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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2010> 19(3): 0367-370
YANG Kai, PANG Jia-wei, WU Bo-rong, CHEN Shi, WU Feng. SiO2 Aerogels Prepared with Ambient Pressure Drying and Its Properties[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2010, 19(3): 0367-370.
Citation: YANG Kai, PANG Jia-wei, WU Bo-rong, CHEN Shi, WU Feng. SiO2Aerogels Prepared with Ambient Pressure Drying and Its Properties[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2010, 19(3): 0367-370.
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SiO2Aerogels Prepared with Ambient Pressure Drying and Its Properties

  • Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China

  • Received Date:2009-04-27
    Abstract
  • SiO 2aerogels were produced from tetraethyl orthosilicate (TEOS) as silicon resources, ethanol as solvent and watery HCl or ammonia by sol-gel method and surface modification at ambient pressure. Scanning electronic microscopy,Fourier transform infrared spectrometer (FT-IR),pore size distribution measurement, packing density and some other experiment methods were used to characterize the morphology and pore structure and other properties of the silica aerogels. The results show that the silica aerogels have a typical nano-porous microstructure with hydrophobic property. It was discovered that SiO 2aerogels have better properties when the preparation condition is as following: the watery HCl concentration is 1%, the aging reagent is CH 3CHOHC 4H 9, the aging time is 20d, the volume concentration of trimethylchlorosilane (TMCS) in hexane is 6% and the surface modification time is 24h.
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    • References (10)
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