高分子微球模板法空心氧化锆微球的制备及其表征.pdf

摘要摘要空心微球纳米结构材料在催化、医药、绝热和光电领域呈现出很大应用前景, 引起了广泛的关注。本文采用高分子模板法合成氧化锆空心微球,主要研究内容和创新点如下:+ ,制各出了粒径分别为400nm、200nm和60rim左右的聚苯乙烯微球,讨论了其形成机理。 ,分别得到了修饰的聚苯乙烯微球。采用TEM、激光粒度分布仪、红外、核磁和热重分析对修饰聚苯乙烯微球进行表征,结果显示微球的修饰机理为化学共聚修饰。 ,分别制得不同粒径的氧化锆/高分子核壳和氧化锆空心微球。采用红外、紫外、、TEM和激光粒度分布仪,表征了核壳和空心微球的结构、形貌及粒度分布。由氧化锆,高分子核壳微球制各氧化锫空心微球过程中发现,溶解法得到的空心微球粒径比煅烧法得到的空心微球的粒径大,主要由于未煅烧的壳主要为无定型水合氧化锆,煅烧后的壳呈现出致密的四方晶相的氧化锫晶体结构。关键词:乳液聚合,微球,空心球,氧化锆 Abstract Hollow microsphere materials have attracted great attention in recent years because of theirextensive applications oncatalysis,medicine,thermal insulation and photoelectxon thedissertation,zkconia hollow microspheres were prepared by modified PSmicrosphere template main content and innovmion points arc asfoHows. microspheres and 60nm size were prepared by thesoap-free emulsionpolymerization method using styrene(St)as monomer and K2s208(gPS)as initiator,respectively and theirformationmechanism was discussed. PSmicrospheres weremodified byvinyltriethoxysilane(KHl51)to obtain modified PS microspheres,and theirstructure,morphology,particle size and distribution were characterized byFFIR,NMR,transmission electronmicroscopy ∞^D,laser light scattortechnique(LLS).The modification mechanism was investigated. zirconia hollow microspheres were prepared byusing m—PSM astemplate and theirstructure,morphology,size and distribution were characterized by FTIR, TEM,U3,TGA andUV-vis absorptionspectra, resultsshow that the hollow microspheres obtained by solution method islarger insizethan that yielded bycalcinationmethod shcu ofmicrospheres obtained by solutionmethod isconsisted ofamorphous zirconia hydrate while thatyielded by calcinationmethod pact tetragonalzirconia crystal structure. Key words:emulsionpolymerization,microspheres,hollow spheres,zirconia 独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研究成果。据我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他人已经发表或撰写过的