含叔丁基聚酰亚胺均质膜的气体分离性能  

Gas Separation Performance of Polyimide Homogeneous Membranes Containing tert-Butyl Groups

作　　者：王寿柏 吴修明 束辰 钟敏 黄卫[3] 颜德岳[3] WANG Shoubai;WU Xiuming;SHU Chen;ZHONG Min;HUANG Wei;YAN Deyue(Xinglin College,Nantong University,Nantong 226019,China;School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China;School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]南通大学杏林学院,南通226019 [2]南通大学化学化工学院,南通226019 [3]上海交通大学化学化工学院,上海200240

出　　处：《高等学校化学学报》2022年第11期232-240,共9页Chemical Journal of Chinese Universities

基　　金：装备研发与共享技术项目(批准号:41421060301)资助。

摘　　要：采用高温“一步法”缩聚合成了一系列含叔丁基的可溶性芳香聚酰亚胺树脂,然后通过溶液浇注法制得相应均质薄膜,并对其气体分离性能进行了测试,同时研究了二酐结构和温度对聚酰亚胺均质膜气体分离性能的影响.结果表明,对于H_(2),N_(2),O_(2),CO_(2)和CH_(4)等5种气体,含叔丁基聚酰亚胺均质膜不仅表现出良好的透气性,而且具有较高的气体透过选择性,4,4’-(六氟异丙烯)二酞酸酐(6FDA)和均苯四甲酸二酐(PMDA)两类聚酰亚胺均质膜的气体分离性能最佳.除CO_(2)外,这两类聚酰亚胺均质膜的气体渗透系数随温度升高而升高,而所有测试气体在这两种均质膜中的扩散系数和溶解度系数均随温度升高而增大.A series of soluble aromatic polyimides containing tert-butyl groups were synthesized by the one-pot hightemperature polycondensation.The corresponding homogeneous membranes were prepared by the solution casting method and then their gas separation performances were measured.The effects of dianhydride chemical structures and temperature on the gas separation performance of these polyimide membranes were investigated in detail.For five kinds of gases(including H_(2),N_(2),O_(2),CO_(2) and CH_(4)),all of them exhibited good gas permeability with the high gas permselectivity,especially the polyimide membranes containing 4,4’-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)or pyromellitic dianhydride(PMDA).Except for CO_(2),the gas permeability coefficients increased with increasing the temperature for these two kinds of polyimide membranes,while the diffusion coefficients and solubility coefficients of the five gases were increased with increasing the temperature.

关 键 词：聚酰亚胺均质膜 气体分离 叔丁基 

分 类 号：O631[理学—高分子化学]