以聚苯乙烯微球为模板制备中空介孔二氧化硅微球-化学工程与技术专业论文.docx

以聚苯乙烯微球为模板制备中空介孔二氧化硅微球-化学工程与技术专业论文.docx

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以聚苯乙烯微球为模板制备中空介孔二氧化硅微球-化学工程与技术专业论文

AbstractMultistorystructuredmesoporoussilica,especially hollow spherical particleswithmesoporousshells(HMS), areof special interest,because they combine thecharacteristicsofbothmacroporousandmesoporousstructuresinonesingleunit.Thehollowcavityinthesehighlyengineeredparticlescanactasstoragereservoiroramicro-reactor,whereasthemesoporousshellprovidescontrolledreleasepathwaysforencapsulatedsubstancesorsubstantialsurfaceareaforreactions.Asaresult,HMShasattractedintenseinterestinawidevarietyofapplications,suchascatalysis, separation,sensorsanddrugdelivery.Inthispaper,weselectedpolystyrene(PS)nanoparticlesastemplates,hexadecyltrimethylammoniumbromide(CTAB)assurfactantandthe porogen,usingtetraethoxysiliane(TEOS)assourceofsilica,throughsol-gelandelectrostaticeffectmechanismtopreparehollowmesoporoussilicamicrospheres.Atthesametime,wepreparepolystyrenemicrospheresbytheemulsionpolymerization.Throughthescanningelectronmicroscope(SEM)andtransmissionelectronmicroscope(TEM),X-raydiffraction,FourierTransformInfraredSpectroscopy(FTIR)and Thermogravimetric Analysis (TGA), we studied theparticlesize,morphology,structureofPSandHMS,andanalysisthetheformationmechanismofthehollowmesoporoussilicamicrospheres.Inthepreparationofpolystyrenetemplate,wehavestudiedtheinfluenceofstyrenemonomer,surfactantsandthestirringrateonPSparticlesize.Inthepreparationofhollowmesoporoussilica,wehavestudiedtheinfluenceoftemplate,surfactantsandtheaqueousammoniaonHMSshellthicknessandmorphology.Keywords: polystyrene, hollow mesoporous microsphere, surfactant, formationmechanism目录摘要............................................................................................................................... IAbstract............................................................................................................................II第1章绪论................................................................................................................ 11.1 课题背景及研究的目的和意义....................

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