微乳液法制备SiO_2超疏水性气凝胶粉体

Preparation of super-phobic SiO_2 aerogel powder by using the microemulsion method

以水玻璃为硅源,煤油为分散介质,采用微乳液法和常压干燥工艺制备出了高比表面积、颗粒均匀的Si O2超疏水性纳米粉体气凝胶,研究了微乳液形成所需表面活性剂的剂量范围、干燥时间及气凝胶粉体密度变化规律,并对制得气凝胶粉体的粒径分布、比表面积、微观形貌及疏水性进行了分析测试。结果表明,微乳液法制备所得气凝胶粉体粒径分布均匀,效率高,并具有良好的超疏水性能。

Si O2 nanopowder aerogel was prepared using silicon source of water glass and dispersion of medium kerosene by microemulsion method in ambient pressure dying process to prepare. The aerogel has good properties of high specific surface area,uniform particles,and super-hydrophobic. Surfactant weight,dying time,and the density of the aerogel power were investigated. Also this study researched the particle size,specific surface area,morphology and hydrophobicity. Results show that the aerogel powder prepared by microemulsion method has the superiorities of uniform particle size,high efficiency and super-hydrophobic.