EVA38/Tween20凝胶气体分离膜的制备及其性能  

Preparation of EVA38/Tween20 gel gas separation membranes and their performances

作　　者：张春芳[1] 赖傲楠[1] 白云翔[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：《化工进展》2013年第5期996-1000,共5页Chemical Industry and Engineering Progress

基　　金：中央高校基本科研业务费专项资金(JUSRP311A01);国家自然科学基金(21106053)项目

摘　　要：采用溶剂挥发法制备了EVA38/Tween20凝胶膜,研究了不同Tween20含量对凝胶膜物理化学结构和气体渗透性能的影响。结果表明,Tween20与EVA38具有良好的相容性。Tween20的引入降低了膜的结晶度和熔融温度,也明显改善了膜的柔顺性,因而膜的CO2和N2渗透系数显著增加。同时膜的CO2/N2选择性也增加,这可以归因于Tween20中的乙氧基团对CO2强的选择吸附作用。当Tween20添加量从0增加到100%(以EVA38质量为基准)时,凝胶膜的CO2渗透系数由EVA38膜的89.5 Barrer增加到285 Barrer,CO2/N2理想分离因子从14.92增加到19.13。EVA38 membrane and EVA38/Tween20 gel membranes were prepared by solvent evaporation method.The physical and chemical structures and gas permeation properties for the gel membranes were investigated as a function of Tween20 content.The results showed a good compatibility of EVA38 polymer with Tween20.With the addition of Tween20,the crystallinity and melting temperature of the membrane decreased obviously while the flexibility were improved remarkably,resulting in a dramatic increase in permeability coefficients for both CO2 and N2.Meanwhile,the ideal selectivity of CO2/N2increased since the ethylene oxide groups in Tween20 have a strong affinity to CO2.As Tween20 loading increased from 0 to 100%（compared with the amount of EVA38）,the CO2permeability coefficient of the gel membranes increased from 89.5 to 285 barrer,the CO2/N2ideal selectivity increased from 14.92 to 19.13.

关 键 词：吐温20 凝胶膜 渗透性能 气体分离膜 

分 类 号：TQ028.8[化学工程]