报道了一种简单合成中空Fe3O4/SiO2磁性微胶囊的方法,即以反相乳液的水滴作为形成中空结构的软模板,通过界面溶胶-凝胶过程,制备中空Fe3O4/SiO2磁性微胶囊.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、选区电子衍射(SAED)、多晶粉末X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)及磁滞回线测量等手段对样品的结构和性质进行表征和研究.XRD、SAED和FTIR分析结果表明,微胶囊由SiO2和Fe3O4磁性纳米粒子(MPs)组成.SEM和TEM观察结果表明,微胶囊具有中空结构,且SiO2壳层具有多孔特性.磁性能检测结果表明,微胶囊具有超顺磁性和磁响应性.通过对比实验,提出SiO2界面异相成核的中空磁性微胶囊的形成机理.
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