Effect of ethanol in the coagulation bath on the structure and performance of PVDF-g-PEGMA/PVDF membrane |
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| Authors: | Yulan Tang Jian Sun Shaofeng Li Zhilin Ran Yingxue Xiang |
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| Affiliation: | 1. Municipal and Environmental Engineering College, Shenyang Jianzhu University, Shenyang, 110168 People's Republic of China;2. Shenzhen Key Lab of Industrial Water Saving & Municipal Sewage Reclamation Technology, Shenzhen Polytechnic Institute, Shenzhen, 518055 People's Republic of China;3. School of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, 518172 People's Republic of China |
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| Abstract: | This report investigated the effect of ethanol content in the coagulation bath on the surface composition, membrane pore size structure, pure water flux, and permeability of the amphiphilic polymer polyvinylidene fluoride (PVDF)-g-poly (ethylene glycol) methyl ether methacrylate (PEGMA)-modified PVDF membrane. The study found that pore size and their distribution and, as a result, membrane permeability, can also be easily controlled by adjusting ethanol content in the coagulation bath. Membrane water fluxes formed by the coagulation baths with 0, 10, 20, and 30% of ethanol were 1843.65, 2774.61, 4391.88, and 5142.35 L (m−2·h−1). When the content of ethanol in the coagulation bath is high, the surface enrichment of PEGMA slightly decreases, and the surface becomes rougher. Thus, the decrease of the hydrophilic functional groups on the surface of the membrane and the increase of the roughness leads to the deterioration of the hydrophilicity of the membranes surface. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47380. |
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