PVDFTiO2复合平板超滤膜的制备与性能研究

PVDF/TiO211121.3001602.300160TiO2、TiO2PVDFPVDF/TiO2.、、、TiO2PVDFFT-IRSEM.TiO2PVDF85.0°46.0°50min95%FT-IRSEMPVDFTiO2.TiO2-TS102.528.1TQ028.8A1671－024X201005－0001－05PreparationandperformanceresearchesonPVDF/TiO2compositeultrafiltrationflatmembraneWANGSi-wei1WENChen1ZHUYu-jie1XIAOChang-fa21.SchoolofEnvironmentalandChemicalEngineeringTianjinPolytechnicUniversityTianjin300160China2.KeyLaboratoryofHollowFiberMembraneMaterialsandMembraneProcessesofMinistryofEducationTianjinPolytechnicUniversityTianjin300160ChinaAbstractAPVDF/TiO2compositemembranewaspreparedbycoatingthemembranesurfacewithTiO2solandnovelTiO2solution.Bysomeexperimentssuchasfluxretentionratecontactangleandanti-foulingpropertiestheeffectsofvaryingsizeandconcentrationofTiO2solandTiO2solutioncoatingonthePVDF/TiO2compositemembranewerestudiedandthestructureandmicromorphologywerecharacterizedbyFT-IRandSEMre－spectively.TheresultsindicatethattheseparationperformanceofthePVDF/TiO2compositemembranehavebeenimprovedsignificantly.Amongthemthemembranecoatingwiththeself-madeTiO2solshowsitsout－standingperformanceswhosecontactanglereducesfrom85.0°to46.0°aftercleaningwithdeionizedwaterfor50minutesthefluxrecoveryratehasreachedover95%anditissteady-going.ItcanbeconcludedfromFT-IRthatthenumberofhydroxylonthesurfaceofmodifiedmembranehasbeenincreasedsignificantly.ItcanbefoundfromtheresultofSEMthatalargenumberofTiO2particlesareembeddedonthesurfaceandporousofthemodifiedmembranesotheanti-foulingpropertyofthemembranehasbeenenhanced.KeywordspolyvinylidenefluoridePVDFmembraneTiO2solcompositeultrafiltrationflatmembraneorganic-inorganiccompositemembranesurfacemodificationanti-fouling2010-07-079732006CB7086021985—.1959—[e-mail]295201010JOURNALOFTIANJINPOLYTECHNICUNIVERSITYVol.29No.5October2010PVDF、、、[1].PVDF[2]29.[3]PVDF.PVDF[4-9].TiO2.TiO2、、[10].TiO2TiO2[11].TiO2PVDFTiO2.-10nmTiO2[12]TiO2.PVDF/TiO2TiO2PVDF/TiO2.11.1PVDFN、N-DMAcPVPK30BASFBSA67kuTiO25.8±2nmTiO2ST-01ST-217nm20nm.JYSP-180FT-IRTENSOR37BRUCKSEMQUANTA200FEI.1.2PVDF/TiO2DMAc∶PVDF∶PVP=1∶0.18∶0.07、PVDF48h-0.2mm30s25℃48hPVDF.TiO248h.TiO2ST-01ST-21PVDF/TiO2-1、PVDF/TiO2-2PVDF/TiO2-3.1.3PVDF/TiO20.1MPa1m/s30min0.1MPa500mg/LBSAPVDF.48h550℃4h.22.1TiO22.1.1TiO21TiO2.1TiO2TiO21.PVDFTiO2TiO2[13]TiO22——5.2.1.2TiO22TiO2.2TiO2BSAPVDF/TiO2-190%PVDF/TiO2-2PVDF/TiO2-380%PVDF63.8%..PVDF/TiO2-1、PVDF/TiO2-2PVDF/TiO2-3TiO2210mg/L、100mg/L430mg/L.PVDF/TiO2-1210mg/L、PVDF/TiO2-2100mg/LPVDF/TiO2-3430mg/L.2.2TiO22.2.1TiO21.1PVDFPVDF/TiO2-1210mg/L46.0°50%TiO2.PVDFPVDF/TiO2-1210mg/