UV辐照接枝聚合制备亲水性纳滤膜

200664Vol.64,200619,20272032ACTACHIMICASINICANo.19,20272032*E-mail:[e-mail]19,2005;revisedApril26,2006;acceptedJune23,2006.973(No.2003CB615702)(No.20374014).··UV*(200433)(PEK-C).,Donnan.,(AA)(SSS),,.UV;;;;PreparationofHydrophilicChargedNanofiltrationMembranebyUVIrradiationGraftPolymerizationSHE,ZhenYIN,Guan-NanPING,Zheng-Hua*(KeyLaboratoryofMolecularEngineeringofPolymers,MinistryofEducation,DepartmentofMacromoleculeScience,FudanUniversity,Shanghai200433)AbstractAnovelhydrophilicchargednanofiltrationmembranewaspreparedviaUVirradiationgraftpo-lymerizationonthepolyetherketone-cadro(PEK-C)ultrafiltrationmembrane.TheinfluenceofgraftingmonomernatureonthesaltrejectionofthemembraneshowedtheeffectofDonnaninteractiononthemem-braneperformancesinnanofiltration.Basedonthisphenomenon,graftcopolymerizationwithsodiumstyre-nesulfate(SSS)andacrylicacid(AA)hasbeenappliedtothemodificationofPEK-Cmembranes.Byad-justingthemolarratioofthemonomersananofiltrationmembranewithhigherperformancehasbeenob-tained.KeywordsUVirradiation;polyetherketone-cadro;surfacechargednanofiltrationmembrane;sodiumstyrenesulfonate;acrylicacid(Nanofiltrationmembrane,NFM),300,[13].[4,5][6].,.,.,.,,,.,,.[7,8],(polyetherketone-cadro,PEK-C)(acrylicacid,AA).,AA2028Vol.64,2006,,,,,,.,(sodiumstyrenesulfonate,SSS).,,.11.1(PEK-C),,.(SSS),,,.(AA),,,.CuSO4•5H2O,,.1.2PEK-CPEK-C[8].DMF,.0.2MPa160L•m2•h1,10000.Na2SO4.1.PEK-C45,3,10mL.2,1cm,300nmUV.17cm.365nm8.7mW•cm2.5min,..,/,15min,3,.5%Na2SO42h,.,.1.31.3.1ATR-FTIRPEK-C()NICOLETNexus470,(ATR-FTIR).ZnSe,45°.128,4cm1.501Figure1UV-graftingdevice1UVlamp;2saturatedCuSO4solution;3monomersolution;4membrane;5PTFEholder;6N224h.SSSAA(GQ)[8]:1036SSS1183GQAA(1)1720AA1183GQAA(2)A1183CO1183cm1,A1036SSSSO1036cm1,A1720AACO1720cm1.1.3.2,15.9cm2.25,0.5MPa.Na2SO4w0.1%,pH7.0.Na2SO4DDS-11A.,JVRobv:VVJAt∆∆(3)pobsf1100%CRC⎛⎞⎜⎟⎝⎠(4),JV(L•m2•h1),V(L),A(m2),∆t(h),Cf,Cp(%).1.3.3,1mol/LHCl24h,SO3NaCOONaNo.19UV2029SO3HCOOH.,,,100mL5%Na2SO4,12h.,.,0.01mol/LNaOHH.NaOH,SO3HCOOH,σ(C•m2).()()ANaOHNaOHcVNeneAAσ,n,e(:C),c(NaOH)(mol•mL1),V(NaOH)(mL),A(m2),NA.1.3.4(GelPermeationChromatography,GPC),,.Agilent1100.10mL,SSSAA0.1%.5min,,7010min..,GPC.1.3.5DataPhysicsOCA15PEK-C.,.3°.1.3.6SEM,,,TSM5136,5000.2PEK-CScheme1..,NorrishII[8,9].1PEK-CScheme1ChemicalstructureofPEK-C2.1AAPEK-C5%AAUV5min,.0.5MPa0.1%Na2SO4,85.9%,,2.8L•m2•h1(1).1pHSSSTable1EffectofpHonSSSgraftedmembraneperformances(25,0.5MPa)MonomerandpHPermeationflux/(L•h1•m2)Rejection/%5%AA,pH32.885.910%SSS,pH142.481.110%SSS,pH9400.018.6AA,,(COOH)H.,,.,Na2SO45%,,10.,UVAAPEK-C24SO.,AA,.,,.,AAPEK-C,,,.2.2SSSAA,[8],,.,,.,,,[8].22030Vol.64,2006AASEM.,5%AA,(2b).2PEK-C(a)5%AA(b)SEMFigure2SEMphotographsofPEK-Cmembrane(a)and5%AAgraftedmembrane(b),,,,.