关键词: 紫外光, 马来酸酐, 膜, 表面, 超滤, 抗污染性

Abstract: Maleic anhydride (MAH) was bonded onto the surface of membrane by ultraviolet (UV)-initiated graft to improve the anti-fouling property of polyacrylonitrile (PAN) ultrafiltration membrane. The effect of UV radiation power，irradiation time, initiator and monomer concentrations on the reaction yield were investigated. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR/FT-IR)，scanning electron microscopy (SEM) and water contact angle measurement were employed to characterize the structure and the properties of the membranes. The results revealed that MAH monomer had been bonded onto membrane surface successfully and the hydrophilicity of modified membrane was increased. The static protein pollution of membranes and ultrafiltration results were used to evaluate the anti-fouling property of the membranes. The results demonstrated that the water flux did not change obviously after MAH bonding. However, the anti-fouling property of the modified membranes was enhanced obviously. Furthermore，PAN membrane surface was functionalized by anhydride groups in MAH monomer which endowed the membranes with high reactivity.

Key words: UV, Maleic anhydride, membrane, surface, ultrafiltration, anti-fouling property