SiO2PSf杂化超滤膜制备和性能研究

304Vol.30No.420108MEMBRANESCIENCEANDTECHNOLOGYAug.2010SiO2/PSf杂化超滤膜制备和性能研究于海琴,李永华,赵宏峥(,100044):分别以粉末和溶胶-凝胶的方式向聚砜铸膜液中添加不同含量的SiO2,通过LS相转换法制备SiO2/PSf杂化超滤膜.比较两种体系在不同SiO2含量下铸膜液的稳定性黏度,及膜的微观结构平均孔径孔隙率渗透性能和机械性能.结果表明,以溶胶-凝胶方式添加SiO2的铸膜液更加稳定,各方面性能更好.粉末添加下SiO2含量为2%时效果较好,水接触角为62,纯水通量为141L/(m2h),对腐殖酸(Mr=370000)的截留率为83.7%;溶胶-凝胶添加下SiO2含量为8%~10%时效果较好,水接触角为40,纯水通量为182L/(m2h),对腐殖酸(Mr=370000)的截留率为92%.:超滤膜;聚砜(PSf);纳米SiO2;正硅酸乙酯TEOS:TQ028.8:A:10078924(2010)04002806(PSf)pH(2~12),,.,,,.,.[1].,.,PVDFTiO2SiO2/,[2.3].SiO2,.SDSSiO2[4].,SiO2,.SiO2(TEOS)SiO2,LSPSf/SiO2,SiO2.1试验仪器材料与方法1.1,;UVPC-240,;,;,;CSl01-1,;JJ0-2,;,EIQuanta200-EDAXGenesis2000;6L,Haak.1.2(PSf,=0.67),;(PVP,K30),;N-N(DMAc,),;N-2-(NMP,),;(SDS),;(TEOS),;SiO2:20090507;:20100126:(1965),,,,!.∀[e-mail]!4:SiO2/PSf29(Mr=3000),;KH560;(Mr=37000),.2试验内容和方法2.1SiO2SiO2,,.SiO2,,SiO2.(SDS)SiO2,,SiO2[5].SiO2:1gSiO2,200mL0.7%SDS,pH4,6h,,,SiO2.2.2SiO2SiO2SiO2,SiO2SiO2.(TEOS)1#2#4,HClpH1~2,70∃10hSiO2[4].2.3PSf/SiO2:(1)++PVP+SiO2+;(2)++PVP+SiO2+.,18%;DMAcNMP(VDMAc#VNMP=4#1);PVP,,,,4%;SiO2/SiO2,SiO20%,2%,4%,6%,8%,10%;(KH560)6%,,SiO2.,60∃,SiO2,24h,PSf/SiO2.2.4PSf/SiO2PSf/SiO2(200m),,(20%/)24h,1%.2.52.5.1PSf/SiO22d,SiO2.2.5.2PSf/SiO26L,20∃,SiO2,20min.,.2.5.3PSf/SiO2-54∃PSf/SiO2,.2.5.4PSf/SiO2(Pr).20∃,Pr=Ww-WdS%d%dm:Pr,%;Ww,g;Wd,g;S,cm2;d,mm;dm,g/cm3.2.5.5PSf/SiO260∃24h,,SiO2.2.5.6PSf/SiO219.6cm2,0.2MPa30min,3m/s,UVPC-240PSf/SiO2(Mr=370000,0.1g/L).UV2550,-,R:3030R=CF-CPCF%100%=A0-AA0%100%,CF,mol/L;Cp,mol/L.2.5.7PSf/SiO2,,,,(19.6cm2)(MPa),.3结果与讨论3.1SiO2PSf2.SiO2,SiO28%10%,-SiO2SiO210%,.,-SiO2SiO2.SiO2,SiO2;SiO2,.-SiO2,SiO2SiO2,SiO2,.3.2SiO2,.,,.SiO21,,-SiO2,SiO22%.SiO22%.2%,SiO2.SiO2PSf[6],SiO2PSf.1-SiO2.SiO2,-SiO2,PSf.,.,SiO2,.1SiO2Fig.1TheviscosityofthesuspensionsasfunctionoftheSiO2concentration3.3PSf/SiO22SiO2.,SiO2,SiO2,.1,SiO22%,SiO2SiO2,.2,SiO2,.3.4PSf/SiO2(Pr)3.2,SiO2,0%~2%SiO2,,.2%~6%SiO2,,.6%~10%SiO2,,.SiO2,..,.SiO2,,,,.SiO2,,4:SiO2/PSf312SiO2(100000)Fig.2SEMimagesoftheskinlayersurfaces(magnified100,000%)membraneswithdifferentSiO2concentrations..3SiO2Fig.3ThemeanporesizeandporosityoftheSiO2/PSfcompositeultrafiltrationmembraneasafunctionofSiO2concentration-,SiO20%~4%,,;SiO24%~8%,,;SiO2,.,,,PSf,[7];,SiO2,,PSf,.SiO2.3.5PSf/SiO2,.1,1SiO26%,SiO2,;SiO2,.2SiO2.SiO2.1,SiO2,,SiO2.表1SiO2浓度对超滤膜亲水性的影响Table1ContactangleofSiO2/PSfmembranewithdifferentSiO2concentrations12w(SiO2)/%/()w(SiO2)/%/()0750752622594494446476428548401062103832303.6PSf/SiO24,1SiO22%,SiO2,;SiO22%~6%,,;SiO2,,.SiO2,SiO2,,.SiO2,,,.SiO2,SiO2,,.2,SiO20%~8%,.SiO28%,.