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Article Dans Une Revue European Physical Journal E: Soft matter and biological physics Année : 2012

Formulation and mechanical properties of emulsion-based model polymer foams.

Résumé

We produce cellular material based on the formulation of model emulsions whose drop size and composition may be continuously tuned. The obtained solid foams are characterized by narrow cell and pore size distributions in direct relation with the emulsion structure. The mechanical properties are examined, by varying independently the cell size and the foam density, and compared to theoretical predictions. Surprisingly, at constant density, Young's modulus depends on the cell size. We believe that this observation results from the heterogeneous nature of the solid material constituting the cell walls and propose a mean-field approach that allows describing the experimental data. We discuss the possible origin of the heterogeneity and suggest that the presence of an excess of surfactant close to the interface results in a softer polymer layer near the surface and a harder layer in the bulk.

Dates et versions

hal-00700496 , version 1 (23-05-2012)

Identifiants

Citer

G. Ceglia, Laurent Mahéo, Philippe Viot, Dominique Bernard, Ali Chirazi, et al.. Formulation and mechanical properties of emulsion-based model polymer foams.. European Physical Journal E: Soft matter and biological physics, 2012, 35 (4), 31 (11 p.). ⟨10.1140/epje/i2012-12031-0⟩. ⟨hal-00700496⟩
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