| 초록 |
In order to make magnetic particles which are stable for dispersion in medium, the synthesis of PS/magnetite composite particles has been studied. The encapsulation of magnetite nanoparticles has been achieved by suspension polymerization of styrene in aqueous medium, following the synthesis of magnetite nanoparticles by a modified chemical coprecipitation method. The encapsulated magnetite particle was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and vibrating-sample magnetometry (VSM). Rheological properties of monodispersed magnetorheological suspensions of the magnetic microspheres dispersed in silicone oil were examined under a magnetic field using a parallel plate typed rheometer. The synthesized microspheres were different from the pure Fe3O4 particles, such as size and magnetization, rheological properties as well. |
