Inversion de phase d'émulsions induite par agitation

Abstract : This study deals with the catastrophic phase inversion produce by continuous stirring of an abnormal water-oil-surfactant system, without internal phase addition, in order to prepare concentrated and fine water-in-oil emulsions. The simultaneous conductivity and viscosity measurements of the system under stirring show that generally, the inversion takes place through the formation of a multiple w/O/W emulsion in which a portion of the external phase is continuously included as droplets in the dispersed phase drops. Consequently, the dispersed phase apparent volume increases until a critical value is reached and the inversion is triggered. In order to control this process, the influence of formulation, composition and stirring variables on the inversion mechanism and on its characteristic parameters is studied. The data collected can be used to prepare, in a minimal time, emulsions with required properties, by controlling the formulation and process conditions.
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Marianna Rondon Gonzalez. Inversion de phase d'émulsions induite par agitation. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL017N⟩. ⟨tel-01752812⟩

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