Fe_3O_4/PIM-1磁性混合基质膜的制备及其O_2/N_2分离性能研究

Preparation and O_2/N_2 separation performance of Fe_3O_4/PIM-1 magnetic mixed matrix membrane

以自具微孔聚合物PIM-1为聚合物基质,采用溶剂挥发法制备了Fe_3O_4/PIM-1磁性混合基质膜,研究了不同Fe_3O_4添加量以及在分离过程中有无外加磁场对膜的O_2/N_2分离性能影响.结果表明,随着Fe_3O_4添加量的增加,膜的O_2渗透系数和O_2/N_2选择性均先增加后减少.磁化后混合基质膜O_2/N_2分离性能进一步提高,这可以归因于磁场和磁化粒子对O_2和N_2分子的耦合作用.当Fe_3O_4添加量为2%时,在压力为0.1 MPa、温度为25℃,磁场强度为56mT下,O_2渗透系数达到681Barrer,O_2/N_2选择性为3.32.

The Fe3O4 / PIM - 1 magnetic mixed matrix membrane （ MMM ） was successfully prepared by solvent evaporation using properties of Fe3O4/PIM polymers of intrinsic microporosity PIM-1 as matrix. The O2/N2 separation 1 magnetic MMMs were investigated asa function of Fe3O4 contents and magnetic field. The results showed that O2/N2 permeability coefficient and selectivity of magnetic MMMs increased following a decline with the increasing Fe3O4 contents. After magnetization, O2/N2 separation performance of Fe3O4/PIM-1 magnetic MMM sraised further, resulting from the coupled interactions of magnetic field and magnetic nanofillers. For Fe3O4/PIM- 1 magnetic MMM with 2 % Fe3O4 contents, the permeability coefficient of O2 and O2/N2 selectivity reached 681 Barrer and 3.32 respectively in 0. 1 MPa,25 ℃, 56 milliTesla.