膜科学与技术

基于丙烯酸钠-乙烯基胺的交联均相阴离子交换膜的研究

作者：付佳雯，郝妙莉，康焯，何欣平，鹿倩倩，伊春海

单位： 1 西安交通大学化学工程与技术学院，西安 710049； 2 中国石油天然气管道工程有限公司，河北廊坊 065000

关键词：阴离子交换膜；丙烯酸-乙烯基胺；燃料电池；阻醇

出版年,卷(期):页码： 2023,43(3):8-14

摘要：

以碱中和后的丙烯酸（AA）和N-乙烯基甲酰胺（NVF）为原料，合成了一系列交联型碱性聚电解质膜。利用碱性聚电解质中羧酸根解离能够产生OH-离子的特性，采用溶液流延法制备相应的均相阴离子交换膜。通过FTIR、热重和含水溶胀度等手段对离子交换膜进行表征，研究了原料组成和交联程度对膜的离子电导率和甲醇渗透系数的影响。结果表明，室温下，当单体AA/NVF的质量比为1:1，交联剂戊二醛（GA）质量分数为0.1 %时，离子交换膜的导电率可达到3.2 mS/cm，甲醇透过系数为9.6×10-8 cm2/s，显示出其具有应用于直接甲醇燃料电池（DMFCs）的潜力。

Carboxylate based polyelectrolyte is an important membrane material. In this work, a series of cross-linked alkaline polyelectrolyte membranes were synthesized from alkali neutralized acrylic acid (AA) and N-vinylformamide (NVF). Based on the characteristic that carboxylate radical dissociation in alkaline polyelectrolyte can produce OH-, the corresponding homogeneous anion exchange membrane was prepared by solution tape casting method. The ion exchange membrane was characterized by FTIR, thermogravimetry, water content and water swelling degree testing. The effects of composition and cross-linking degree on ionic conductivity as well as methanol permeability were studied. At room temperature, when the monomer mass ratio AA/NVF is 1:1 and the crosslinking agent glutaraldehyde (GA) content is 0.1 wt%, the conductivity of the ion exchange membrane can reach 3.2 mS/cm, and the methanol transmission coefficient is 9.6×10-8 cm2/s. It shows that it has the potential for application in direct methanol fuel cell (DMFCs).

付佳雯（1995-），女，重庆人，学生，博士，本科，从事渗透汽化脱盐材料的制备与应用，E-mail：fjw1021@foxmail.com

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