Paper Title:
Study on Preparation of Mesoporous Silica Aerogels with Low Density and High Properties via Ambient Pressure Drying
  Abstract

The SiO2 aerogels of low density was fabricated by ion exchange and sol-gel method on the basis of sodium silicate. The effect of pH, aging,addition of DCCA and annealed temperature on the gel time, aerogel density, porosity and the micro-structure was systemly studied. The results showed that when the pH is 5, aging was 30%Vol .of TEOS/ethanol solution ,the addition of DCCA was 1.5ml, the gel system was annealed at 50 for 84 h, 60 for 72h, the best quality of silica aerogels with low density (0.14g/cm3), higher specific surface(610.643 m2/g) and pore size of 20~40 nm can be obtained.

  Info
Periodical
Advanced Materials Research (Volumes 148-149)
Edited by
Xianghua Liu, Zhengyi Jiang and Jingtao Han
Pages
1491-1496
DOI
10.4028/www.scientific.net/AMR.148-149.1491
Citation
G. Q. Geng, W. T. Bi, Y. Zhang, D. K. Sun, "Study on Preparation of Mesoporous Silica Aerogels with Low Density and High Properties via Ambient Pressure Drying", Advanced Materials Research, Vols. 148-149, pp. 1491-1496, 2011
Online since
October 2010
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$32.00
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