疏水性Fe_3O_4纳米粒子与双亲性嵌段共聚物(PVP-b-PMMA)的自组装  

Self-assembly of hydrophobic Fe_3O_4 nanoparticles with amphiphilic block copolymer PVP-b-PMMA

作　　者：宋晓艳[1] 杨飞[1] 程国清[1] 邢金峰[2] 

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津大学化工学院,天津300072

出　　处：《天津工业大学学报》2016年第4期54-58,共5页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(51103103);国家高科技研究发展计划项目(2007AA03Z359)

摘　　要：以乙酰丙酮铁为铁源,用热分解法制备疏水性四氧化三铁(Fe_3O_4)纳米粒子,将N-乙烯基吡咯烷酮与甲基丙烯酸甲酯嵌段共聚物(PVP-b-PMMA)与疏水性的Fe_3O_4纳米粒子进行自组装,并采用透射电镜(TEM)、红外光谱(FT-IR)、热重(TGA)分析和动态光散射(DLS)等方法对产物结构进行表征.结果表明:所合成的Fe_3O_4纳米粒子表面物理吸附和化学键合了一层油胺分子,在二甲基甲酰胺(DMF)溶液中具有很好的分散性,且平均粒径为8.2 nm;在自组装过程中疏水性的Fe_3O_4纳米粒子能够很好地进入到胶束的内部,并均匀分散在胶束的内腔中.The hydrophobic ferriferrous oxide（Fe3O4） nanoparticles was prepared by thermal decomposition method and iron （Ⅲ） acetylacetonate as the iron source. The hydrophobic Fe3O4 nanoparticles was self-assemblied with block copolymer（PVP-b-PMMA） synthesised by N-vinyl pyrrolidone and methyl methacrylate. The transmission elec-tron microscope （TEM）, Fourier transform infrared spectrom （FT-IR）, thermogravimetric analysis （TGA） and dynamic light scattering（DLS） Ⅲtechnologies were used to characterize the structure of the micelle self-assembled by Fe3O4 nanoparticles and PMMA-b-PVP copolymer. Experimental results showed that surface of Fe3O4 nanoparticles was covered by a layer of oleylamine molecule which was physical adsorbed and chemical bonded with it, and just the oleyl-molecule layer enable Fe3O4 nanoparticles can be dispersed well in dimethylformamide （DMF） solvent and the average diameter of Fe3O4 nanoparticles is 8.2 nm. In the process of self-assemble, the hydrophobic Fe3O4 nanoparticles were well encapsulated into the interior of the micelle and evenly dispersed uni-formly in the core of micelle.

关 键 词：疏水性 FE3O4纳米粒子 乙酰丙酮铁 热分解 双亲性嵌段共聚物 自组装 

分 类 号：TQ460[化学工程—制药化工]