高分子物質(zhì)用于納米TiO-,2-制備及微結(jié)構(gòu)控制的研究.pdf

1、南京理工大學(xué)博士學(xué)位論文高分子物質(zhì)用于納米TiO制備及微結(jié)構(gòu)控制的研究姓名：劉孝恒申請學(xué)位級別：博士專業(yè)：材料學(xué)指導(dǎo)教師：汪信陸路德1999.12.1堡!堂篁堡塞壹坌王塑墮里主墊鲞!!旦!型魚絲垡莖塑堡型盟型塑一————生ABSTRACTInthispaperthepowdersofnanocrystallinetitaniawerepreparedbysol—gelmethod，andwithmanypolymerdispersant

2、sandinorganotitanatesThernicrosmacturescontrolofpreparedproductswasfocusedontheiraverageparticlesize，homogeneity，crystalsystem，crystallizedparticleshape，particlepolymerismandpurity，whichdependedondispersantstype，chemical

3、andmixingmodificationofdispersants，choosingbasicprecipitateforTi(OH)4preparationandthehearted—treatmentimprovementofsol—gelmethodElectrophomsis，viscositymeasurementthermalanalysis，x—mydiffraction，transmissionelectronmicr

4、oscopy，infraredspectrumthemeasurementofsurfacearBawereemployedtOcharacterizedispersantstructures，preparationprocedure，dispersionmechanismandthemicrostructuresofpreparedproducts(1)Rawgelatin，thegelatincrosslinkedwithformN

5、dehydeandthegelatinmixedwith130lyvinylalcoholwereusedasdispersantsrespectivelyforthepreparationofnanocrystaUinetitaniaResultsindicatedthattherawgelatinhadgooddispersionabilityandthemodifiedgelatinhadbetterdispersionabili

6、tyInparticular，thegelatintreated、vitIlformaldehydehadthebestdispersionabilityandthedispersionmechanismwassuggestedtobespatiallatticedmodel(2)BecausesolIleimpuritiescouldbeeasilycarriedintotitaniapowderswithinorganotitana

7、tesprecursor，atcentionWasputintopurificationanddopingofpreparationprocedurewithgelatinandpolyethyleneglyc01ItWaSfoundthatpuretitaniapowderscouldbeeasilyobtainedbyusingNitfH20precipitateHoweverpureorimpuretitaniapowdersco

8、uldbeobtainedbyusingNaOHprecipitate，whichdependedonTi(OH)4washingtreatmentThesometitaniapowdersfromNaOHpreparationprocedurehascatalyticactivityforbismaleirnidepolymerizationThechangeofthisactivityiscontrolledbytheNaconte

9、ntinthepowders(3)Starchandpolyethyleneglycolwereusedforthepreparationofnanocrystallinetitaniaandtraditionalaswellasimprovedsol—gelmethodswereadoptedFortheimprovedmethod也e缸admonalprocedureofcalcininggelwasreplacedbygelred

10、issolvingandtheultrafinecrystallizedtitaniapowder(一4nm)wasobtainedatlowtemperature(100。C)Thispowdercouldbeactedasaprimarymaterialofanotherprocedureofmicrostructurescontr01Inadditionthisnovelsol—gelmethodhasahelptoenviron