气态法进行聚砜中空纤维超滤膜表面紫外光引发接枝聚合改性的实验研究

利用聚砜中空纤维膜内表面作为接枝层，进行动态表面光接枝聚合反应的研究——在气态条件下进行引发并在液态条件下进行接枝反应．实验结果表明：用二苯甲酮作为引发剂，丙烯酰胺作为亲水性接枝单体，聚丙烯酰胺链可以被接枝到膜表面．通过对反应前后的接触角、水通量和截留率的测量，发现分离膜的亲水性和孔径都发生了变化，而且接枝聚合的程度随着参数和实验条件的变化而变化，如引发时间、单体浓度、聚合温度和聚合时间等．此方法对于制造较小孔径的中空纤维超滤膜提供了新思路，是非常值得发展和研究的方向．

Experimental study on gas- initiation & photo- graft polymerization under UV radiation on the surface of polysulfone hollow fiber ultrafiltration membrane

Using the inner-surface of polysulfone hollow fiber ultrafiltration membranes as grafted layer,the dynamic surface photo-graft method has been studied.In this paper the dynamic reaction method used is gas-initiation & liquid-polymerization.The results indicated that using benzophenone(BP) as photo-initiator,acrylamide as graft monomer,the polyacrylamide chain was grafted on the surface of membranes.After the surface of membrane was modified,the water flux and retention altered,and thus it can be seen that the hydrophilicity and the diameter of the pores in the membrane were altered.Furthermore,the degree of polymerization varied with the changes of the parameters and conditions,such as irradiation time,monomer concentration,temperature and time of polymerization and so on.These experiments contribute to finding a new way to produce the hollow fiber membrane with the small pore size and are extraordinarily worth developing and studying.