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Preparation and characterization of high flux ultrafiltration composite membrane based on nanofibrous substrate and cellulose acetate coating  
Preparation and characterization of high flux ultrafiltration composite membrane based on nanofibrous substrate and cellulose acetate coating
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关键词: cellulose  acetate  nanofibrous  substrate  ultrafiltration  high  flux  
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Highfluxultrafiltration(UF)membranesbasedonelectrospunpolyacrylonitrile(PAN)nanofibroussubstratesandcelluloseacetate(CA)hydrophiliccoatingshavebeendemonstrated.Scanningelectronmicroscopy(SEM)wasusedtoexaminethesurfaceandcrosssectionalmorphologiesofthesecompositemembranes.Theresultsshowedthatthesurfaceofthemembraneswasflatandsmooth,andtheCAcoatingwaspenetratedintotheelectrospunnanofibroussubstrate.ConcentrationeffectofCAinthecoatingsolutiononfiltrationpropertiesofthecompositemembraneswasinvestigated.Theexperimentalresultsshowedthatthecompositemembraneof10wt%CAcoatingsolutionpossessedhighwaterflux(310L·m-2·h-1)withgoodorganicrejectionrate(95.5%)foroil/wateremulsionseparation,andthecompositemembranesperformedhigherrejectionrateandlowerfluxwiththeCAconcentrationincreasing.
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