O2/N2 permeability properties of magnetic CNT filled PIM membranes under action of magnetic field
XU Xiao-dong, WANG Ao-sheng, BAI Yun-xiang, 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: Magnetic Fe3O4-CNTs are synthesized via in-situ growth method and are then filled into polymers of intrinsic microporosity (PIM).PIM-1/Fe3O4-CNT mixed matrix membranes (MMMs) are prepared by solvent evaporation method.The influences of the mass fraction of Fe3O4-CNT and the intensity of magnetic field on the O2/N2 permeability properties and physicochemical character of MMMs are investigated under action of outer magnetic field.The results show that the interaction between Fe3O4-CNT and PIM-1 matrix is enhanced,the dispersive situation of magnetic Fe3O4-CNT within membranes is improved significantly and the mechanical properties of MMMs are increased.The synergistic effect between the induced magnetic field of Fe3O4 nanoparticles and the hollow structure of CNT-COOH can increase greatly the O2/N2 permeability of MMMs.When the mass fraction of Fe3O4-CNT is 1.5% in MMMs,the O2 permeability coefficient and O2/N2 selectivity of PIM-1/Fe3O4-CNT MMMs can reach 602 Barrer and 4.32,respectively,which are 76% and 27% higher separately than pure PIM-1 membrane.Both O2 permeability and O2/N2 selectivity of MMMs increase with the enhancing outer magnetic field.
徐晓东, 王傲生, 白云翔, 张春芳. 磁场作用下磁性碳纳米管填充自具微孔聚合物膜的氧氮渗透性能[J]. 现代化工, 2018, 38(8): 68-72.
XU Xiao-dong, WANG Ao-sheng, BAI Yun-xiang, ZHANG Chun-fang. O2/N2 permeability properties of magnetic CNT filled PIM membranes under action of magnetic field. Modern Chemical Industry, 2018, 38(8): 68-72.
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