Fabrication of anisotropic PEBA magnetic membranes via inducement of magnetic field and study on its performance for O2/N2 separation
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
Abstract: Polyether block polyamide (PEBA) magnetic membranes with an anisotropic structure are constructed through the solvent evaporation process under an external magnetic field, by which Fe3O4 magnetic particles in the membranes concentrates near the membrane surface.The relationship between the structure and O2/N2 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/Fe3O4) is 53% higher than that of isotropic magnetic membrane (i-PEBA/Fe3O4), showing a higher magnetic responsiveness.As Fe3O4 content is 10wt%, the anisotropic magnetic membrane exhibits a superior O2/N2 separation performance, with an O2 permeability coefficient of 36.84 Barrer and an ideal O2/N2 selectivity of 4.55.
康雪婷, 万超, 金腾, 白云翔, 董亮亮, 张春芳. 磁场诱导构建非均质PEBA磁性膜及其氧氮分离性能的研究[J]. 现代化工, 2021, 41(12): 99-102,106.
KANG Xue-ting, WAN Chao, JIN Teng, BAI Yun-xiang, DONG Liang-liang, ZHANG Chun-fang. Fabrication of anisotropic PEBA magnetic membranes via inducement of magnetic field and study on its performance for O2/N2 separation. Modern Chemical Industry, 2021, 41(12): 99-102,106.
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