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通过静电吸附与机械力共同作用的沉积法制备得到了Fe3O4/P(AA-DVB)磁性复合微球。分别采用无皂乳液聚合和共沉淀法制备得到单分散的P(AA-DVB)胶体粒子及Fe3O4纳米粒子,在静电吸附和机械力作用下,将Fe3O4纳米粒子附着并嵌入P(AA-DVB)胶体粒子表面及内部,制备得到Fe3O4/P(AA-DVB)磁性复合微球。该方法的优势在于最终磁性复合微球的粒径及粒径分布可以由前驱体P(AA-DVB)胶体粒子调控。磁性复合微球表面和内部Fe3O4纳米粒子的分布及磁含量可以由机械力作用时间进行调节。所制备的Fe3O4/P(AA-DVB)磁性复合微球平均粒径为542 nm,磁含量范围在11%~33%内可调。
Fe3O4 / P (AA-DVB) magnetic composite microspheres were prepared by electrostatic adsorption and mechanical force deposition. The monodispersed P (AA-DVB) colloidal particles and Fe3O4 nanoparticles were prepared by soap-free emulsion polymerization and coprecipitation method respectively. The Fe3O4 nanoparticles were attached and embedded into P (AA-DVB) Fe3O4 / P (AA-DVB) magnetic composite microspheres were prepared on the surface and inside of colloidal particles. The advantage of this method is that the particle size and particle size distribution of the final magnetic composite microspheres can be controlled by the precursor P (AA-DVB) colloidal particles. The distribution and magnetic content of Fe3O4 nanoparticles on the surface and inside of the magnetic composite microspheres can be regulated by the mechanical action time. The prepared Fe3O4 / P (AA-DVB) magnetic composite microspheres had an average particle size of 542 nm and a magnetic content range of 11% -33%.