聚砜-Fe_3O_4磁性复合超滤膜的制备及应用

Preparation of Polysulfone-Fe_3O_4 Magnetic Composite Ultrafiltration Membrane and Application

采用相转化法把纳米Fe3O4颗粒填充到聚砜中制备磁性复合超滤膜。由扫描电镜、原子力显微镜观察可知,纳米粒子在膜中分布基本均匀,在30μm×30μm观测范围内复合膜的粗糙度只有46.059nm。在不同磁场强度下,分别考察了聚砜-Fe3O4磁性复合超滤膜对葛根素、芦丁单体的超滤实验。两种单体的透过率随磁场强度变化趋势不同,葛根素在0.2T磁场下透过率达到最大,芦丁在0.4T下透过率达到最大。这种差异表明有望利用这种磁性复合超滤膜,通过调节外加磁场实现对一系列不同物质的连续分离。

Polysulfone（PSF）-Fe304 composite ultrafiltration membrane was made by phase-inversion process. SEM, AFM showed that most particles distributing uniformly in the membrane and the mean surface roughness （RMS） was only 46.059 nm in the range of the scan areas 30μm× 30μ m. The puerarin and troxerutin ultraftltration with the PSF-Fe304 composite membrane in different magnetic intensities were performed respectively. The change current of permeation with the intensity were different. In the puerarin ultrafiltration test, the permeation got to maximum in 0.2 T while in the troxerutin test, the permeation got to maximum in 0.4 T. The difference proves the novel idea that different objects can be separated with only a composite membrane in turn by controlling the magnetic field doable.