以保持初始的90.3%~93.2%.cQPSF-bisQAx-TAPy具有较高的离子传导率的同时,还表现出良好的尺寸稳定性、碱性稳定性、机械性能和热性能.A series of ionic cluster anion exchange membranes(cQPSF-bisQAx-TAPy)with different degrees of crosslinking were prepared by modification and functionalization of poly(arylene ether sulfone),and the structures of the copolymers were characterized by ^(1)H NMR and FT-IR.The results indicated that the cQPSF-bisQAx-TAPy had good filmforming properties and well-defined nanophase separation,with gel fractions in the range of 50.8%−68.5%and the ion exchange capacity(IEC)reaching 2.07−2.35 mmol‧g^(-1).Water uptake(WU),swelling ratio(SR)and ion conductivity(σ)were in the range of 83.0%−192.6%,20.3%−58.8% and 112.7−173.7 mS‧cm^(-1) at 80℃,respectively.The initial decomposition temperature of cQPSF-bisQAx-TAPy was around 180°C.The tensile strength was 9.79−20.11 MPa,while the elongation at break were 11.1%−20.3%,and theσcould be maintained at 90.3%−93.2%of the initial value after 7 days of immersion in 1 mol‧L^(-1) NaOH at 60℃.Besides high ionic conductivity,cQPSF-bisQAx-TAPy also exhibited excellent dimensional stability,alkaline stability,mechanical properties and thermal properties.

关 键 词：阴离子交换膜 季铵化 离子簇型 热交联 

分 类 号：O631[理学—高分子化学]