2012•Cailiao gongchengOpen access

Preparation of Silica Aerogel via Ambient Pressure Drying

Xingwang Li

Abstract

Hydrophobic silica aerogel was prepared from commercial water glass via ambient pressure drying.The effects of aging times,aging agents,drying solvent categories and surface modification on the microstructure and properties of silica aerogel were investigated.The results showed that the density,porosity and specific surface area of the prepared silica aerogel were 0.082g/cm3,96.26% and 585.4m2/g,respectively.The structure and properties of hydrophobic silica aerogel were analyzed by scanning electron microscope(SEM),Fourier transform infrared spectra(FT-IR),thermogravimetric(TG) and differential thermal analysis(DTA).

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Available abstract

Key concepts: Aerogel, Thermogravimetric analysis, Materials science, Ambient pressure, Scanning electron microscope, Microstructure, Porosity, Fourier transform infrared spectroscopy