摘要
以二苯甲酮(BP)为紫外引发剂,将聚乙二醇甲基丙烯酸甲酯(PEGMA)接枝在聚砜超滤膜表面以提高膜的抗污染性能.在二苯甲酮存在的条件下,波长较长(λ>300nm)的紫外光(UV)辐射下发生提氢反应,可以有效防止聚砜分子主链的剪切,保持改性膜的分离性能.考察了PEGMA浓度、UV辐射时间和BP浓度对改性超滤膜接枝度、亲水性和抗污染性能的影响.用表面全反射红外光谱(ATR/FTIR)表征改性前后膜表面化学组成的变化.表面改性膜的纯水通量略有降低而牛血清白蛋白(BSA)截留率有所提高.随着接枝度的提高,PEGMA接枝改性膜的抗污染性能增加.
The poly（ethylene glycol） methyl ether methacrylate（PEGMA） was grafted onto polysulfone（PSF） ultrafiltration membrane using benzophenone（BP） as the initiator to improve the antifouling property.The polymer chain scission was suppressed by H-abstraction from methyl groups under long-wavelength UV irradiation（λ﹥300 nm）,which partly avoided the photodegradation of PSF ultrafiltration membrane.The effects of PEGMA concentration,UV irradiation time and BP concentration on grafting degree,contact angle（CA） and the improvement of membrane antifouling properties were investigated.Attenuated total reflectance Fourier transform infrared spectroscopy（ATR/FTIR） was used to characterize the change of chemical composition.The flux of pure water decreased slightly after modification,while the rejection to bovine serum albumin（BSA） increased.The improvement of antifouling property for PEGMA-modified membrane was accordant with the increase of grafting degree.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第12期2506-2510,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20906086)资助
关键词
超滤膜
二苯甲酮
紫外辐射
抗污染
Ultrafiltration membrane
Benzophenone
UV-irradiation
Antifouling