-SiO2.4SiO2Fig.4TheeffectofSiO2concentrationonmembraneUFperformances3.7PSf/SiO22.表2SiO2浓度对超滤膜机械性能的影响Table2ThemechanicalpropertiesofPSf/SiO2membranewithdifferentSiO2concentrations12w(SiO2)/%/MPaw(SiO2)/%/MPa00.3200.3320.3420.3540.3540.3660.3760.3780.3380.38100.31100.382,1SiO26%,SiO2.SiO2PSf,SiO2,,..SiO2,,,.,.SiO2SiO2.4结论-SiO2.,SiO2,,.-SiO2,..SiO2,SiO22%,0.2MPa141L/(m2h),83.7%,62;-SiO2,SiO28%~10%,0.2MPa182L/(m2h),92%,40.SiO2,SiO2.4:SiO2/PSf33,.[1].[J].,2005,7(5):26-29.[2]GoossensI,HauteAVan.Theinfluenceofmineralfillersonthemembranepropertiesofhighfluxasymmetriccelluloseacetatereverseosmosismembranes[J].Desalination,1976,18:203-214.[3]WangShu(),ChuLiangyin(禇良银),ChenWenmei(),etal.Studyonorganic/inorganiccompositeantifoulingmembraneforoil/waterseparations(/)[J].JChemEngofChineseUniv(),2005,19(2):11-16.[4]ZhangZH,ShenZ,ShaoCS.Theadsorptionandorganicmodificationoftitamiumdioxide[J].ChinaSurfactantDetergent&Cosmetics,1997,(5):13-15.[5]IlerRK.ChemistryofSilica[M].NewYork:Wiley,1979.[6],,./TiO2-[J].,2007,5(21):766-771.[7]JangYunpeng().PreperationandapplicationofPVA/SiO2compositeultrafiltration(PVA/SiO2)[D].Tianjin():TianjinUniversity(),2002.PreparationandcharacterizationofSiO2/PSforgano-mineralcompositeultrafiltrationmembraneYUHaiqin,LIYonghua,ZHAOHongzheng(DepartmentofMunicipal&EnvironmentalEngineering,BeijingJiaotongUniversity,Beijing100044,China)Abstract:Viathephaseinversionprocess,compositeSiO2/PSfultrafiltrationmembraneswithdifferentSiO2concentrationswerepreparedbythetwowaysofpowderandsolgel.Thepropertiesofthecompositemembranesprepared,suchastheultrafiltration(UF)performance,stability,hydrophilicity,viscosity,foulingresistance,mechanicalstrengthandstructure,weremeasuredbyappropriateinstruments,andtheinfluenceofSiO2contentandaddingwaysontheperformancesofthepreparedcompositemembraneswasinvestigated.Theresultsshowthattheultrafiltration(UF)performanceofcompositemembraneswhichaddedSiO2bythewayofsolgelisbetter.WhenSiO2concentrationbeing2%bypowder,thewatercontactanglewas62,purewaterfluxwas141L/(m2h),theperformanceofcompositeultrafiltrationmembranesisbest,inwhichtheretentionrateofhumicacidwas83.7%,whilewhenSiO2concentrationbeing8%~10%bysolgelthewatercontactanglewas40,purewaterfluxwas182L/(m2h),thewayofsolgelmakestheperformanceofcompositeultrafiltrationmembranesbest,inwhichtheretentionrateofhumicacidwas92%.Keywords:ultrafiltrationmembrane;polysulfone;nanoSiO2;TEOS&∋&∋(),[e-mail]@chinabluestar.com,,20115..()