污水处理膜技术-抗污染聚砜超滤膜研究

膜技术是目前国际水处理研究的核心,以聚砜为膜材料,聚乙二醇(PEG400)为添加剂,采用浸入沉淀相转化法制备聚砜平板超滤膜,以二苯甲酮(BP)为引发剂,N,N-二甲基N-(2-甲基丙烯酸酰氧乙基)N-(3-磺丙基)铵(DMMSA)为改性单体,对实验制备的聚砜超滤膜进行紫外辐照改性,通过选择长波长的紫外光进行辐射,在一定程度上克服了辐射过程中聚砜的光降解现象。表面全反射红外吸收(ATR/FTIR)、扫描电镜(SEM)和静态水接触角(CA)分别用来测试亲水改性过程对分离膜表面化学组成、表面形态和亲水性的变化。BSA超滤实验结果表明,经过表面紫外接枝聚合以后,改性聚砜超滤膜的抗污染能力明显提高。

Membrane technology is the core of current international water treatment research.Polysulfone is used as the membrane material and polyethylene glycol(PEG400)as the additive,polysulfone flat ultrafiltration membrane is prepared by immersion precipitation phase inversion method.Benzophenone(BP)is as an initiator,and N,N-dimethyl N-(2-methacryloyloxyethyl)N-(3-sulfopropyl)ammonium(DMMSA)is as a modified monomer,the filter membrane is modified by ultraviolet irradiation,and by selecting long-wavelength ultraviolet light for irradiation,the photodegradation of polysulfone during the irradiation process is be overcomed to a certain extent.Surface total reflection infrared absorption(ATR/FTIR),scanning electron microscopy(SEM),and static water contact angle(CA)were used to test the changes in the chemical composition,surface morphology,and hydrophilicity of the separation membrane surface during the hydrophilic modification process.The results of BSA ultrafiltration experiments show that the anti-fouling ability of the modified polysulfone ultrafiltration membrane is significantly improved after surface UV graft polymerization.