Preparation of PVDF porous membranes by using PVDF-g-PVP powder as an additive and their antifouling property |
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| Authors: | Chenqi Xu Wei Huang Xin Lu Deyue Yan Shutao Chen Hua Huang |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China;2. The Dow Chemical (China) Company, No. 936, Zhangheng Road, Shanghai 201203, PR China;3. CNOOC Research Institute, State Key Laboratory of Offshore Oil Exploitation, Beijing, China;1. State Key Laboratory of Separation Membranes and Membrane Processes, School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China;2. School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China;1. Department of Chemical and Materials Engineering and Green Technology Research Center, Chang Gung University, Guishan District, Taoyuan 333, Taiwan;2. Institute of Environmental Science, Engineering and Management, Industrial University of Ho Chi Minh City, Go Vap District, Ho Chi Minh City 727010, Vietnam;3. Department of Radiation Oncology, Chang Gung Memorial Hospital, Guishan District, Taoyuan 333, Taiwan;4. Department of Safety, Health and Environmental Engineering, Ming-Chi University of Technology, Taishan District, New Taipei City 243, Taiwan;5. R & D Center for Membrane Technology, Chung Yuan Christian University, Chung Li District, Taoyuan 320, Taiwan;1. Institute of Biomedical and Pharmaceutical Technology & College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350001, China;2. Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China |
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| Abstract: | The hydrophilic PVDF-g-PVP powder was used as additive to prepare a series of PVDF/PVDF-g-PVP blend porous membranes via an immersion precipitation phase inversion process. FTIR-ATR measurements confirmed that the hydrophilic PVP preferentially segregated to the interface between membrane and coagulant. SEM images showed that there was no big change in the membrane cross-section with the amount of PVDF-g-PVP increased. However, the membrane surface roughness increased with the amount of PVDF-g-PVP increased according to AFM data. The mean pore size of membranes reached max when the amount of PVDF-g-PVP was 10 wt%. The water contact angle and filtration experiments revealed that the surface enrichment of PVP endowed the membranes with significantly enhanced surface hydrophilicity and protein-adsorption resistance. The flux recovery of the porous membranes was increased from 37.50% to 77.23% with the amount of PVDF-g-PVP increased from 0 to 50 wt%, also indicating that the antifouling property of the porous membranes was improved. |
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