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Développement de nouvelles méthodes pour l'élaboration d'émulsions multiples eau/huile/eau

Abstract : This work deals with the development of new routes for the preparation of w/0/W multiple emulsions. Two strategies were developed on the basis of a Generalized Formulation Concept, thanks to an in situ follow-up method allowing the simultaneous measurement of electrical conductivity and viscosity during the fabrication process. The first strategy deals with a "two steps-one batch" process, during which the multiple emulsion is obtained in a single mixing vessel thanks to a specific positioning of an agitation mobile. The decrease of the interfacial tension in the system through a formulation change allows to considerably reduce the primary emulsion drop size, even in the case of a moderate mechanical energy supply. The second strategy deals with a one step process, in which two opposite curvatures are simultaneously created through the association of both formulation and composition effects. The control and the follow-up of the internal phase content allow to envision the possibility of systematising the protocol of multiple emulsion elaboration as well as the corresponding operating conditions.
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Joachim Allouche. Développement de nouvelles méthodes pour l'élaboration d'émulsions multiples eau/huile/eau. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2003. Français. ⟨NNT : 2003INPL014N⟩. ⟨tel-01750083⟩



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