A Low-Energy Emulsification Batch Mixer For Concentrated Oil-In-Water Emulsions
Résumé
The presented work shows the formation of a monodisperse High Internal Phase Ratio (HIPR) 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 W/O) and similar densities (1/0.974 for W/O). The oil ratio in the mixture remains constant at 91% [w/w] for each experiment. The simple design of the new mixer leads to a low-energy process, characterized by very low rotational speed, laminar flow and no need for fluid heating. The droplet size distribution during the emulsification was investigated according to different physical and formulation parameters such as stirring time, rotational speed, surfactant type, concentration, and salt addition. We show that all studied parameters except salt addition allow a precise control of the concentrated emulsion droplet size distribution, which governs the rheological behavior of the emulsion and its stability. The formed HIPR emulsion shows two shear-thinning domains.
Origine | Fichiers produits par l'(les) auteur(s) |
---|
Loading...