原子转移自由基聚合与“Click”反应相结合制备Fe_3O_4@SiO_2-g-PDMAEMA及其性质研究

Synthesis and Properties of Fe_3O_4@SiO_2-g-PDMAEMA Prepared via Combination of Atom Transfer Radical Polymerization and "Click" Reaction

结合原子转移自由基聚合(ATRP)与点击反应("Click"reaction),在SiO2包裹的Fe3O4磁性纳米粒子(Fe3O4@SiO2)表面接枝聚[甲基丙烯酸-2-(N,N-二甲氨基)乙酯](PDMAEMA),得到了表面接枝PDMAEMA的磁性纳米粒子(Fe3O4@SiO2-g-PDMAEMA).通过1H NMR和GPC测试,研究炔基封端的PDMAEMA的结构、分子量及分子量分布.通过透射电镜(TEM)、红外光谱(FT-IR)、热重分析(TGA)、动态光散射(DLS)和Zeta电位测试,研究了Fe3O4@SiO2和Fe3O4@SiO2-g-PDMAEMA的结构、形貌、粒径及表面性质.

Poly[2-（N,N-dimethylamino）ethyl methacrylate]（PDMAEMA） was prepared and grafted onto Fe3O4 magnetic nanoparticles encapsulated with SiO2（Fe3O4@SiO2） via combination of ATRP and ＂Click＂ reaction.So the magnetic nanoparticles grafted with PDMAEMA（Fe3O4@SiO2-g-PDMAEMA） on the sur-face were obtained.1H NMR and GPC tests were carried out to study the structure,molecular weight and polydispersity index（PDI） of alkynyl-capped PDMAEMA.TEM,FT-IR,TGA,DLS and Zeta potential tests were used to study the structures,morphologies,particle diameters and surface properties of Fe3O4@SiO2 and Fe3O4@SiO2-g-PDMAEMA,respectively.