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Emulsions stabilisées par des particules colloïdales stimulables : propriétés fondamentales et matériaux

Abstract : Highly stable emulsions can be formulated using colloidal particles as stabilizers (so-called Pickering emulsions). This study aims at understanding the interfacial stabilization mechanisms as well as the links between the interfacial properties and the macroscopic properties of emulsions. In this context, our strategy consists in using colloidal particles for which characteristics can be continuously tuned either during the synthesis (variation of the particles' wettability or deformability) or in situ by using a stimulus (pH, salt, temperature...). Emulsions stabilized by such particles are stimuli responsive and their destabilization can be triggered on demand. We study and report the mechanisms of particle adsorption, the interactions between particles anchored at interfaces and the resulting properties of emulsions. Such study allows us to draw general concepts governing the emulsions stabilization/destabilization and to control their end-use properties via formulation or emulsification process (temperature, shear). Colloidal particle stabilized-emulsions can be used as templates to synthesize more complex materials as illustrated by the elaboration of capsules allowing a thermally controlled delivery of their content.
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Mathieu Destribats. Emulsions stabilisées par des particules colloïdales stimulables : propriétés fondamentales et matériaux. Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Sciences et Technologies - Bordeaux I, 2010. Français. ⟨tel-00593686⟩

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