%0 Journal Article
%T Poroelastic Theory Applied to the Adsorption-Induced Deformation of Vitreous Silica
%+ Multiscale Material Science for Energy and Environment (MSE 2)
%+ MIT Department of Civil and Environmental Engineering (CEE)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM)
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC)
%A Coasne, Benoit
%A Weigel, Coralie
%A Polian, Alain
%A Kint, Mathieu
%A Rouquette, Jérome
%A Haines, Julien
%A Foret, Marie
%A Vacher, René
%A Rufflé, Benoit
%< avec comité de lecture
%@ 1520-6106
%J Journal of Physical Chemistry B
%I American Chemical Society
%V 118
%P 14519 - 14525
%8 2014
%D 2014
%R 10.1021/jp5094383
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X When vitreous silica is submitted to high pressures under helium atmosphere, the change in volume observed is much smaller than expected from its elastic properties. 1 It results from helium penetration into the interstitial free volume of the glass network. We present here the results of concurrent spectroscopic experiments using either helium or neon and molecular simulations relating the amount of gas adsorbed to the strain of the network. We show that a generalized poromechanical approach, describing the elastic properties of microporous materials upon adsorption, can be applied success-fully to silica glass in which the free volume exists only at the sub-nanometer scale. In that picture, the adsorption-induced deformation accounts for the small apparent compressibility of silica observed in experiments.
%G English
%2 https://hal.science/hal-01101026/document
%2 https://hal.science/hal-01101026/file/Coasne_JPhysChemB_2014_Rev.pdf
%L hal-01101026
%U https://hal.science/hal-01101026
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