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A low-energy emulsification batch mixer for concentrated oil-in-water emulsions

Authors

  • Sylvain Caubet,

    1. Institut Pluridisciplinaire de Recherche Environnement et Matériaux (IPREM UMR 5244), Equipe de Physique et Chimie des Polymères (EPCP), Université de Pau et des Pays de l'Adour (UPPA), Hélioparc, Avenue P. Angot, 64000 Pau, France
    2. Laboratoire de Thermique Energétique et Procédés (LaTEP), Université de Pau et des Pays de l'Adour (UPPA), IFR, BP 7511, 64075 Pau cedex, France
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  • Yves Le Guer,

    Corresponding author
    1. Laboratoire de Thermique Energétique et Procédés (LaTEP), Université de Pau et des Pays de l'Adour (UPPA), IFR, BP 7511, 64075 Pau cedex, France
    • Laboratoire de Thermique Energétique et Procédés (LaTEP), Université de Pau et des Pays de l'Adour (UPPA), IFR, BP 7511, 64075 Pau cedex, France
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  • Bruno Grassl,

    1. Institut Pluridisciplinaire de Recherche Environnement et Matériaux (IPREM UMR 5244), Equipe de Physique et Chimie des Polymères (EPCP), Université de Pau et des Pays de l'Adour (UPPA), Hélioparc, Avenue P. Angot, 64000 Pau, France
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  • Kamal El Omari,

    1. Laboratoire de Thermique Energétique et Procédés (LaTEP), Université de Pau et des Pays de l'Adour (UPPA), IFR, BP 7511, 64075 Pau cedex, France
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  • Eric Normandin

    1. Plateau Innov'Adour (UPPA), Université de Pau et des Pays de l'Adour (UPPA), Hélioparc, Avenue P. Angot, 64000 Pau, France
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Abstract

This work shows the formation of a high internal phase ratio oil-in-water (O/W) emulsion using a new type of a two-rod batch mixer. The mixture components have sharply different viscosities [1/3400 for water-in-oil (W/O)], similar densities (1/0.974 for W/O), and an O/W ratio of 91% (wt/wt). The simple design of this mixer leads to a low-energy process (106 < energy density [J m−3] < 107), characterized by low rotational speed and laminar flow. The droplet size distribution during the emulsification was investigated according to different physical and formulation parameters such as stirring time (few minutes < t < 1 h), rotational speed (60 < Ω < 120 rpm), surfactant type (Triton X-405 and X-100), concentration (from 1 to 15.9 wt % in water), and salt addition (30 g/L). We show that all studied parameters allow a precise control of the droplet size distribution and the rheology. The resulting emulsions are unimodal and the mean droplet diameter is between 30 μm and 8 μm. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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