陶瓷先驱体Polyvinylsilazane-b-Polystyrene的合成及纳米陶瓷颗粒的制备  

Synthesis of Polyvinylsilazane-b-Polystyrene Ceramic Precursor and Preparation of Ceramic Nanoparticles

作　　者：邰金华[1] 余煜玺[2,3] 赖德林[2] 许春来[4] 

机构地区：[1]华北水利水电学院机械学院,郑州450011 [2]厦门大学材料学院材料科学与工程系,厦门361005 [3]福建省防火阻燃材料重点实验室,厦门361005 [4]北京航天材料及工艺研究所,北京100076

出　　处：《人工晶体学报》2011年第5期1266-1270,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.51175444);中央高校(厦门大学)基本科研业务费专项资金(2011121002);福建省重大平台建设基金(2009J1009)

摘　　要：以DTBA为链转移剂,VSZ和苯乙烯为单体,通过可逆加成断裂链转移(RAFT)聚合合成了嵌段共聚物陶瓷先驱体Polyvinylsilazane-b-Polystyrene(PVSZ-b-PS)。利用DLS、TEM、AFM等技术,考察了PVSZ-b-PS在选择性溶剂DMF中自组装成胶束的行为。结果表明,胶束为核-壳结构的球形,其中PVSZ为核、PS为壳,胶束直径70～110nm。PVSZ-b-PS胶束制成的聚合物膜能完整保留胶束的球形特征,800℃热解能制得直径为30～40 nm的纳米陶瓷颗粒。XRD结果表明陶瓷颗粒是SiC结晶相。The ceramic precursor,diblock copolymer polyvinylsilazane-block-polystyrene（PVSZ-b-PS）,was synthesized by reversible addition fragmentation chain transfer（RAFT） free radical polymerization methods using vinylsilazane and styrene as monomer.The diblock copolymer was found to organize into spherical micelles in N,N-dimethylformamide.The micelle core consists of PVSZ and the shell consists of polystyrene,the diameters of the micelles evaluated by DLS and TEM ranged from 70 nm to 110 nm.Upon evaporation of the solvent,these micelles self-assemble into polymer film,which was pyrolyzed at 800 ℃ to obtain ceramic nanoparticles.The diameters of the ceramic particles estimated by AFM and SEM ranged from 30 nm to 40 nm.XRD analysis of the ceramic particles revealed that it was SiC grain.

关 键 词：嵌段共聚物 纳米颗粒 热解 

分 类 号：TQ174[化学工程—陶瓷工业]