新型聚芳醚砜阴离子交换膜的制备及性能研究

发布时间：2018-04-13 12:40

  本文选题：碱性燃料电池 + 聚醚砜　； 参考：《中国矿业大学》2015年硕士论文

【摘要】：使用阴离子交换膜的聚合物电解质燃料电池具有较高的能量转化效率、可采用非贵金属催化剂、低污染与低维护费用等优点,有望成为能源利用中一种突出的清洁能源技术。新型的阴离子交换膜的开发工作受到了越来越多的关注。本文是对聚芳醚砜类阴离子交换膜的功能化及膜制备展开的一系列研究,论文的主要内容如下。(1)以邻甲基对苯二酚和4,4’-二氟二苯砜制备了含甲基侧基聚醚砜嵌段,然后利用该嵌段进行嵌段聚合、NBS溴代、季铵盐转化制备了侧链季铵化的聚醚砜(NPBMHQF-x)膜材料,核磁表征了产物的结构。性能研究表明,对比类似的无规共聚物的膜材料,嵌段聚合物膜材料具有较低的吸水率和溶胀率,尺寸稳定性较好、电导率较高。离子交换量为1.42mmol/g时,NPBMHQF-50在80℃时的电导率达到了43.6 ms/cm。膜材料在室温下4mol/LKOH溶液中浸泡7天,电导率没有发生变化。(2)用4,4’-二氟二苯砜对邻甲基对苯二酚进行酚羟基的保护,然后经NBS溴代,季铵盐转化,合成了带有季铵盐侧基的功能单体DFQNHQ。用DFQNHQ单体、4,4’-二氟二苯砜和双酚AF缩聚制备了带有季铵盐侧基的聚醚砜阴离子交换膜(DFQNHQP-x),通过核磁表征了各阶段产物的结构。通过使用功能单体聚合,季铵基团的数量和在聚合物主链的位置可以得到有效地控制。性能研究表明,膜材料有一定的力学性能和十分优异的碱稳定性、尺寸稳定性,离子交换量最高的DFQNHQP-100(IEC=1.15mmol/g)在80℃的电导率是35.8 ms/cm。虽然电导率并不是十分突出,但为之后的阴离子交换膜的研发提供了一种由功能单体直接聚合的思路。
[Abstract]:The polymer electrolyte fuel cell with anion exchange membrane has the advantages of high energy conversion efficiency, non-noble metal catalyst, low pollution and low maintenance cost. It is expected to be an outstanding clean energy technology in energy utilization.More and more attention has been paid to the development of new anion exchange membranes.In this paper, a series of studies on the functionalization and preparation of poly (aryl ether sulfone) anion exchange membranes were carried out.Then the block was used to polymerize NBS and the quaternary ammonium salt was converted to prepare the side chain quaternary ammonium polyethersulfone (PES) NPBMHQF-x membrane material. The structure of the product was characterized by NMR.The results show that compared with the membrane materials of similar random copolymers, the block polymer membranes have lower water absorption and swelling rate, better dimensional stability and higher conductivity.The conductivity of NPBMHQF-50 reached 43.6 Ms / cm at 80 鈩，

本文编号：1744531