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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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Cite this document: Acquaroli, L. N., Newby, P., Santato, C. & Peter, Y.-A. (2016). Thermal properties of methyltrimethoxysilane aerogel thin films. AIP Advances, 6(10). doi:10.1063/1.4965921
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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

Open Access document in PolyPublie
Subjects: 3100 Physique > 3100 Physique
3100 Physique > 3104 Physique des particules
Department: Département de génie physique
Research Center: Non applicable
Funders: CNSNG/NSERC
Date Deposited: 07 Dec 2020 11:54
Last Modified: 08 Apr 2021 10:43
PolyPublie URL: https://publications.polymtl.ca/4738/
Document issued by the official publisher
Journal Title: AIP Advances (vol. 6, no. 10)
Publisher: AIP Publishing
Official URL: https://doi.org/10.1063/1.4965921

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