高压电场强化下聚偏氟乙烯超滤膜的制备

Aug．2014348ModernChemicalIndustry20148*150040PVPK30“2kV”PVDF。、、、。。PVDF。。。PVPK309%PVDF65.4°46%26.40μg/cm2。PVDFBSATQ028．8A0253－4320201408－0080－04PreparationofPVDFUFmembranesunderanexternalelectricfieldHEJingSHIBao-li*PolymerMembraneLaboratoryCollegeofScienceNortheastForestryUniversityHarbin150040ChinaAbstractPVDFUFmembranesarepreparedbyapplyingahighvoltageexternalelectricfield2kVandanimmersionprecipitationphaseinversionprocesswithPVPK30asadditive．Theinfluenceofexternalelectricfieldonsurfacehydrophilicitythestructuresurfacefunctionalgroupsandmembranepotentialarestudied．Inadditionanti-foulingpropertyandseparationperformanceofthemembranesareinvestigatedaswell．TheresultsindicatethatthehydrophilicityoftheelectrictreatedPVDFmembraneincreasesincomparisonwiththeun-treatedmembranes．Meantimetheseparationperformanceoftheelectrictreatedmembraneissuperiortothatoftheun-treatedmembrane．Theproteinadsorptionamountontheelectrictreatedmembranesisdistinctlyreduced．EspeciallyfortheelectrictreatedPVDFmembranewhenthemassfractionofPVPK30is9%thevalueofwatercontactanglecanreach65.4°andtheproteinadsorptionamountisdecreasedby46%reaching26.40μg/cm2．KeywordsmembranepotentialPV[e-mail][e-mail]。、1。、、2－3。、、。、4－6。、。PVDFN－－2－NMPPVPK30“”。、、。11.1PVDFPVPK30N－－2－NMPBSA。1.2PVPK30NMP16%PVDF、60℃。25℃35%～55%·08·DOI:10.16606/j.cnki.issn0253-4320.2014.08.01920148。30s2kV。。24h3、。PVDF、、、1。11.31.3.1PVDF20mm×20mm。ImageJ。1.3.2PerkinElmerSpectrum400。。1.3.3FEISirion、。。。。1.3.4。0.1MPa。6.60cm2。30min1mg/mLBSA。JL/m2·hJ=V/AΔt1VLAm2Δth。BSAＲＲ=1－Cp/Cf×1002Cpmg/mLCfmg/mL。1.3.5PVDF1g/LBSA10mL25℃24hPVDF。BSA280nm。BSAqμg/cm2。q=c0－c1×V/A3c0BSAμg/mLc1BSAμg/mLVBSAmLAcm2。1.3.6PVDF7。2。2PVDF2KCl8。1×10－3、2×10－3、3×10－3、4×10－3、5×10－3、6×10－3、7×10－3mol/LKClpH=7.0。295cm310.4cm2PVDF。90mLKCl65mL/min。1KCl1×10－3mol/L1KCl2×10－3～7×10－3mol/L。1×10－3mol/L。2Ag/AgCl2Ecell。EmmVEm=Ecell－ＲT/Flnc2/c14·18·348ＲTKFc1、c2Cl－mol/Lc1＞c2。22.1PVPK301。PVPK30PVDF。9－10。。1PVDFPVPK30/%135790kV82.580.774.974.172.92kV71.570.972.169.565.42.2PVDF3。1—0kV2—2kV3PVDF32。2.39%PVPK30PVDF4。4PVDF。SEM2PVDF。PVDFSEM。PVDF。a0kVb2kVc0kVd2kV4PVDF2.4PVDFJ×Ｒ/100PVPK305。5PVPK30J×Ｒ/100。J×Ｒ/100。J×Ｒ/100。5。1—0kV2—2kV5PVPK302.5PVDFBSA1—0kV2—2kV6PVPK30BSA·28·20148。BSA。PVPK30BSA6。6PVPK30BSAPVDFBSA。。2.6PVPK307。7PVPK30。2kV。1—0kV2—2kV7PVPK30BSA8。8BAS。pH4.8BSA。pH＞4.8BSA15。BSA。PVDF。a0kVb2kV8BSA3PVPK30“”PVDF。。SEM。。。PVDFBSA40%～57%。。1．J．200818219－23．2．/J．2011311142－146．3FuLiuNAwanisHashimYutieLiuetal．Progressintheproduc-tionandmodificationofPVDFmembranesJ．JMembrSci20113751－27．4AiguoLinShuaiShaoHuazhouLietal．Preparationandcharac-terizationofanewnegativelychargedpolytetrafluoroethylenemem-branefortreatingoilfieldwastewaterJ．JMembrSci2011371286－292．5DagnewMParkerWSetoP．AnaerobicmembranebioreactorsfortreatingwasteactivatedsludgeShorttermmembranefoulingchar-acterizationandcontroltestsJ．JMembrSci2012421/422103－110．6Hyun-ChulKimXiaShangJin-HuiHuangetal．TreatinglaundrywastewaterCationicpolymersforremovalofcontaminantsandde-creasedfoulinginmicrofiltrationJ．JMembrSci2014456167－174．7SzymczykAFievetPＲeggianiJCetal．Characterisationofsur-facepropertiesofceramicmembranesbystreamingandmembranepotentialsJ．JMembrSci1998146277－284．8JohanSchaepCarloVandecasteele．Evaluatingthechargeofnano-filtrationmembranesJ．JMembrSci2001188129－136．9BourneHEastmondGCGibasMetal．GraftedandsegmentedhydrophilicpolyimidesformicrofiltrationmembranesⅡ．FoulingmeasurementsJ．JMembrSci200220717－27．10Yong-HongZhaoKin-HoWeeＲenbiBai．Highlyhydrophilicandlow-protein-foulingpolypropylenemembranepreparedbysurfacemodificationwithsulfobetaine-basedzwitterionicpolymerthroughacombinedsurfacepolymerizationmethodJ．JMembrSci2010362326－333．11ArunimaSaxenaVinodKShahi．pHcontrolledselectivetransportofproteinsthroughchargedultrafiltermembranesundercoupleddrivingforcesAnefficientprocessforproteinseparationJ．JMembrSci2007299211－221．■·38·