二氧化硅溶胶反应物的配比对性能的影响研究

JournalofXianUniversityofEngineeringScienceandTechnology211(83)20072Vol.21,No.1(SumNo.83):16712850X(2007)0120126203:2006209208:(05JK208))(04XG12):(19762),,,,.E2mail:[e-mail]1,2,1,1(1.,710048;1.,710049):,,SiO2.,.,pH2,pH,,,SiO2;,,,()RW=7.08.0,,SiO2;,,,.:;;;:TQ127.2:A0,.,,.,,,,.,,,SiO2,.11.11.1.19422,;GKL2112CR2,;DGH2P023A,2;AL204,2;DELTA320pH,2();,;WZS2840541,;Nanozs,.1.1.2(AR),;(AR),;(AR),;N,N2(AR),;,.1.2(TEOS)(EtOH),(H2O)(HNO3),703h,30%(V/V)N,N2,15minSiO2.SiO2.22.1,TEOS,,[1]:(C2H5O)3SiOC2H5+H2O(C2H5O)3SiOH+C2H5OH;:(C2H5O)3SiOH+HOSi(OC2H5)3(C2H5O)3SiOSi(OC2H5)3+H2O;:(C2H5O)3SiOC2H5+HOSi(OC2H5)3(C2H5O)3SiOSi(OC2H5)3+C2H5OH.TEOSH+Si,H+TEOS.pH.HNO3/TEOS(RH).TEOSH2OEtOH=16.43.8[223],HNO3pH.2.1.1/pH1.1,,pH.pH(30)2.2,,,.pH=2.00,TEOSpH7pH,pH7pH;SiO2pH2pH,pH2pH[425].,pH2,,pH,TEOSSiO2,,.1pH2/2.1.23.3,pH2,SiO2.pH2,,[H+],TEOSSiO2,,.,.2.2TEOS-,,,.H2O/TEOS(RW).,TEOSHNO3EtOH=10.0853.8[223],.2.2.1//72114.34/4,,,.Rw,,,,TEOS,TEOS,TEOS,,OC2H5,OH,,[2].TEOS,,,,,.RW,,,TEOS,,,,TEOSSiOH,,,,,,[6],,.,RW=4.0TEOS,RW4,,,RW=4,RW=7.08.0,.2.2.25.5,,.TEOS,,TEOS.RW4,,,OH[627].,;,RW4,,,.,RW,,.2.3TEOS,,,,./(REtOH).,TEOSHNO3H2O=10.0856.4[223],.2.3.1/SiO26.6,,,.[829],.,TEOS,,,8212156/TEOS,TEOS,SiOH,,,,,.,.72.3.27.7,,.,,,,,.,,,,,,,.3(1),pH2,pH,,,SiO2;(2),,,RW=7.08.0,SiO2;(3),,,.:[1],,,.[M].:,1999.[2]RENATEMdeVos,WILHELMFMaier,HENKVerweij.Hydrophobicsilicamembranesforgasseparation[J].JournalofMembraneScience,1999,158:2772288.[3],,,.[J].,2004,19(1):1332139.[4].SiO2[D].:,2002.[5],,.[M].:,1998.[6].[D].:,2003.[7].[D].:,2005.[8],,.SiO2[J].,2006,26(1):30233.9211[9],,.[J].,1999,13(4):124.EffectofreactionmattersproportioningofsilicasolonitspropertiesYANGJing1,CHENJie2rong2,ZHANGJian2min1,LIUYu1(1.SchoolofEnvironmental&ChemicalEngineering,XianPolytechnicUniversity,Xian710048China;2.DepartmentofEnvironmentScience&Engineering,XianJiaotongUniversity,Xian710049,China)Abstract:SilicasolwaspreparedusingTEOSastheprecursorandHNO3asthecatalyst.Theeffectsoftheamountofcatalyst,waterandethanolonthepropertiesofsilicasolwereinvestigated.Theproper2tiesofsilicasolwerecharacterizedbyviscosity,gelationtimeandparticlesizes.TheresultsshowthatwhenpHislessthan2,theviscosityofsilicasoldecreases,gelationtimeincreasesandtheparticlesizedecreaseswiththepHincreased.AsthemolratioofwatertoTEOSRWincreases,theviscosityofsilicasolfirstlyincreasesandthendecreases,andgelationtimefirstlydecreasesandthenincreases.WhenRWis7.08.0,theviscosityofsilicasolreachesitsmaximum,andthegelationtimeachievesitsminimum,andtheparticlesizeofsolincreaseswiththewateramountincreased.Astheethanolamountincreases,theviscosityofsilicasoldecreases,geltimeincreasesandtheparticlesizedecreases.Keywords:sol2gelmethod;silica;viscosity;geltime;particlesize:4000,.70%,,4.,,.,.,,.(:),.,,4000.,.,().,,,.20.00,9036.:::17,:300385:022223973378;23962479:022223973378E2mail:[e-mail]: