含聚醚链段的共聚聚酰亚胺膜材料的气体渗透性能  

Gas permeation properties of copolyimide membranes containing polyether segment

作　　者：邱晓智[1] 曹义鸣[1] 周美青[1] 王丽娜[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《天津工业大学学报》2008年第3期40-42,共3页Journal of Tiangong University

基　　金：国家(863)计划项目(2006AA05Z315)

摘　　要：4,4-′六氟亚异丙基-邻苯二甲酸酐(6FDA)和1,3-苯二胺(mPDA)与二端氨基聚丙二醇缩聚,得到含有聚醚柔性链段的聚酰亚胺气体分离膜.考察了N2、H2、CH4和CO2在其均质膜中的气体渗透性能.结果表明,随着聚合物中D2 000含量的增加,N2、CH4和CO2的渗透系数逐渐增加,而H2的渗透系数先减小后增加;同时聚醚链段与CO2相对较强的相互作用使CO2比H2优先透过膜,而CO2/N2分离系数保持不变.Polyimide copolymers containing polyether soft segment were synthesized from 2,2-his （3,4-dicarboxyphenyl） hexafluoroprophane dianhydride （6FDA） with m-phenylenediamine （mPDA） and O,O′-bis （2-aminopropyl） polypropylene glycol （D2000）. N2, H2, CH4 and CO2 permeation properties for the eopolyimides dense membranes were investigated. The results show that as the content of D2000 in the polyimide is increased, the permeability coefficients of N2, CH4 and CO2 are increased, while the permeability coefficients of H2 is firstly decreased and then increased. Meanwhile, due to the interaction of polyether segment and CO2 is stronger than light gas, the permeability coefficient of CO2 is higher than H2, and the ideal selectivity of CO2/N2 is unchanged.

关 键 词：气体分离膜 聚酰亚胺 聚醚 渗透性能 

分 类 号：TS102.54[轻工技术与工程—纺织工程] TQ028.8[轻工技术与工程—纺织科学与工程]