一种含砜基六元环聚酰亚胺的制备及气体分离性能研究  

Preparation and gas separation performance of six-membered ring polyimide containing sulfone groups

作　　者：张家卿 余李歆玥 郭晓霞[1] 房建华[1] Zhang Jiaqing;Yu Lixinyue;Guo Xiaoxia;Fang Jianhua(School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240)

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《化工新型材料》2022年第11期95-98,102,共5页New Chemical Materials

基　　金：国家"973"计划项目(2014CB643600)。

摘　　要：以1,4,5,8-萘四甲酸二酐(NTDA)、4,4′-双(3-氨基苯氧基)二苯基砜(mBAPS)与3,7-二氨基-2,8-二甲基二苯并噻唑砜(DDBT)为单体,采用传统一步法合成了一种主链含有砜基结构的聚酰亚胺NTDA-mBAPS/DDBT,并通过红外光谱对其结构进行表征。使用1-甲基-2-吡咯烷酮(NMP)作为溶剂,通过浇铸得到了聚酰亚胺膜(PI膜),并测试了膜的各项性能。机械性能测试结果表明,制得的PI膜具有良好的机械性能,拉伸强度为68M~81MPa,断裂伸长率为12.9%~28.7%;气体分离性能测试结果显示,PI膜具有较高的气体选择性能,NTDA-mBAPS/DDBT 1/1:P_(CO_(2))/P_(N2)=30.5,P_(CO_(2))/P_(CH4)=37.7;NTDA-mBAPS/DDBT 3/1:PCO_(2)/PN2=33.1,PCO_(2)/P_(CH4)=45.4。A polyimide(PI)was synthesized from 1,4,5,8-naphthalenetetracarboxylic dianhydride(NTDA),4,4′-bis(3-aminophenoxy)diphenyl sulfone(mBAPS)and 3,7-diamino-2,8-dimethyldibenzothiazole sulfone(DDBT)via the traditional one-step reaction.The polyimide was characterized by FT-IR spectrum.Mechanical test results revealed that the prepared polyimide membranes had good mechanical properties with tensile strength of 68~81MPa and the elongation at break of 12.9%to 28.7%.Gas separation test displayed that the PI membranes possessed excellent separation performances for CO_(2)/N_(2) and CO_(2)/C_H_(4),NTDA-mBAPS/DDBT 1/1:P_(CO_(2))/P_(N2)=30.5,P_(CO_(2))/P_(CH4)=37.7;NTDA-mBAPS/DDBT 3/1:P_(CO_(2)_/P_(N2)=33.1,P_(CO_(2))/P_(CH4)=45.4.

关 键 词：六元环聚酰亚胺 膜 气体分离 

分 类 号：O63[理学—高分子化学]