PEBA/EPH热可逆凝胶膜的制备及其气体分离性能  

Preparation of high permeability PEBA/EPH thermo-reversible gel membranes and their gas separation performance

作　　者：张影[1] 白云翔[1] 张春芳[1] 顾瑾[1] 孙余凭[1] 

机构地区：[1]江南大学化学与材料工程学院食品胶体与生物技术教育部重点实验室,江苏无锡214122

出　　处：《应用化工》2014年第5期795-799,804,共6页Applied Chemical Industry

基　　金：国家自然科学青年基金项目(21106053);江苏省产学研前瞻性联合研究项目(BY2013015-28)

摘　　要：通过热致相分离法制备了具有高气体渗透性能的聚醚共聚酰胺/乙二醇苯醚凝胶膜(PEBA/EPH),并探讨了EPH含量对其物理化学结构及CO2/N2渗透性能的影响。结果表明,PEBA/EPH凝胶膜具有良好的力学性能及优异的气体渗透性能,EPH的添加使得膜结晶度及熔融温度下降,从而CO2、N2在凝胶膜内的渗透系数显著增加。同时,由于EPH对于CO2具有优先吸附性,凝胶膜的CO2/N2选择性也相应增加。当EPH含量从0%增加到60%时,凝胶膜的CO2渗透系数由234 barrer增加到1 040 barrer,CO2/N2的气体选择系数从22.5增加到40.5。PEBA/ EPH Thermo-reversible gel membranes were prepared by thermally induced phase sepa-ration（ TIPS）method. The physical and chemical structure and CO2 / N2 gas permeation properties for these membranes were characterized as a function of EPH content. The results showed that PEBA/ EPH gel membranes have excellent mechanical property and high permeability. With the addition of EPH,the crystallinity and melting temperature of the membranes decrease obviously,which result in a significant in-crease in permeability coefficients for both CO2 and N2 . Moreover,the ideal selectivity of CO2 / N2 increa-ses since the preferential adsorption of EPH. When the EPH content increased from 0 to 60% ,CO2 perme-ability improved from 234 to 1 040 barrer and the selectivity of CO2 / N2 reached from 22. 5 to 40. 5.

关 键 词：乙二醇苯醚 凝胶膜 聚醚共聚酰胺 气体分离 ethylene GLYCOL phenyl ether(EPH) 

分 类 号：TQ028.8[化学工程]