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Fe₃O₄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/Fe₃O₄）相比，非均质磁性膜（ani-PEBA/Fe₃O₄）的饱和磁化强度提高了53%，表现出更高的磁响应性；当Fe₃O₄质量分数为10%时，非均质磁性膜的O₂渗透系数为36.84 Barrer，O₂/N₂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 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(1994-),女,硕士研究生,主要从事膜材料制备及应用研究,1527488126@qq.com