反渗透复合膜内界面改性对其性能的影响研究性能表征曹艳霞

　206Vol.20,No.6　200411POLYMERMATERIALSSCIENCEANDENGINEERINGNov.2004——(Ⅰ)曹艳霞1,2,郑国栋2,徐纪平2,沈家瑞1(1.,510640;2.,130022):用界面改性的方法研究了多孔支撑层/超薄功能层界面性质对反渗透复合膜性能的影响。采用了甲酸、磷酸、盐酸和弱极性试剂异丙醇作为聚砜底膜表面改性试剂。实验结果表明,在实验采用的不同的改性条件下,复合膜的性能都出现了大幅度的提高,改变改性试剂时,复合膜的性能变化有着相似的规律。改变改性试剂的浓度和改性时间有同样的改性效果。:;;:TB383　　　:A　　　:1000-7555(2004)06-0138-04　　1960Loeb-Sourirajin,。,,。,,。,,,。,,pH,,。2050,、、、、。,,,,,,Loeb-Sourirajan。。,、、。,(PSF)-Udel.P-3500[1]。,,。FT-30(98%～99%,6.9MPa),(=1.38m3/m2d),,。FT-30[2～4]。/,、/、[5～9],。。/:2002-12-10;:2004-05-12　:(59673012)　:(1973-),,.　:.DOI:10.16865/j.cnki.1000-7555.2004.06.035,,,。1　,,,,,pH=6～7,≤10μΨ,4℃。,2%3min→2min→0.3%1min→1min→(95℃～100℃7min)。:DDS-11A,(1.5×10-3),1.5MPa～2.0MPa。:　Flux=VH2O/VROCMtH2OVROCM22.48×10-4m2Rej=-,2h,40min,、、,。。(%)——;(m3/m2d)——Fig.1　PerformanceofcompositeROmembraneswhenSMtreatedby3mol/LHCl■:Rejection;○:Flux.Fig.2　PerformanceofcompositeROmembraneswhentheSMtreatedby3mol/LH3PO4■:Rejection;○:Flux.Fig.3　PerformanceofcompositeROmembraneswhentheSMtreatedby3mol/LHCOOH■:Rejection;○:Flux.Fig.4　PerformanceofcompositeROmembraneswhentheSMtreatedby20%IPA■:Rejection;○:Flux.;(×10-6h)——,。2　,FT-30。,。Fig.1～Fig.4。,139　6:(Ⅰ)。1d,,82.6%94%,,;,,5d。:(1),,3mol/L5d,;(2)5d,;(3),7d10d,。Fig.5　PerformanceofcompositeROmembraneswhenSMtreatedbydifferentconcentrationsofH3PO4for3days■:Rejection;○:Flux.Fig.6　PerformanceofcompositeROmembraneswhenSMtreatedbydifferentconcentrationsofIPAfor3days■:Rejection;○:Flux.,,,,,,,,,,Fig.5,Fig.6。4　:3mol/LHCl5d,Rej=97.1%,Flux=0.55m3/m2d;3mol/LH3PO45d,Rej=97.7%,Flux=0.57m3/m2d;3mol/LHCOOH7d,Rej=98.5%,Flux=0.48m3/m2d;20%IPA5d,Rej=97.5%,Flux=0.59m3/m2d。,,,。。:[1]　PetersenRJ.J.Membr.Sci.,1993,83:81～151.[2]　HiroseM,ItoH,KamiyamaY.J.Membr.Sci.,1996,121:209.[3]　MukhericeKD,GillWN.J.Membr.Sci.,1996,114:39.[4]　MukhericeDK,GillWN.J.Appl.Polym.Sci.,1996,60:483.[5]　WuSY,ZhengC,ZhengGD.J.Appl.Poly.Sci.,1996,61:1147.[6]　WuSY,ZhengC,ZhengGD.Polymer,1996,37:4193.[7]　(WUShao-yu),(ZHENGCan),(ZHENGGuo-dong).(ScienceBulletin),1996,4:383.[8]　(CHAOYan-xia),(ZHENGGuo-dong),(XUJi-ping).(ScienceBulletin),1998:23.[9]　(CHAOYan-xia),(ZHENGGuo-dong),(WUJi-cheng),.(JournalofFunctionalPolymer),1999,(1):97.1402004　EFFECTSOFINTERNALINTERFACEMODIFICATIONONTHEPERFORMANCEOFCOMPOSITEROMEMBRANES——(Ⅰ)PROPERTYANDCHARACTERIZATIONCAOYan-xia1,ZHENGGuo-dong2,XUJi-ping2,SHENJia-rui1(1.CollegeofMaterialScience&Engineering,SouthChinaUniversityofTechnology,Guangzhou510640,China;2.ChangchunInstituteofAppliedChemistry,ChineseAcademyofSciences,Changchun130022,China)ABSTRACT:TheeffectsofmodificationoftheinternalinterfacebetweenultrathinfilmandsupportmembraneontheperformanceofcompositeRO(reverseosmosis)membraneshavebeenstudiedbysurfacemodificationofPSFsupportmembranes.Polarreagentssuchashydrofluoricacid,phosphoricacid,formicacidand2-propanolwereusedassurfacemodificationreagents.Theresultsshowthatinallcasesboththesaltrejectionandthewaterfluxofthefinalcompositemembranedramaticallyincreaseinthebeginningstageofmodificationandthendecreaseslightlyafterwards.Thechangeinmodificationtimeorconcentrationofpolarreagentwouldresultinthesamemodifiedresults.Keywords:internalinterface;compositeROmembranes;surfacemodification(137。continuedfromp.137)THESTUDYONMORPHOLOGYANDSTRUCTUREOFEPOXYRESINTOUGHENEDBYLIQUIDPOLYSULFIDEPOLYUREAQUANYi-wu,DONGWen-zhao,CHENQing-min(DepartmentofPolymerScience&Engineering,NanjingUniversity,Nanjing210093,China)ABSTRACT:Liquidpolysulfidepolyureaoligomerswereusedtotoughenepoxy-polyamidesystem.ThemeasurementofDMTAandSEMwasusedtostudythemorphologyandstructureofthecuredepoxy,identifyingthedegreeofphasesegregationandtheeffectoftougheninginthecuredepoxy.Theresultsshowthatthelevelofpolysulfidepolyureaandthecontentofhardsegmentinpolysulfidepolyureainfluencethemorphology,Tgandmodulusofcuredepoxyresin.Withtheincreaseofthecontentofhardsegmentinpolysulfidepolyurea,thetoughness,Tg,phasesegregationandmodulusofcuredepoxyresinincreases.Keywords:liquidpolysulfide;polyurea;toughenedepoxyresin;morphologyandstructure141　6:(Ⅰ)