半互穿网络法亲水改性超滤膜

306Vol.30No.6201012MEMBRANESCIENCEANDTECHNOLOGYDec.2010半互穿网络法亲水改性超滤膜陈亚1,钱欣1,周勇2,高从堦2(1.,310014;2.,310012):以聚砜(PSF)为膜材料,水为凝胶剂,采用浸没沉淀相转化法制备PSF超滤膜,在制膜过程中添加了亲水性聚合物聚乙烯基吡咯烷酮(PVP)和络合剂FeCl2来改性PSF膜的亲水性,并对其性能进行表征.用红外来表征其络合性能,用接触角测量仪测定其亲水性能.探讨了PSF浓度,络合剂FeCl2用量,PVP用量,PVP分子量对超滤膜性能的影响.结果表明,增加PSF浓度,膜的通量变小;增加络合剂FeCl2的用量,膜的通量由大变小,是没有加络合剂的1.3倍;增加PVP的浓度,膜的亲水性得到了显著的提高.在4%的时候为最大,此时的通量比没加PVP的膜大11倍.而对于不同牌号的PVP,K60的通量最大,K90的最小.对牛血清蛋白(BSA)的截留率都达到了95%以上.:聚砜;水通量;聚乙烯基吡咯烷酮(PVP);络合剂:O631.1:A:1007-8924(2010)06-00014-06(PSF),pH(pH2~12),.PSF,,,,[1-4],PSF.,,.,[5-8],[9-10],[11].,,(,)[12-14].[15-16],[17],[18-21].,,.,.,,(,)(,),,,.,,,,,.,.PSF.PVP,PSF.PSFPVPPSF,,PVPPSF,PSF.:2009-10-19;:2009-12-21:(863)(2007AA030302);(973)(2009CB623402):(1986-),,,,[e-mail]46:#15#1实验部分1.1(PSF,1700),BASF;N,N-(AR),,;(BSA,Mn=67000),;(FeCl2,AR),,(PVP),;755B,;(RI200),ThermoNicolet;/(JC2000A),;(htmlHitachiS-4700),.(TOC-VCPN),.1.2,PVPFeCl2DMAc,40e.PVPFeCl2,PSF,.48h.,(20e,70%),,().1%NaHSO3.1.3PSF1.3.1PSFPVPFeCl2PSF,,,..,15~20nm,.1.3.2PSFPVP,70e24h,.JC2000A.,5,,.,,30e,,TOC,PVP.1.3.3PSFPSF,,0.3MPa30min,0.1MPa.:J=V/(A#t):J,L/(m2#h);V,m3;A,m2;t,h.1.3.4PSF,1%NaCl,0.1%,,.UVPC-755B,280nm..:R=(1-A/Ab)@100%:R,%;A;Ab.2实验结果与讨论2.1PVPPSFPVP,NH,3330cm-1.1650.7cm-1CO.3400~3500cm-1PVP().,PVPCO,,Cl-1CO,(1656.7cm-1)[22].1,FeCl2PVP.2PSF1PVPFeCl2Fig.1IRspectraofPVPandFeCl2#16#30,2,,.PVPFeCl2,.(b)PVPFeCl2,,,PVP,,,2(a)(c).(a)(c),FeCl2,.2PSFFig.2SEMpicturesofcrosssectionandinnersurfaceforPSFmembrance2.2PSFPVPPSF,.3PVP.PSF(18%),PVP,PSF.,PVP,,.PVP,PVPPSF.,PVP,FeCl2,PVP,,PVPPSF,PVP,.,PVP4%,PVP4%PSF,4%,(7).3PVPFig.3EffectofPVPconcentrationoncontactangle4PSFPVP,4,FeCl2PSF,PVPFeCl2,FeCl2PVP,PVPPSF,,.4PVPFig.4DissolutionexperimentsofPVP2.3PSF2.3.1PSFPSF5,PSF,.PSF,,,,PSF,.PSF10%,PSF,6:#17#.5PSFFig.5EffectofPSFconcentrationonwaterflux2.3.2FeCl26,FeCl2,.FeCl2PVP,PVP.PVP,,,.FeCl20.5%,PVP,,,.FeCl2,FeCl2PVP,PVPPSF,,,,PVP,,,.6FeCl2Fig.6EffectofFeCl2concentrationonwaterflux2.3.3PVPPVP,,PVPPSF,PVP,PVP,.FeCl2,PVPFeCl2,.7PVP,PVPPSF,,17.7L/(m2#h),2%PVP147.4L/(m2#h).,PSF,PVP,,PVP,,,PVP,.PVPPSF,,PVP.PVP,.,PVP,,,PVP,,.7PVPFig.7EffectofPVPconcentrationonwaterflux2.3.4PVPPVP,.8PVP.K15K90,,K90,K60.K15,,PVP,PSF,.K60,,FeCl2,PSF,,.K90,,PVPPSFK30,#18#30,,,PVPK90K30,,,,.K30,,,K30.K30PSF.8PVPFig.8EffectofmolecularweightofPVPonwaterflux2.4PSF12,PSFBAS,95%.1PVP,,PVP,,PVP0,,,...2,,.,,.3PVP,K60,K90,PVP表1PVP浓度对截留率的影响Table1Effectofpvpconcentrationonrejectionratew(PVP)/%02468/%95.1896.4195.5995.9895.94表2络合剂FeCl2浓度对截留率的影响Table2EffectofFeCl2concentrationonrejectionratewFeCl2/%00.511.52/%96.6796.4195.7496.3895.64,.