电场强化组装聚离子复合物膜研究

:1007-8924(2008)04-0097-04电场强化组装聚离子复合物膜研究­高学1,张国俊1*,纪树兰1,刘忠洲2,田亮1(1.,100022;2.,100085):采用水解改性PAN超滤膜作为基膜,通过动态电场强化技术复合聚乙烯亚胺(PEI)制备聚电解质渗透汽化复合膜,考察了不同电压对聚离子复合膜的渗透汽化性能的影响.实验测定了复合膜对不同醇/水体系的分离性能,发现在仅复合一层PEI时,电场强化LBL组装膜(5V电压作用)对质量分数为95%的异丁醇/水体系的分离因子可达485,渗透通量为1521g/(m2#h)(60e).:电场强化组装;聚丙烯腈超滤膜;渗透汽化;聚离子复合膜:TQ028.8:A.,.-,,.,50~60[1],,(,).,.LBL[2,3],.,[4,5].,,,.1实验部分1.1(PAN-50),SEPRO;(PEI),60000,ALDRICH;,,.1.285-2,;DZF-6020,;HF-6100D,;AR-2140,;GC-14,;,;LBL,;,LW;BT-3,.1.31.3.1PANPAN2mol/LNaOH,30min,,pH.1.3.2LBL1.PAN,,­:(2006B13);(8071001);()05005999200601):(1982-),,,,.*[e-mail]4284Vol.28No.420088MEMBRANESCIENCEANDTECHNOLOGYAug.200835%PEI0.10MPa,,,PEI,.30min,.1Fig.1Experimentalapparatusforpreparationofpolyioncomplexmembranesusingdynamicalelectricfieldenhancedtechnique1.4/,2.,:A(1)J(2):A=YA/YBXA/XB(1)J=W/(S#t)(2),YAYB;XAXB;W;S;t.1.;2.;3.;4.;5.;6.;7.;8.;9.2Fig.2Experimentalapparatusforpervaporationevaluation2结果与讨论2.1PAN:PAN,)CN)OH)COO-[1].PEI,(3),.,PAN,,,,.,PEI.2.2LBLLBL,1.1,LBL50~60,,.LBLPEI/PAA,2.5.0.5(PEI),,,PEI,.2.30.10MPa,PANLBL,0.35%PEI,60e2.2,,5V,,#98#28表1不同方法所制复合膜的渗透汽化性能Table1Pervaporationperformancesofcompositemembranespreparedbydifferentmethods()/e/(g#m-2#h-1)LBL0.5PANPEI95%/6060429[2]LBL2.5PANPEI/PAA95%/70604304[2]LBL0.5PANPEI95%/605.343954LBL0.5PANPEI95%/6082.171086LBL4PESPAA/PEI95%/401320140[3]LBL60PANPVA/PVS93.8%/58.570599[1]LBL20PEI/Alginate88%/5010000300[6]LBL10.5BPDA-DABA/PAH90%/50781500[7]LBL8PANPEI/PAA89%/60217810[8]表2电场强度对膜渗透汽化性能的影响Table2Effectofdifferentvoltageonmembranepervaporationperformance/VA/(g#m-2#h-1)05395458210861069117115601224LBL,.10V15V,.2.43.表3料液温度对膜渗透汽化性能的影响*Table3Effectoffeedtemperatureonmembranepervaporationperformance/ew/%w/%/(g#m-2#h-1)A409559.9296428609581.22108682759588.791243150*:5V;,60e.3,,,.,,,.2.5/PAN/PEI///,4.表4复合膜渗透汽化分离不同醇/水体系结果*Table4Pervaporationperformanceofcomplexmembraneunderdifferentethanol/watermixturew/%w/%A/(g#m-2#h-1)/9581.22821086/9585.331111107/9596.234851521*:5V;,60e.4,/,60e,95%/,PEI,96.23%(485),1521g/(m2#h).,,,,,/.3结论,:1)LBL,,,.2)5V,,95%/,60e,485,1521g/(m2#h).4:#99#[1]ToutianoushA,TiekeB.Pervaporationseparationofalco-hol/watermixturesusingself-assembledpolyelectrolytemultilayermembranesofhighchargedensity[J].MaterSciandEngC,2002,22:459-463.[2]ZhangGuojun,YanHaihong,JiShulan,etal.Self-as-semblyofpolyelectrolytemultilayerpervaporationmem-branesbyadynamiclayer-by-layertechniqueonahy-drolyzedpolyacrylonitrileultrafiltrationmembrane[J].JMembrSci,2007,292:1-8.[3]ZhangGuojun,GuWeiliang,JiShulan,etal.PreparationofpolyelectrolytemultilayermembranesbyDynamiclayer-by-layerProcessforpervaporationseparationofalcohol/Watermixtures[J].JMembrSci,2006,280:727-733.[4]ZhangGuojun,GaoXue,JiShulan,etal.Electricfieldenhancedassemblyofpolyelectrolytecompositemembranes[J].JMembrSci,2008,307:151-155.[5],,,.[P].:200710119717.8.2007-07-31.[6]Meier-HaackJ,LenkW,LehmannD,etal.Pervapora-tionseparationofwater/alcoholmixturesusingcompositemembranesbasedonpolyelectrolytemultilayerassemblies[J].JMembrSci,2001,184:233-243.[7]SullivanDM,BrueningML.Ultrathin,cross-linkedpolyimidepervaporationmembranespreparedfrompolyelec-trolytemultilayers[J].JMembrSci,2005,248:161-170.[8]ZhuZhaoqi,FengXianshe.AlexanderPenlidis.Self-as-semblednano-structuredpolyelectrolytecompositemem-branesforpervaporation[J].MaterSciandEngC,2006,26:1-8.StudyonpolyioncompositemembraneassembledbyelectricfieldenhancedtechniqueGAOXue1,ZHANGGuojun1,JIShulan1,LIUZhongzhou2,TIANLiang1(1.CollegeofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China;2.ResearchCenterforEco-EnvironmentalScience,ChineseAcademyofSciences,Beijing100085,China)Abstract:Inthispaper,thepolyioncompositemembraneswereassembledbyabsorbingaPEIlayeronhy-drolyzedPANultrafiltrationsupportmembranesunderelectricfield.Theeffectsofappliedvoltagesonpervapo-rationperformanceofcompositemembraneswereinvestigated.Thecompositemembraneswereusedtoseparatedifferentalcohol/watermixtures.Inthecaseofpervaporationof95%iso-butyl/watermixtures,underthefeedtemperatureof60e,theseparationfactorandthepermeatefluxofpolyioncompositemembranes(assem-bledundertheelectricfieldof5V)were485and1521g/(m2#h),respectively.Keywords:electricfield;PANultrafiltrationmembrane;pervaporation;polyioncompositemembrane//.29.(),.,720,30.,5.12,/30,.(/)#100#28