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Thermal properties of methyltrimethoxysilane aerogel thin films

Leandro N. Acquaroli, Pascal Newby, Clara Santato and Yves-Alain Peter

Article (2016)

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Abstract

Aerogels are light and porous solids whose properties, largely determined by their nanostructure, are useful in a wide range of applications, e.g., thermal insulation. In this work, as-deposited and thermally treated air-filled silica aerogel thin films synthesized using the sol-gel method were studied for their thermal properties using the 3-omega technique, at ambient conditions. The thermal conductivity and diffusivity were found to increase as the porosity of the aerogel decreased. Thermally treated films show a clear reduction in thermal conductivity compared with that of as-deposited films, likely due to an increase of porosity. The smallest thermal conductivity and diffusivity found for our aerogels were 0.019 W m(-1) K-1 and 9.8 x 10(-9) m(2) s(-1). Amodel was used to identify the components (solid, gaseous and radiative) of the total thermal conductivity of the aerogel. (C) 2016 Author(s).

Uncontrolled Keywords

silica aerogels; ambient-pressure; conductivity; reduction

Subjects: 3100 Physics > 3100 Physics
3100 Physics > 3104 Particle physics
Department: Department of Engineering Physics
Funders: CNSNG/NSERC
PolyPublie URL: https://publications.polymtl.ca/4738/
Journal Title: AIP Advances (vol. 6, no. 10)
Publisher: AIP Publishing
DOI: 10.1063/1.4965921
Official URL: https://doi.org/10.1063/1.4965921
Date Deposited: 07 Dec 2020 11:54
Last Modified: 09 Apr 2024 01:12
Cite in APA 7: Acquaroli, L. N., Newby, P., Santato, C., & Peter, Y.-A. (2016). Thermal properties of methyltrimethoxysilane aerogel thin films. AIP Advances, 6(10). https://doi.org/10.1063/1.4965921

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