Effect of Water on Elastic and Creep Properties of Self-Standing Clay Films - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Langmuir Année : 2016

Effect of Water on Elastic and Creep Properties of Self-Standing Clay Films

Résumé

We characterized experimentally the elastic and creep properties of thin self-standing clay films, and how their mechanical properties evolved with relative humidity and water content. The films were made of clay montmorillonite SWy-2, obtained by evaporation of a clay suspension. Three types of films were manufactured, which differed by their interlayer cation: sodium, calcium, or a mixture of sodium with calcium. The orientational order of the films was characterized by X-ray diffractometry. The films were mechanically solicited in tension, the resulting strains being measured by digital image correlation. We measured the Young’s modulus and the creep over a variety of relative humidities, on a full cycle of adsorption–desorption for what concerns the Young’s modulus. Increasing relative humidity made the films less stiff and made them creep more. Both the elastic and creep properties depended significantly on the interlayer cation. For the Young’s modulus, this dependence must originate from a scale greater than the scale of the clay layer. Also, hysteresis disappeared when plotting the Young’s modulus versus water content instead of relative humidity. Independent of interlayer cation and of relative humidity greater than 60%, after a transient period, the creep of the films was always a logarithmic function of time. The experimental data gathered on these mesoscale systems can be of value for modelers who aim at predicting the mechanical behavior of clay-based materials (e.g., shales) at the engineering macroscopic scale from the one at the atomistic scale, for them to validate the first steps of their upscaling scheme. They provide also valuable reference data for bioinspired clay-based hybrid materials.
Fichier principal
Vignette du fichier
Carrier-et-al-2016.pdf (3.97 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01975527 , version 1 (10-05-2019)

Identifiants

Citer

Benoît Carrier, Matthieu Vandamme, Roland J.-M. Pellenq, Michel Bornert, Eric Ferrage, et al.. Effect of Water on Elastic and Creep Properties of Self-Standing Clay Films. Langmuir, 2016, 32 (5), pp.1370-1379. ⟨10.1021/acs.langmuir.5b03431⟩. ⟨hal-01975527⟩
195 Consultations
116 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More