Fabrication, stabilité et propriétés rhéologiques des émulsions stabilisées par des particules colloïdales

Abstract : Emulsions stabilized by solid particles exhibit original properties due to the rigidity of the interfaces. The first part of the manuscript describes the fabrication of monodisperse emulsions with diameter ranging from micrometer to millimeter following a homogeneous growth process driven by coalescence (limited coalescence). Model emulsions are concentrated by centrifugation and we measure the relation between the osmotic pressure and droplet volume fraction. The results are interpreted considering the solid-like behavior (elasticity, plasticity) related to the intrinsic attractive interactions that exist between adsorbed particles. Surface properties are independently explored by measuring the critical stress for rupturing of isolated droplets. Finally, we compare the rheological properties of solidstabilized (“solid” interfaces) and surfactant-stabilized emulsions (“fluid” interfaces).
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Stéphane Arditty. Fabrication, stabilité et propriétés rhéologiques des émulsions stabilisées par des particules colloïdales. Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Sciences et Technologies - Bordeaux I, 2004. Français. ⟨tel-00135898⟩

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