L33PVDF.2.2.2TiO2PVDFBSA4.4PVDF/TiO2-1210mg/LPVDFPVDF/TiO2-2100mg/LPVDF/TiO2-3430mg/LPVDFPVDF/TiO2-1210mg/L2TiO2Fig.2EffectofTiO2solconcentrationonrejectionrateofmembrane1TiO2Tab.1EffectofTiO2soloncontactangleofmembraneaPVDFbPVDF/TiO2-1210mg/L3Fig.3Contactangleimagesofmembrane85°46°，：PVDF/TiO23——29PVDFTiO2.TiO2PVDF..2.2.3TiO25PVDF.5PVDF.PVDF/TiO2-1210mg/L50min95%.PVDF/TiO2-2100mg/LPVDF/TiO2-3430mg/L70%PVDF.2.3TiO22.3.16PVDFFT-IR.6PVDF610cm-1Ti-O-Ti[14]PVDFTiO23400cm-1[15].3TiO2PVDF/TiO2-1210mg/L.TiO2.2.3.27PVDFPVDF/TiO2-1210mg/L.7a7cPVDF7b7dPVDF/TiO2-1210mg/LTiO2TiO2PVDF.PVDFTiO2TiO2.3TiO2PVDF、、PVDF/TiO2.TiO2TiO2.TiO2.4——5BSAPVDF/TiO2-1PVDF63.8%90%.PVDF/TiO2-1210mg/L46.0°1BSAPVDFTiO2PVDFPVDFPVDF/TiO2-1210mg/L50min95%.FT-IRSEMTiO2PVDF.[1].[J].200620356-59.[2]OHSuJinKIMNowonLEEYongTaek.PreparationandcharacterizationofPVDF/TiO2organicinorganiccompositemembranesforfoulingresistanceimprovement[J].JournalofMembraneScience20093451/213-20.[3]CHOIJGBAETHKIMJHetal.Thebehaviorofmembranefoulinginitiationonthecrossflowmembranebioreactorsys－tem[J].JournalofMembraneScience20022031/2103-113.[4]MADAENISSGHAEMIN.Characterizationofself-cleaningROmembranescoatedwithTiO2particlesunderUVirradiation[J].JournalofMembraneScience20073031/2221-233.[5]LIUFXUYYZHUBKetal.Preparationofhydrophilicandfoulingresistantpolyvinylidenefluoridehollowfibermembranes[J].JournalofMembraneScience20093451/2331-339.[6]DAMODARRahulaYOUSheng-JieCHOUHui-Hsiang.Studytheselfcleaningantibacterialandphotocatalyticprop－ertiesofTiO2entrappedPVDFmembranes[J].JournalofHaz－ardousMaterials20091722/31321-1328.[7]ZHANGMGNGUYENQuangTrongPINGZH.Hy－drophilicmodificationofpolyvinylidenefluoridemicrop－orousmembrane[J].JournalofMembraneScience20093271/278-86.[8]MUCXSUYLSUNMPetal.Remarkableimprovementoftheperformanceofpolyvinylidenefluoridemicrofiltrationmembranesbytheadditiveofcelluloseacetate[J].JournalofMembraneScience20103501/2293-300.[9]RAHIMPOURAMADAENISSZERESHKISetal.Prepa－rationandcharacterizationofmodifiednano-porousPVDFmembranewithhighantifoulingpropertyusingUVphoto-graft－ing[J].AppliedSurfaceScience2009255167455-7461.[10]LUOMLZHAOJQTANGWetal.Hydrophilicmodifi－cationofpolyethersulfoneultrafiltrationmembranesurfacebyself-assemblyofTiO2nanopaticles[J].AppliedSurfaceScience20052491/2/3/476-84.[11]LEEWTKANGSTSHINHS.Sludgecharacteristicsandtheircontributiontomicrofiltrationinsubmergedmembranebioreactors[J].JournalofMembraneScience20032161/2217-227.[12]./TiO2[J].200827364-67.[13].[J].20082869-13.[14].HPC[J].2004191147-152