表3PVP的牌号对截留率的影响Table3EffectofPVPbrandonrejectionratePVPK15K30K60K90/%96.596.4195.896.73结论L-S,PSF,DMAc,.PVPFeCl2.,:1)PVPFeCl2,FeCl2PVPPSF,PSF,PSF.2)PSFPVP,:PSF,;,;PVP,;PVP,,K60.3)PVP,BSA95%,,,BSA95%.PSFBSA.[1]QinJJ,WongFS,LiuY,etal.Ahighfluxultrafi-ltrationmembranespunfromPSF/PVP(k90)/DMF/1,2-propanediol[J].JMembrSci,2003,211:139-147.[2],,./[J].,2005,25(3):5-9.[3]YooJE,KimJH,KimY,etal.Novelultrafiltr-ationmembranespreparedfromthenewmiscibleblendsofpolysulfonewithpoly(1-vinylpyrro-lidone-co-sty-rene)copolymers[J].JMembrSci,2003,216:95-106.[4],,,.PSF/PEG[J].,2006,27(4),298-301.[5]PalS,GhatakSK,Das-GuptaS.CharacterizationofCO2plasmatreatedpolymericmembranesandquantif-i6:#19#cationoffluxenhancement[J].JMembrSci,2008,323:1-10.[6]UlbrichtBelfortGJ.Sufacemodificationofultra-filtra-tionmembrancesbylowtemperatureplasma[J].Mem-brSci,1996,111(2):193-215.[7]KimKS,LeeKH,ChoK,etal.Sufacemodif-icationofpolysulfoneultrafiltrationmemb-rancebyoxygenplasmatreatment[J].JMembrSci,2002,199(4):135-145..[8],.[J].,2000,14(3):314-317.[9]UlbrichtM,MotuschewskH,CechelA,etal.Photo-inducedgraftpoly-merrrizationsurfacemodificationsfortheprepa-rationofhydrophilicandlow-protein-adsor-bingultrafiltrationmemebranes[J].JMembrSci,1996,115(12):31-47.[10],,,.[J].,1998,18(5):50-54.[11]KomakiY.Radicalsinheavyion-irradiatedpolyvinyl-idenefluoride[J],RadiatMeans,1996,26(1):123-129.[12],.[J].,1998,24(5):265-269.[13]HanS,Membranes&MembraneProcesses[M].NewYork:PlenumPress,NY,1986:143-150.[14],,.[J].2007,58(6):1501-1506.[15]MorelG,QuazzaniN,GraciaaA,etal.Sufact-antmodifiedultrafiltrationfornitrateionremoval[J].JMembrSci,1997,134(7):47-57.[16],,.[J].,1989,5(2):87-92.[17],,.PVA/PS[J].2003,31(11):957-961.[18],.[J].,2001,21(2):10-13.[19],,.-[J].,1993,12(6):458-462.[20],,,.(SPES)/(PES)[J].,2000,19(4):16-19.[21],,.[J].,2002,19(1):32-36.[23].[M].:,1991:342-346.Hydrophilicmodificationofpolysulfoneultrafiltrationmembranesbysem-iIPNmethodCHENYa1,QIANXin1,ZHOUYong2,GAOCongjie2(1.InstituteofMaterials,ZhejiangUniversityofTechnology,Hangzhou310014,China:2.DevelopmentCenterofWaterTreatmentTechnology,Hangzhou,Hangzhou310012,China)Abstract:PolysulfoneblendmembraneswerefabricatedbyphaseinversionprocessfromcastingsolutionofPSF,withpurewaterasnon-solvent.PolyvinylpyrrolidoneandFeCl2wereaddedintocastingsolutioninordertoimprovethehydrophilicbehaviourofpolysulfonemembraneinmembraneprocess.ComplextioncharacterizationwasdeterminedbyIRandSEM,hydrophiliccharacterizationwasdetectedbyconta