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• W3192307540 startingPage "119699" @default.
• W3192307540 abstract "Polyvinylidene fluoride (PVDF) is rarely used as substrate membrane for thin film composite polyamide (PA) nanofiltration (NF) membrane due to its hydrophobic surface pushes water away during interfacial polymerization. According to Jurin's law, the pressure of membrane surface pushed water away is inversely proportional to the radius of membrane pore. In this study, a series of commercial PVDF membranes with pores ranging from 25 to 450 nm were used as substrates in a traditional interfacial polymerization. This preparation process does not need any pre-modification on substrate or specific equipment. It was found that the PVDF substrate pore size greatly influences the morphologies and surface properties of the corresponding TFC PA NF membrane. Only when a PVDF substrate has moderate pore size, such as 50 and 100 nm, could a continuous and defect-free PA layer will be formed, as verified through SEM characterization. The TFC membrane prepared with the PVDF substrate of 100 nm exhibits a 27.0 L m -2 h -1 bar -1 pure water permeance, and a 96.2% Na 2 SO 4 rejection. The facile and effective method demonstrated in this study provides a new thought for the preparation of PVDF substrate supported PA NF membrane. • Hydrophobic PVDF membranes were used as substrates for TFC membrane preparation. • Substrate pore size influences membrane morphology and separation performance. • Continuous and defect-free polyamide layers were formed at pore size of 50 and 100 nm. • No pre-modification or harsh condition was needed in membrane preparation." @default.
• W3192307540 created "2021-08-16" @default.
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• W3192307540 date "2021-11-01" @default.
• W3192307540 modified "2023-10-01" @default.
• W3192307540 title "Facile preparation of polyvinylidene fluoride substrate supported thin film composite polyamide nanofiltration: Effect of substrate pore size" @default.
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• W3192307540 doi "https://doi.org/10.1016/j.memsci.2021.119699" @default.
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