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Journal of Materials Science

, Volume 29, Issue 13, pp 3565–3571 | Cite as

Solvent effect on ageing of silica gels

  • Kuotung Chou
  • B. I. Lee
Article

Abstract

The structure of silica gels derived from tetraethoxysilane (TEOS) with molar compositions of TEOS∶H2O∶HNO3=1∶10∶0.4 and then aged in various solvents, was studied. The effect of various solvents having different physical properties on the gel structure, as well as the relationship between the solvent properties and the dried gel structure, were investigated. The density, surface area and pore-size distribution were measured. The results of the pore structure and SEM showed the aged gels to have a slit-shaped micropore, narrow pore-size distribution, and homogeneous microstructure. The density, surface area, pore size and pore volume of dried gels changed as the gels were subjected to ageing in various solvents. The surface area could be related to the polarity parameter of the ageing solvent.

Keywords

Polymer Microstructure Pore Size HNO3 Pore Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Kuotung Chou
    • 1
  • B. I. Lee
    • 1
  1. 1.Department of Ceramic EngineeringClemson UniversityClemsonUSA

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