磁场诱导构建非均质PEBA磁性膜及其氧氮分离性能的研究  

Fabrication of anisotropic PEBA magnetic membranes via inducement of magnetic field and study on its performance for O_(2)/N_(2) separation

作　　者：康雪婷 万超 金腾 白云翔 董亮亮 张春芳 KANG Xue-ting;WAN Chao;JIN Teng;BAI Yun-xiang;DONG Liang-liang;ZHANG Chun-fang(Key Laboratory of Synthetic and Biological Colloids of the Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学化学与材料工程学院,合成与生物胶体教育部重点实验室,江苏无锡214122

出　　处：《现代化工》2021年第12期99-102,106,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(21576114)。

摘　　要：采用溶剂挥发法并在成膜过程中引入外加磁场,借助磁场诱导作用促使Fe_(3)O_(4)磁性粒子向膜表面迁移,构建具有非均质结构的聚醚嵌段聚酰胺(PEBA)磁性膜,并对膜结构和氧氮分离性能进行研究。结果表明,磁场诱导迁移使磁性粒子在膜表面富集形成非均质结构;与均质磁性膜(i-PEBA/Fe_(3)O_(4))相比,非均质磁性膜(ani-PEBA/Fe_(3)O_(4))的饱和磁化强度提高了53%,表现出更高的磁响应性;当Fe_(3)O_(4)质量分数为10%时,非均质磁性膜的O_(2)渗透系数为36.84 Barrer, O_(2)/N_(2)理想选择性为4.55,具有良好的氧氮分离性能。Polyether block polyamide(PEBA) magnetic membranes with an anisotropic structure are constructed through the solvent evaporation process under an external magnetic field, by which Fe_(3)O_(4)magnetic particles in the membranes concentrates near the membrane surface.The relationship between the structure and O_(2)/N_(2)separation performance of membrane is studied.It is indicated that magnetic field induced migration makes magnetic particles accumulate on the membrane surface to form heterogeneous structure;the saturation magnetization of anisotropic magnetic membrane(ani-PEBA/Fe_(3)O_(4)) is 53% higher than that of isotropic magnetic membrane(i-PEBA/Fe_(3)O_(4)),showing a higher magnetic responsiveness.As Fe_(3)O_(4)content is 10 wt%,the anisotropic magnetic membrane exhibits a superior O_(2)/N_(2)separation performance, with an O_(2)permeability coefficient of 36.84 Barrer and an ideal O_(2)/N_(2)selectivity of 4.55.

关 键 词：磁性膜 非均质结构 磁场诱导 O_(2)/N_(2)分离 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ620.9[化学工程—精细化工]