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StudyonthePreparationofHollowFiberUltra-filtrationMembraneofPSF-SPESBlend
CHENGu-ie1,2, WEIYong-ming2, XUZhen-liang2, FANGDing-ye2
(1.DepartmentofChemicalEngineering,ShanghaiInstituteofTechnology,Shanghai200235,China;2.CollegeofChemicalEngineering,EastChinaUniversityofScienceandTechnology,Shanghai200237,China)
Abstract: Usingpolysulfone(PSF),sulfonatedpolyethersulfone(SPES)andcellouseacetate(CA)asmembranemate-rials,waterasinternalcoagulantagent,thehollowfiberasymmetricmembrane(PSF-SPES)weremadebydry/wetphaseseparation.Theeffectsofdifferentionexchangecapacity(IEC),SPESconcentration,differentaddictiveagents,externalcoagulantagents(PEG200,butanolandpropanol)andheatingtreatmentonmembraneperformancewerediscussed.Thecross-sectionalandsurfacestructureofhollowfibermembraneswereexaminedbyelectronscanningmicroscope.There-sultofexperimentshowsthattheretentionofw=0.001Na2SO4aqueoussolutionwas19.9%withfluxbeing62L/(h m2 MPa),andtheretentionofw=0.001PEG4000aqueoussolutionwas78.2%withfluxbeing85L/(h m2 MPa).Besides,usingPSF-SPEShollowfibermembraneassupportmembraneandCAaqueoussolutionascoatingsolution,CA/PSF-SPEScompositemembraneswerepreparedandtheperformanceofthecompositemembraneswasstudied.Thestruc-tureofCA/PSF-SPESultra-filtrationmembranewasalsodiscussed.
Keywords: hollowfibermembrane;ultra-filtrationmembrane;sulfonatedpolyethersulfone;polysulfone;cellouseace-tate