Synthesis of a new polystyrene@Fe3O4 magnetic microspheres
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In this article, the synthesis process of magnetic polystyrene@Fe3O4 was investigated, which are suitable for the applicationin magnetically stabilized fluidized-bed reactors. The magnetic polystyrene@Fe3O4 coated with Fe3O4 were prepared bysuspension polymerization. In the reaction, triethoxy(vinyl)silane, styrene, divinylbenzene, liquid paraffin, gelatin, benzoylperoxides (BPO) were used as the surfactant, monomers, the crosslinking agent, a porogenic agent, a dispersant, an initiator,respectively. Simultaneously, the chemical composition, morphologies, particle sizes, the amount of Fe3O4 coated were analyzed. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy(FTIR), vibrating sample magnetometer (VSM) analysis and thermo gravimetric analysis (TGA). The results showed that thenew type of magnetic polystyrene@Fe3O4 microspheres were porous, spherical in shape with a narrow particle size distributionin the range of 150~200 μm. The amount of Fe3O4 coating reached to 12.39%, and the maximum saturation magnetizationwas 51.71 A·m2·kg-1 at room temperature. In addition, the results also showed that polystyrene@Fe3O4 magnetic microsphereshave good acid resistance and good suspendability.
Abstract
In this article, the synthesis process of magnetic polystyrene@Fe3O4 was investigated, which are suitable for the applicationin magnetically stabilized fluidized-bed reactors. The magnetic polystyrene@Fe3O4 coated with Fe3O4 were prepared bysuspension polymerization. In the reaction, triethoxy(vinyl)silane, styrene, divinylbenzene, liquid paraffin, gelatin, benzoylperoxides (BPO) were used as the surfactant, monomers, the crosslinking agent, a porogenic agent, a dispersant, an initiator,respectively. Simultaneously, the chemical composition, morphologies, particle sizes, the amount of Fe3O4 coated were analyzed. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy(FTIR), vibrating sample magnetometer (VSM) analysis and thermo gravimetric analysis (TGA). The results showed that thenew type of magnetic polystyrene@Fe3O4 microspheres were porous, spherical in shape with a narrow particle size distributionin the range of 150~200 μm. The amount of Fe3O4 coating reached to 12.39%, and the maximum saturation magnetizationwas 51.71 A·m2·kg-1 at room temperature. In addition, the results also showed that polystyrene@Fe3O4 magnetic microsphereshave good acid resistance and good suspendability.
참고문헌 (17)
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