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- W2995045891 startingPage "114265" @default.
- W2995045891 abstract "Membrane distillation (MD) is a promising desalination process especially in small scale systems. However, the lack of commercial MD membranes severely impedes the industrialization. Although various approaches have been explored to develop high-performance membranes, the complicated processing procedures and high cost are two major obstacles to scale up the available membranes. In this study, a facile bottom-up method using water as coagulation bath was proposed to fabricate porous poly(vinylidene fluoride) (PVDF) membranes for direct contact membrane distillation (DCMD) in view of application in desalination. By covering a piece of non-woven substrate on the nascent film followed by immersion into a water bath, a skinless PVDF membrane with an isotropic structure was obtained. The SEM characterization confirmed the formation of a rough top surface and sponge-like granular membranes composed of spherulites. The water contact angles substantially increased from 71.7° for PVDF-N membrane to ca. 144° for bottom-up membranes. The DCMD flux of the bottom-up PVDF membrane was as high as 41.4 kg/(m2 h) with a polymer concentration of 15 wt%, when the feed and permeate temperatures were 70 °C and 20 °C, respectively. This facile, environmentally friendly approach provides the possibility of manufacturing large-scale high-performance MD membranes." @default.
- W2995045891 created "2019-12-26" @default.
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- W2995045891 date "2020-03-01" @default.
- W2995045891 modified "2023-10-11" @default.
- W2995045891 title "One-step fabrication of isotropic poly(vinylidene fluoride) membranes for direct contact membrane distillation (DCMD)" @default.
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- W2995045891 doi "https://doi.org/10.1016/j.desal.2019.114265" @default.
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