两性离子在超滤膜抗污染改性中的研究进展

Research progress on zwitterion for antifouling modificationof ultrafiltration membranes

超滤膜在水处理、生物医药、食品加工等诸多领域具有广泛的应用,但由于膜材料本身的疏水性,使超滤膜在使用过程中易受到污染,而两性离子聚合物作为一种新型的亲水材料,在超滤膜抗污染改性方面受到了广泛关注。两性离子聚合物中同时含有阴、阳离子基团,具有很强的水化能力,可有效抵抗蛋白质等污染物的吸附。对几类常用的两性离子材料进行了介绍,综述了近年来两性离子改性超滤膜的研究进展,并对两性离子改性超滤膜未来的发展进行了展望。

Ultrafiltration membranes are widely used in water treatment,biomedicine and food industry.However,ultrafiltration membranes are susceptible to fouling due to the hydrophobicity of membrane materials.Recently,as a kind of novel hydrophilic material,zwitterionic polymer has attracted extensive attention in antifouling modification of ultrafiltration membranes.The zwitterionic polymers contain both anionic and cationic groups and have strong hydratability,which can effectively resist the adsorption of protein and other pollutants.In this review,several types of commonly used zwitterionic materials are introduced,the recent research progresses of ultrafiltration membranes modification by zwitterionic materials are reviewed,and the future development of zwitterion modified ultrafiltration membrane is prospected.