【摘要】 采用分散聚合法制备了单分散脲醛树脂 Fe2O3 SiO2的复合微球,研究了不同的反应条件对于复合微球的分散状况和粒径大小的影响。该微球在马弗炉内灼烧后,脲醛树脂成分被除去,得到Fe2O3 SiO2的复合微球,其中的Fe2O3组分一部分转化为磁性γ-Fe2O3。由脲醛树脂 Fe2O3 SiO2复合微球的电镜(SEM)图、Fe2O3 SiO2复合微球的XRD衍射图得知该微球为多孔的磁性复合微球,且具有单分散性。更多还原

【Abstract】 Monodisperse microshperes consisting of urea-formaldehyde（UF） resins,Fe₂O₃ and SiO₂ were prepared by dispersion polymerization.Different influences on the dispersive extent and the magnitude of the microshperes in different conditions were investigated.The composite microspheres were then submitted for heat treatment to burn out the polymer template and render the remaining particles magnetizable.In this process α-Fe₂O₃ was partly transformed into γ-Fe₂O₃.SEM micrograph of the UF resins/Fe₂O₃/SiO₂ microspheres and XRD spectrum of the Fe₂O₃/SiO₂ microspheres showed that the Fe₂O₃/SiO₂ microspheres were porous,monodisperse and magnetizable.更多还原