纳米银镓合金/聚甲基丙烯酸甲酯复合粒子的结构表征  

Characterization of the structure of Ag-Ga/PMMA nanoparticles

作　　者：章建忠[1] 徐国财[1] 王艳丽[1] 陈伟章[1] 

机构地区：[1]安徽理工大学化学工程系,淮南232001

出　　处：《复合材料学报》2007年第4期67-70,共4页Acta Materiae Compositae Sinica

基　　金：教育部科技基金重点项目(206064);安徽省自然科学基金项目(050440907);安徽省高校科研基金项目(2004kj015zd)

摘　　要：在不加任何引发剂和金属还原剂的条件下,超声辐射双原位引发乳液聚合制备纳米银镓合金/聚甲基丙烯酸甲酯（Ag-Ga/PMMA）复合粒子。利用HREM、EDS、XRD等对复合粒子进行了分析,表明所制得的乳胶粒子具有典型的核壳结构,粒径为80-200 nm,分布均匀,单分散性好,基本没有出现团聚。乳胶粒子中成壳部分的聚合物产生了一层层有序组装的现象。XRD证明,有纳米合金Ag0.72Ga0.28存在;此外还出现了2个新的衍射峰,推断可能是新的银镓合金物质。The core-shell Ag-Ga/polymethyl methacrylate nanoparticles were prepared by the emulsion polymerization method under ultrasonic irradiation in-situ without any initiators or metal reducer. HREM, EDS and XRD experiments were performed to characterize the nanoparticles. The results indicate that the nanocomposite particles possess a core-shell structure with diameters of 80-200 nm, as well as excellent monodispersity. The phenomenon that the polymer forms the shell via layer-by-layer self-assembly is found. XRD proves the existence of Ag0. 72 Ga0. 28 and the probability of new Ag-Ga alloy because of two unknown diffraction peaks.

关 键 词：超声辐射 银镓合金 聚甲基丙烯酸甲酯 核壳结构 

分 类 号：TB333[一般工业技术—材料科学与工程]