PVDFPVC膜化学稳定性研究高春梅

29　120081　　　JournalofTextileResearchVol.29　No.1Jan.　2008:0253-9721(2008)01-0017-05PVDFPVC高春梅1,孟彦宾2,奚旦立3(1.,　200090;2.,　201812;3.,　200051)　　PVDFPVC,。:PVDFPVC,,;PVDFPVC,。,,,,PVDFPVC。　PVDF;PVC;;;:X703　　　:A　　　StudyonthechemicalstabilityofPVDFPVCmembraneGAOChunmei1,MENGYanbin2,XIDanli3(1.CollegeofMarineScienceandTechnology,ShanghaiFisheriesUniversity,Shanghai　200090,China;2.ShanghaiBurginStationerylo.Ltd.,Shanghai　201812,China;3.CollegeofEnvironmentalScienceandEngineering,DonghuaUniversity,Shanghai　200051,China)Abstract　ThechemicalstabilityofPVDFPVCmembranebydry-wetspinningprocesswasstudied.TheresultsshowedthatthefluxofPVDFPVCmembraneincreasedaftercleaningwithsodiumhypochloritesolutionandtheextentofincreasewasrelatedtotheconcentrationofthesolutionandactingtime;PVDFPVCmembraneexhibitsedbetterresistanttoacidandoxidizingthantoalkali.Inaddition,cleaningofthefouledmembranewasstudiedanditwasfoundthatchemicalcleaningwasmoreeffectivethanhydrauliccleaning.Theanti-foulingpropertyofthemembraneshouldbefurtherimproved.ThispaperhasprovidedtheoreticalbasisforapplicationsofPVDFPVChollowfibermembrane.Keywords　PVDF;PVC;hollowfibermembrane;chemicalstability;membranefouling:2007-04-28　　　:2007-09-06:上海高校选拔培养优秀青年教师科研专项基金(06KZ011);上海市教育委员会科研项目(科06-425):高春梅(1976—),女,讲师。主要从事水污染控制工程研究。E-mail:[e-mail]。　　。(PVDF),、、,,,,[1-2],PVDF、、[3-4]。PVDF,,,(),,,,。PVDF,[5-8],,PVDF。PVDFPVC,PVDFPVC,PVDFPVC,PVDFPVC。DOI:10.13475/j.fzxb.2008.01.0261　1.1　(PVDF,FR904),;(PVC),3～6,;(BSA),6.7,,();(C3H8O3),92.09,();;;;;pH。1.2　JSM-5600LV、、。1.3　PVDFPVC,DMAC,PVP(K30),2.5MPa,6cm,80℃,25℃,,48h,50%24h,,。1.4　[9]JW;;,JSM-5600LV。2　2.1　70%DMAC,,,。24h,41、3、5、7gLNaClO,NaClO50%24h,,、;24h,50%24h,,,NaClO。NaClO1、2。1NaClO,1。NaClO1　NaClOFig.1　InfluenceofNaClOsolutiononmembranepermeation　2　NaClOFig.2　InfluenceofNaClOsolutiononmembranestructure.(a)Outersurfacebeforetreatment;(b)Outersurfaceaftertreatment;(c)Innersurfacebeforetreatment;(d)Inner　　　surfaceaftertreatment　5gL,,,36h,NaClO5gL,。:1)2,7gLNaClO,,,,;2)PVP,,NaClO,PVP,[10];3),,[11],,,。,·18·29,。2.2　70%DMAC,,。24h,3、、312h,24h,50%24h,,1。1　PVDFPVCTab.1　ChemicalstabilityofPVDFPVCmembrane(L·m-2·h-1)μm435.6452.33.80.290.303.4429.5512.519.30.290.3210.3438.3475.68.50.290.316.9　　:pH1～2,pH13～14,1%。　　1,PVDFPVC、、,,11%,、。,,20%。、10%,20%。,PVDFPVC,,。2.3　PVDFPVC70%DMAC,,。0.29μm,0.6mm,0.3mm,0.1MPa,0.1%,,PVDFPVC,3。3　Fig.3　DiagramofBSApermeationspeedwithtime　3,,,,150min,,[12]。31～300min,4。,m=0.3977L(m2·h·min),,PVDFPVC,。、、。PVDFPVC,,,。4　PVDFPVCFig.4　BSAsolutionattenuationwithPVDFPVCmembranefiltration　2.4　PVDFPVCPVDFPVC,PVDFPVC,。;pH4～524h,;pH11～1224h,;24h。,。5。6。5,。,,。,,。6,,,,。,、·19·1:PVDFPVC　5　Fig.5　SEMimagesofmembraneafterwatercleanout.(a)Outersurface;(b)Section　6　Fig.6　SEMimagesofmembraneafterlyemarination.(a)Outersurface;(b)Section　,。,。7。7　Fig.7　Relationbetweenmembranefluxandpressuredifference　28.64L(m2·h·m),83.8%,。。。、。,,,,,[13]。3　　1)PVDFPVC,3～7gL36～48h,。、、PVDFPVC,,。2)PVDFPVC,,,。3):,;,,。83.8%。PVDFPVCPVDFPVC,PVDFPVC。FZXB:[1]　,,.[J].,2003,22(8):808-812.[2]　,,.PVDF[J].,2003(6):852-857.[3]　,,,.[J].,2003,22(11):1165-1171.[4]　,,,.γ-(I)-[J].,2003,24(5):935-939.[5]　.CTAPVDF[J].,2005,31(12):8-10.[6]　,,.PVDFPS[J].,2005,25(5):10-14.[7]　,,,.PVDFPMMACA[J].,2005,25(3):63-67.[8]　,,,.PVDFCA·20·29[J].,2002,22(6):4-8.[9]　,,,.PANCA[J].,1998,18(4):42-45.[10]　JianJunQin,FookSin,YingLi,etal.AhighfluxultrafiltrationmembranespunfromPSUPVP(K90)DMF1,2-propanediol[J].JournalofMembraneScience,2003,211:139-147.[11]　,,,.[J].,2007,28(1):5-9.[12]　.[M].:,1994:33.[13]　,,.[J].,2000(3):24-26.(上接第16页)[3]　,,,.·[M].:,2002:21-23.[4]　.[J].:,2000,46(2):18l-186.[5]　.[J].,2004,1(6):32-41.[6]　AllingerNL,CavaMP,JonghDC,etal.OrganicChemistry[M].NewYork:WorthPublishersInc,1976:544.[7]　.[J].,2004,7(5):98-99.[8]　,,.[J].,2004(6):31-35.·21·1:PVDFPVC