摘要
膜材料的选择以及膜内微相结构的形成直接影响离子交换膜的性能,且膜主体的微相结构与膜的制备以及改性方法有着莫大的关联。为了在离子交换膜内部构建规的离子传输通道,本文通过固定摩尔比例为1∶1的2-甲基-2丙烯酸甲酯(MMA)和甲基丙烯酸二甲基氨基乙酯(DMAEMA)进行自由基聚合反应,合成叔胺-酯基型共聚物。借助共聚物中的叔胺基团与多孔溴化聚苯醚基膜中溴甲基之间的门舒特金(Menshutkin)反应,制备了一系列阴离子交换膜。研究发现,当D_1M_1的添加量为1.00 mL时,所制得离子交换膜的氢氧根型电导率最高,达57.90 mS·cm^(-1),其水含量为6.0%,离子交换容量为1.51 mmol·g^(-1),线性溶胀率为7.5%。此研究表明:通过简单的Menshutkin反应,并使用含有叔胺基团的聚合物作为介质,可以合成具有优异氢氧根电导率的阴离子交换膜,为阴离子交换膜燃料电池所需的电解质膜提供了一种可行的选择。
The selection of membrane materials and the formation of microphase structures within the membrane directly influence the performance of ion exchange membranes.Meanwhile,the microphase structure of the membrane matrix is closely related to the membrane preparation and modification methods.To construct ordered ion transport channels within ion exchange membranes,this study synthesized a tertiary amine⁃ester copolymer through free radical polymerization using methyl methacrylate(MMA)and 2⁃(dimethylamino)ethyl methacrylate(DMAEMA)at a fixed molar ratio of 1∶1.A series of anion exchange membranes were prepared via Menshutkin reaction between the tertiary amine groups in the copolymer and bromomethyl groups in porous brominated polyphenylene ether⁃based membrane.The results showed that when 100 mL of D1M1 was added,the resulting ion exchange membrane exhibited the highest hydroxide ion conductivity of 5790 mS·cm^(-1),with water content of 60%,ion exchange capacity of 151 mmol·g^(-1),and linear swelling ratio of 75%.This study demonstrates that anion exchange membranes with excellent hydroxide conductivity can be synthesized through a simple Menshutkin reaction using tertiary amine⁃containing polymers as intermediates,providing a viable option for electrolyte membranes in anion exchange membrane fuel cells.
作者
胡伟
吴贤龙
徐文娟
赵常保
肖新乐
HU Wei;WU Xianlong;XU Wenjuan;ZHAO Changbao;XIAO Xinle(Feidu Aerospace Technology Co.,Ltd.,Chizhou,Anhui 247000,China;School of Materials and Environmental Engineering,Chizhou University,Chizhou,Anhui 247000,China)
出处
《信息记录材料》
2025年第8期1-3,7,共4页
Information Recording Materials
基金
国家级大学生创新创业训练计划项目(S202211306085,S202211306053,202411306055)。
关键词
聚苯醚
阴离子交换膜
离子交换膜
燃料电池
Polyphenylene oxide
Anion exchange membrane
Ion exchange membrane
Fuel cell
