采用相转化法,把纳米Fe3O4颗粒填充到聚砜(PSF)中制备PSF-Fe3 O4磁性复合超滤膜.由扫描电镜观察可知两种膜的膜孔结构和孔径基本相似,纳米粒子主要在孔内壁上,部分发生了团聚.选取在溶液中带电的α-淀粉酶和不带电的葡聚糖两类物质为研究对象,考察在有无磁场的情况下,PSF-Fe3 O4膜对它们的截留率变化.结果表明,在0.4T的外加磁场下,当pH为2.5、3.5和7.5时,截留率分别从97％降到79％、84％和84％；对于不带电的物质葡聚糖；在0.4T的外加磁场下,PSF-Fe3O4膜的截留率也降低,从56％降到17％.通过这些现象来对PSF-Fe3 O4膜在磁场下的作用机理进行分析.
参考文献
| [1] | Chiang B H;Su C K;Tsai G J et al.Egg white lysozyme purification by ultrafiltration and affinity chromatography[J].Journal of Food Science,1993,58:303-310. |
| [2] | Tansel B;Regula J;Shalewitz R .Treatment of fuel oil and crude oil contaminate waters by ultrafiltration membranes[J].Desalination,1995,102:301-311. |
| [3] | Ghosh R.;Cui ZF. .Protein purification by ultrafiltration with pre-treated membrane[J].Journal of Membrane Science,2000(1):47-53. |
| [4] | A.Bottino;G.Capannelli;V.D'Asti;P.Piaggio .Preparation and properties of novel organic-inorganic porous membranes[J].Separation and Purification Technology,2001(0):269-275. |
| [5] | Yan Lu;Li Yushui .Effect of nano-sized Al2O3-particle addition on PVDF ultrafiltration membranes performance[J].Journal of Membrane Science,2006,276:162-167. |
| [6] | Bae TH;Tak TM .Effect of TiO2 nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration[J].Journal of Membrane Science,2005(1/2):1-8. |
| [7] | Han P;Yahui H;Yang W;Linlin L .Preparation of polysulfone-Fe3O4 composite ultrafiltration membrane and its behavior in magnetic field[J].Journal of Membrane Science,2006(1/2):9-16. |
| [8] | Hong CY.;Horng HE.;Hsu CJ.;Yao YD.;Yang HC.;Jang IJ. .ORDERED STRUCTURES IN FE3O4 KEROSENE-BASED FERROFLUIDS[J].Journal of Applied Physics,1997(8 Pt.2a):4275-4277. |
| [9] | 沈辉,徐雪青,王伟.磁性液体表面形貌与颗粒排列结构的电子显微镜观察[J].中国科学E辑,2003(01):25-28. |
| [10] | 白木,周洁.纳米磁性材料及其应用[J].信息记录材料,2002(02):38-39. |
| [11] | 奥汉德利RC.现代磁性材料原理和应用[M].北京:化学工业出版社,2002 |
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