Journal of Sol-Gel Science and Technology

, Volume 50, Issue 3, pp 353–358 | Cite as

Effect of 3-glycidoxypropyltrimethoxysilane precursor on the properties of ambient pressure dried silica aerogels

  • P. Shajesh
  • S. Smitha
  • P. R. Aravind
  • K. G. K. WarrierEmail author
Original Paper


The effect of an organically modified precursor, 3-glycidoxypropyltrimethoxysilane in an ambient pressure process involving aging in silane solution for silica aerogels is presented. The effect of increasing trialkoxysilane/tetraalkoxysilane precursor ratio and the influence of water to Si molar ratio on the gelation and adsorption properties were investigated. An optimum water to Si molar ratio (8) gave the fastest gelation for all precursor ratios indicating a balance between the increase in rate of hydrolysis and a decrease in concentration of the monomers. Surface area analysis proved that in the dried gel, the organic groups are largely present on the pore walls and prevent the condensation of the silanol groups during drying. This in turn prevents pore collapse and further increases the total pore volume. The inclusion of the organically functionalised silane in the process further enhances the ambient pressure drying through this effect.


Aerogel Ambient pressure Sol–gel Glycidoxypropyltrimethoxysilane 



Authors P. S., S. S., and P. R. A thank CSIR for their fellowships.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • P. Shajesh
    • 1
  • S. Smitha
    • 1
  • P. R. Aravind
    • 1
  • K. G. K. Warrier
    • 1
    Email author
  1. 1.Materials & Minerals DivisionNational Institute for Interdisciplinary Science and TechnologyTrivandrumIndia

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