酸催化二氧化硅溶胶粒径和稳定性的研究

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1、西安工程大学学报JournalofXi’allPolytechnicUniversity第23卷第2期(总96期)2009年4月V01．23，No．2(Sum．No．96)ArticleID：1671-850X(2009)02-0556-06StudyoftheparticlesizeofsilicasolcatalyzedbyacidYANGJing(SchoolofEnvironmental＆ChemicalEngineering，Xi’蛐PolytechnicUniversity，Xi’蚰710048，China)Abstract：Si

2、licasolshavebeenpreparedbyacid．catalyzedhydrolysisandcondensationreactionsoftetra-ethylorthosilicate(TEOS)．．11lemRspectrumofsilicasol，theinfluencesofreactantproportionand删一fiontemperatureonthesilicasolsiYA蔓，andthestabilityofthesilicasolduring喀ngprocess黼invest／一gated．1heresu

3、ltsshowthatthecondensationreactionstakeplacebeforethecompletehydrolysisofTEOS．andTEOShydrolysisisincomplete．neHN03／TEOSmolarratiohaslessinfluenceonthesolsizewhileH20／TEOSmolarratiohasgreaterinfluence．AsthemolarmtiosofHN03／TEOSand心o／TEOS，andthereactiontemperatureincrease．the

4、preparedsolsizesincreasestepbystep．．11lesolsizesdecreasewiththeincreaseofEtOH／TEOSmolarratio．峨theagingprocess，thepartidesizeanddensityofsilicasolhaveunconspicuouschangeandthesolisrelativelystablebeforetheviscosityofsilicasolsharplyincrea-8es．Lowagil玛temperatureCanprolongthe

5、stabletimeofthesilicas01．Keywords：sol—gelmethod；silica；particlesize；stabili锣CLCnumber：0648．16Documentcode：A0IntroductionNanomaterialsandnanotechnologyhavebeenhotissuesintextilefieldduringtherecentdecades．Nano—par-tichsCanhelpenharicethephysicalpropertiesofconventionaltextil

6、esinareassuch船anti—microbialproperties．water—repellency，soil—resistance，anti—static，anti—infraredand血tl'neretardantproperties，dyeabilityandstrengthoftextilematerials11-21．Itisknownthatsilicacoatingscallbedepositedontextiles，thuschangingtheirproper-tiesandapplications。31．The

7、advantagesofsol-gelproce鼹areinthesimplepreparationofinorganicorhybridor-ganie／inorganiematerialsatroomtemperatureinthepresenceofwaterasahydrolyzingagentandthemierostruc—tareofthematerialCanbemodifiedbyvaryingthepmcessparameters㈩．Inrecentyears，tlletextilemodifica—tionwithsol

8、-geltechniquehasbeinvestigatedintensivelyforvariouspurposessuchasantimierobialcoat