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通过简单方法在磁性粒子表面包覆氧化硅后,采用嫁接法将有机功能基团成功引入到壳层表面,得到核壳结构纳米材料Fe3O4@SiO2-R。通过N2物理吸附、透射电镜(TEM)、振动样品磁强计(VSM)分别对材料结构和磁性进行表征。所制备的界面活性复合材料Fe3O4@SiO2-R在油水两相界面表现出较高的乳化效率,少量的Fe3O4@SiO2-CH3就能配制得到磁响应特性的W/O型Pickering乳液,进一步系统研究了硅烷偶联剂和嫁接条件对Pickering乳液液滴尺寸和稳定性的影响。
After coating the surface of the magnetic particles with silicon oxide by a simple method, the organic functional groups were successfully introduced into the surface of the shell by grafting to obtain Fe3O4 @ SiO2-R with the core-shell structure. The structure and magnetic properties of the materials were characterized by N2 physical adsorption, transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) respectively. The prepared interfacial active composite Fe3O4 @ SiO2-R exhibits high emulsifying efficiency at the interface of oil and water. A small amount of Fe3O4 @ SiO2-CH3 can be prepared as W / O Pickering emulsion with magnetic response. Further systematic studies Influence of silane coupling agent and grafting conditions on droplet size and stability of Pickering emulsion.