以无磁性聚砜超滤膜为对照,采用液-液界面法,以水-正丁醇体系为对象,时不同磁场强度下,聚砜-Fe_3O_4磁性复合超滤膜的孔径变化规律进行了研究.结果表明,在不同磁场下,2张空白聚矾膜的孔径无显著变化,3张聚砜-Fe_3O_4复合膜的孔径变化显著且趋势相同,即OT～0.4 T时,平均孔径随场强增大而增大,0.4T～1.2T时,平均孔径随场强增大而减小.纯水通量实验结果显示,不同磁场对膜通量影响的变化趋势与所测孔径变化相吻合.
the change rule of the pore size of the PSF-Fe_3O_4 magnetic composite membrane was researched by using liquid-liquid interfacial method, with the object of water-n-butanol, and the blank sample of non-magnetic PSF (polysulfone) ultrafiltration membrane. Experiment results indicate that the equivalent pore sizes of 2 blank PSF membranes change indistinctively with the different magnetic field, but that of 3 PSF-Fe_3O_4 membranes is remarkable, and trends are the same, with the rise of magnetic intensity, those increases in 0 T～0.4 T, reduced in 0.4 T～1.2 T. The results of pure water flux reveal that the flux of the magnetic membranes is affected by-the magnetic field, and its change is mostly in line with the pore sizes.
参考文献
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