[10],(SSS)PEK-C.(2),SSSAA,12.1°.,,[11].2PEK-CTable2StaticcontactangleofPEK-CmembranemodifiedwithdifferentmonomersGraftingmonomerStaticcontactangle/(°)67.35%AA64.210%SSS12.1SSSPEK-C,,10%SSS10min,.5%AA,(4%),,AA15(1).PEK-C.SSS,,pHSSS[12].pH,,,pH(pH1),,81.1%.pH(pH9),,18.6%,400L•m2•h1.pH,SSS.,.(3SO),,.,(SO3H),,,SSS.,pH11.2104ion•nm2,pH90.8104ion•nm2,,SSSPEK-C,.,,,SSS,(1).pHSSSPEK-C,,.,,,,.2.3SSSAASSSpH,AA,,.,,,,.,SSS,AA.,SSS,,.No.19UV2031SSSAASSS.,AA,SSS.,AA,.SSSAA(3).3SSS/AAPEK-CFigure3NanofiltrationperformancesofPEK-CmembranemodifiedwithdifferentSSS/AAmolarratioGraftingsolution:10%monomer,UVintensity:8.14mW•cm2,SSS..,SSSAA2,(90%),AA.,AA8,23.3L•m2•h1..4,SSS/AA,SSSAAPEK-C(3).,,,.3,,SSS,SSS.(3),.4PEK-CFigure4ATR-FTIRspectraofPEK-Cmembranegraftedwithdifferentmonomers(a)5%AA;(be):n(SSS)/n(AA)0.33,1;2,3;(f)10%SSS;(g)unmodifiedmembrane3SSSAAPEK-CTable3IRrelativegraftingratioofPEK-CmembranewithdifferentSSS/AAration(SSS)n(AA)GQS(A1036/A1183)GQA(A1720/A1183)GQSGQA0.3314.8%31.2%46.0%123.5%12.3%35.8%226.3%10.1%36.4%322.8%5.4%28.2%n(SSS)/n(AA)2,,,.,.4PEK-C.PEK-C1770cm1,1580,1495cm1CC,1240,1183cm1CO10001029cm1CH.AA,17201706cm1.SSS1126,1036cm1SO.4SSSAA.3,AAAA.SSSn(SSS)/n(AA)2(3).,.2032Vol.64,2006,5.,.,,.5PEK-CFigure5SurfacechargedensityofPEK-Cmembranewithdifferentgraftcomposition3,.,.,,.SSSAA,SSSAA2,.,SSS,.,.References1Du,R.H.;Zhao,J.S.J.Appl.Polym.Sci.2004,91,2721.2Koyuncu,I.J.Chem.Technol.Biotechol.2003,78,12193Hilal,N.;Al-Zoubi,H.;Darwish,N.A.;Mohamma,A.W.;AbuArabi,M.Desalination2004,170,281.4Lu,X.F.;Bian,X.K.;Shi,L.Q.J.Membr.Sci.2002,210,3.5Zhang,W.;He,G.H.;Gao,P.;Chen,G.H.Sep.Purif.Technol.2003,30,27.6Kim,I.C.;Lee,K.H.;Tak,T.M.J.Membr.Sci.2001,183,253.7Qiu,C.Q.;Zhang,L.H.;Ping,Z.H.ActaChim.Sinica2005,63,1906(inChinese).(,,,,2005,63,1906.)8Qiu,C.Q.;Xu,F.;Nguyen,Q.T.;Ping,Z.H.J.Membr.Sci.2005,255,1079Shen,Y.J.;Zhong,H.;Wu,G.X.Tech.Equip.Environ.Pollut.Control.2001,6,31(inChinese).(,,,,2001,6,31.)10Choi,J.;Rubner,M.F.Macromolecules2005,38,116.11Chu,L.Y.;Wang,S.;Chen,W.M.Macromol.Chem.Phys.2005,206,1934.12Zhu,J.H.;Qiu,S.L.;Ye,Y.;Yao,S.D.J.Radiat.Res.Ra-diat.Proc.2002,22,178(inChinese).(,,,,,2002,22,178.)(A0511192YANG,X.;FAN,Y.Y.)