低截留分子量PPES超滤膜的制备

Vol.21No.320089JournalofFunctionalPolymers:20080313:973(2003CB615700):(1983),,,,Email:[e-mail]:,Email:[e-mail]高嵩,张守海,杨大令,孙杨,蹇锡高(大连理工大学化工学院,辽宁省高性能树脂工程技术研究中心,辽宁大连116012):以杂萘联苯聚醚砜(PPES)为膜材料N甲基吡咯烷酮(NMP)为溶剂有机小分子丙醇(PrOH)和无机小分子氯化锂(LiCl)作为混合添加剂,采用相转化法制备超滤膜研究了聚合物浓度混合添加剂配比凝胶浴温度等对膜结构和性能的影响结果表明:随聚合物浓度的增大,膜的纯水通量下降,截留率升高;混合添加剂,在PrOH含量为12%LiCl含量为1.5%时,可制得纯水通量为252L/(m2!h),对聚乙二醇1000(PEG1000)截留率为96%的超滤膜;随凝胶浴温度的升高,膜的纯水通量增加:杂萘联苯聚醚砜;低截留分子质量;超滤膜:TQ028.8:A:10089357(2008)03031705PreparationofPoly(PhthalazinoneEtherSulfone)UltrafiltrationMembranewithLowMolecularWeightCutOffGAOSong,ZHANGShouhai,YANGDaling,SUNYang,JIANXigao(LiaoningResearchCenterofHighPerformanceResinEngineeringandTechnology,CollegeofChemicalEngineering,DalianUniversityofTechnology,Dalian116012,Liaoning,China)Abstract:Byusingpoly(phthalazinoneethersulfone)(PPES)asmembranematerial,NMPassolventandorganicsubstancePrOHandinorganicsubstanceLiClmixtureasadditive,theultrafiltrationmembraneswerepreparedwithaphaseinversiontechnique.Effectsofthepolymerconcentration,thecontentofPrOHandLiClinadditiveandgelbathtemperatureonmembrane∀sstructureandperformancewerestudied.Resultsshowthatwaterfluxesofthemembranedecreasewiththeincreasingofpolymerconcentration,whiletherejectionrateincrease.WiththecontentofPrOH12%,LiCl1.5%asadditive,themembranewithhighwaterflux252L/(m2!h)andhighPEG1000rejectionrate96%isprepared.Thewaterfluxesofthemembranealsoincreasewiththeincreasingofgelbathtemperature.Keywords:PPES;lowmolecularweightcutoff;ultrafiltrationmembrane,[1],,,(MWCO5000),,,[2~7]/,[8][9~10][11]317,(PPES),:PPES,N(NMP),(PrOH)(LiCl),11.1PPES:[]=0.54,;N(NMP):,;(PrOH)(LiCl);1000(PEG1000)2000(PEG2000),751,;(40.7cm2),1.2PPESNMP,,,,,15s,,,24h,1.31.3.1,0.2MPa,30min,0.1MPa(F),(1)F=QAt(1),F(L/(m2!h));Q(L);A(m2);tQ(h)1.3.2100mg/LPEG1000PEG2000661nm562nm[12],(2)(R):R=(1-cp/cf)#100%(2),R;cp(mg/L);cf(mg/L)1.4,,OxfordJEOLJSM5600LV(SEM)22.11PPES,,,31821,,,,,,Fig.1EffectofPPESconcentrationonUFmembranesperformanceFig.2EffectofLiClcontentonUFmembranesperformance2.22.2.1LiClNMP,w(PPES)=0.15,w(PrOH)=0.12,LiCl(2)w(LiCl)00.02,,w(LiCl)=0.015,PEG20003LiCl,LiCl,,,,,,,[13],,,;,,,LiCl,LiCl,,,,;[14],Fig.3EffectofLiClcontentonUFmembranesstructurew(LiCl):a∃0;b∃0.005;c∃0.010;d∃0.015;e∃0.0202.2.2PrOHNMP,w(PPES)=0.15,w(LiCl)=0.015,PrOH(4)w(PrOH)00.16,,PEG2000,PEG1000w(PrOH)=0.12,3193,:PPESFig.4EffectofPrOHcontentonUFmembranesperformance5PrOHw(PrOH)=0.04,,;w(PrOH)=0.12,,,;w(PrOH)=0.16,,,,,,PrOH,,,,,,,[15],Fig.5EffectofPrOHcontentonUFmembranestructurew(PrOH):a∃0;b∃0.04;c∃0.08;d∃0.12;e∃0.16,,∃OH,,,,,[16],LiCl,,,,Fig.6EffectofgelationtempratureonUFmembraneperformance2.36,,,,PEG2000,,,,;,,,,,320213(1)PPES,NMP,PrOHLiCl,,,(2)LiCl,;PrOH,,PEG1000;w(PPES)=0.15,w(PrOH)=0.12,w(LiCl)=0.015,252L/(m2!h),PEG100096%(3)0~30%,,:[1],,.[M].:,2001.357361.[2],.PVDF[J].,1994,25(2):8386.[3],.[J].,1998,24(5):265269.[4],,.(&)[J].,2001,18(1):1821.[5],,,.[J].,2003,23(7):3740.[6]KhanS,GhoshAK,RamachandhranV,etal.Synthesisandcharacterizationoflowmolecularweightcutoffultrafiltrationmembranesfromcellulosepropionatepolymer[J].Desalination,2000,128:5766.[7]InChulKim,HyungGuYun,KewHoLee.Preparationofasymmetricpolyacrylonitrilemembranewithsmallporesizebyphaseinversionandposttreatmentprocess[J].JournalofMembraneScience,2002,199:7584.[8],,,.PPESK[J].,2007,(7):615620.[9]YangYongqiang,YangDaling,ZhangShouhai,etal.Preparationandcharacterizationofpoly(phthalazinoneethersulfoneketone)hollowfiberultrafiltrationmembraneswithexcellentthermalstability[J].JournalofMembraneScience,2006,280:957968.[10]YangYongqiang,JianXigao,YangDaling,etal.Poly(phthalazinoneethersulfoneketone)(PPESK)hollowfiberasymmetricnanofiltrationmembranes:Preparation,morphologiesandproperties[J].JournalofMembraneScience,2006,270:112.[11],,,.[J].,2005,18(1):105111.[12],,,.[J].,2004,(5):3637.[13].[J].,2005,24(5):14.[14],,.[J].,2000,13(2):3538.[15],.[J].,1998,18(3):4348.[16],,.PAN[J].,1997,17(4):4650.3213,:PPES