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    Microfiltration membranes prepared from poly(N-vinyl-2-pyrrolidone) grafted poly(vinylidene fluoride) synthesized by simultaneous irradiation

    Year: 2013

    Journal: Journal of Membrane Science, 427, pp 303-310, 20130926

    Authors: Qiang Qin, Zhengchi Hou, Xiaofeng Lu, Xiaokai Bian, Lifang Chen, Liguo Shen, Shuai Wang

    Organizations: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

    Poly(N-vinyl-2-pyrrolidone) grafted poly(vinylidene fluoride) (PVDF-g-PVP) copolymers were synthesized by a simultaneous irradiation induced graft polymerization technique in a homogeneous system. The kinetics of the radiation induced graft polymerization was studied. Evidence for the existence of the graft chains in grafted PVDF was characterized by FT-IR spectroscopy in ATR mode. Then, membranes were cast from pristine PVDF and PVDF-g-PVP of different degree of grafting (DG) under phase inversion method. The contact angle, water uptake, water filtration and antifouling property of membranes were measured. The morphology was also studied with the use of AFM and SEM. The results showed that with the increasing DG, the contact angle became smaller, the water uptake, RMS roughness, water flux and pore size and amount of the membrane surface increased. The water flux recovery showed that membranes cast from PVDF-g-PVP also possessed an effective antifouling performance.