Modelization of the release from a tetradecane/water/hexadecane multiple emulsion: evidence of significant micellar diffusion

M Stambouli; J R Avendano-Gomez; I Pezron; D Pareau; D Clausse; J L Grossiord

doi:10.1021/la060486i

Modelization of the release from a tetradecane/water/hexadecane multiple emulsion: evidence of significant micellar diffusion

Langmuir. 2007 Jan 30;23(3):1052-6. doi: 10.1021/la060486i.

Authors

M Stambouli¹, J R Avendano-Gomez, I Pezron, D Pareau, D Clausse, J L Grossiord

Affiliation

¹ Laboratoire de Génie des Procédés et Matériaux, Ecole Centrale Paris, 92295 Châtenay-Malabry Cedex, France.

PMID: 17241013
DOI: 10.1021/la060486i

Abstract

The release of tetradecane from a multiple emulsion of the type tetradecane/water/hexadecane was studied experimentally using the differential scanning calorimetry technique. The kinetics of the tetradecane release was measured for three formulations containing different concentrations of hydrophilic surfactant (2%, 4%, and 7%). A new mass transfer model derived from the shrinking core model was developed. The values of the model parameters deduced from the least-squares fittings led to the determination of the tetradecane diffusivity. Thus, the preponderant mechanism of mass transfer was proved to be micellar diffusion and not molecular diffusion. This conclusion was confirmed by considering the effect of the change in the hydrophilic surfactant concentration.