Surface modification method for polyether sulfone filter membrane

The invention discloses a surface modification method for a polyether sulfone filter membrane. The polyether sulfone filter membrane is treated by plasma, graft polymerization of glycidyl methacrylateon the membrane surface is triggered, then an epoxide ring opening reaction is triggered between the treated membrane and amino acid under a weakly basic condition, and the polyether sulfone filter membrane with the surface modified with amino acid zwitterions is obtained. The method has the advantages that the process is simple, the conditions are mild, and hydrophilicity and protein adhesion resistance of the polyether sulfone filter membrane are improved remarkably. 本发明公开了种聚醚砜滤膜表面改性方法，将聚醚砜滤膜用等离子体处理，引发甲基丙烯酸缩水甘油酯在膜表面接枝聚合，然后在弱碱性条件下与氨基酸引发环氧开环反应，得到氨基酸两性离子表面改性的聚醚砜滤膜。该方法工艺简单，条件温和，显著提高聚醚砜滤膜的亲水性和抗蛋白粘附性能。