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Study on UV grafting hydrophilic modification of PVDF membranes by response surface methodology
Author(s): 
Pages: 46-49
Year: Issue:  2
Journal: China Synthetic Resin and Plastics

Keyword:  poly(vinylidene fluoride)response surface methodologyultraviolet graftinghydrophilic modification;
Abstract: Poly(vinylidene fluoride) (PVDF) membranes were prepared by non-solvent induced phase separation, and then hydrophilic monomers like acrylic acid (AA) and 2-hydroxyethylmethacrylate (HEMA) were grafted onto the surface of PVDF membranes via UV grafting with benzophenone as photo-initiator. The experiment of UV grafting was designed by response surface methodology, and the effects of the monomer con-centration and irradiation time on the hydrophilic modification of PVDF membranes were studied, respectively. The optimization of process solution for the two graft monomers was achieved. The optimal solution for the AA grafted PVDF (PVDF-g-AA) membranes was the AA mass concentration of 1.98%, the irradiation time of 40 minutes, and the water absorption ratio of the membrane so obtained was 109.95%; while for the HEMA grafted PVDF (PVDF-g-HEMA) membranes, the HEMA mass concentration was 1.5%, the irradiation time was 36.64 minutes, and the water absorption ratio of the membrane obtained was 96.95%.
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