杂化介孔二氧化硅溶胶的制备及表征

Preparation and Characterization of Hybrid Mesoporous Silica Sol

在室温、不同pH值条件下合成出纳米球形介孔二氧化硅溶胶。通过研究得出当pH=4时为最佳生产工艺,在pH=4条件下以十六烷基三甲基溴化铵为模板剂,利用正硅酸乙酯和硅烷偶联剂共水解制备了杂化介孔二氧化硅溶胶。运用激光纳米粒度仪、透射电镜、X射线衍射等测试方法对材料进行表征。结果表明:通过共水解溶胶-凝胶法成功合成了改性介孔二氧化硅溶胶,其粒径约为25 nm,具有规则的介孔结构和良好的分散性。

Nano spheric mesoporous silica sol is synthesized under the conditions of room temperature and differentph values. It is found that the best production technology is pH=4. With CTAB as a template, the hybrid mesoporous silica sol is prepared by cohydrolysising of TEOS and GPTMS at pH=4. The synthesized materials are characterized by XRD, TEM and Zetasizer Nano. The result indicates that the prepared mesoporous silica sol has good mesostructure and good dispersion with particle size about 25 nm.