| Membrane separation technology has a wide applications in water treatment, chemical industry, medical treatment and other fields. In this paper, we prepared anti-pollution membrane and ion exchange membrane by bondingδ-Gluconolactone and polyacrylic acid on the surface of PSF membrane, respectively, and investigated the adsorption properties of the resulting membrane to protein. The contents of the thesis include:(1) The chloromethylation of PSF was performed beforehand, and obtained flat membrane by phase inversion process, and then we prepared anti-pollution ultrafiltration membrane by grafting 8-Gluconolactone on the membrane surface. The hydrophilicity, flux to pure water, interception rate to protein and anti-pollution properties of membrane were investigated. The results showed that the hydrophilicity of the modified membrane increased significantly and the adsorption amount to proteins decreased about 66.8% compared to the unmodified membrane, exhibiting strong anti-pollution performance.The preparation method for the membrane is simple, and the anti-pollution ultrafiltration membrane has a certain value.(2) Poly tert-butyl methacrylate(PtBMA) was grafted on the surface of chloromethylated polysulfone membrane by atom transfer radical polymerization(SI-ATRP), and hydrolysed in alkaline conditions to obtion an ion exchange membrane. Chemical structure, morphology and hydrophilicity of the prepared ion-exchange membrane were characterized by means of ATR-FTIR, XPS,1H-NMR, SEM and OCA.The adsorbed amount of the membrane to protein were determined for three modified membrane with different polymerization times.The results show that protein adsorption on grafted polymethacrylate (PMAA) membrane increased with the increase of grafting time, indicating that ion exchange capacity of PMAA membrane can be controlled by regulating the polymerization time. It was also found the protein adsorption of PSF-g-PMAA ion exchange membrane was affected by pH and salt concentration, and the relationship between them verified the grafted membrane to be of ion-exchange membrane.
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