ITPN   24979
INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Effect of aqueous phase composition on particle size and stability of sunflower oil/sodium caseinate nanoemulsions
Autor/es:
JUAN MONTES DE OCA; ROBERTO JORGE CANDAL; MARIA LIDIA HERRERA
Lugar:
Orlando - Florida
Reunión:
Congreso; 106 th AOCS Annual Meeting; 2015
Institución organizadora:
American oil Chemists' Society
Resumen:
Manynanoemulsions are currently formulated with synthetic surfactants. The objective of thepresent work was to prepare transparent nanoemulsions using a naturalemulsifier. Nanoemulsions were prepared by using the evaporative ripeningmethod. In this method, a volatile organic compound (such as ethyl acetate) wasremoved from the sample by a thermal process at low pressure which produces a dropletshrinkage down to nanometer sizes. Maintaining fix concentrations of 1.64 wt.%sunflower oil and 0.98 wt.% sodium caseinate, several concentrations of sucroseor trehalose were added to the system: 0, 2, 4, 6, 8, 10% w/w. Analysis wereperformed by dynamic light scattering techniques, determining the sizedistribution and the zeta potential of the samples. Results show that using theevaporative method, stable monodispersed nanoemulsions were obtained with amean diameter between 100-200 nm and a narrow distribution. If ethyl acetatewas not added to the sample, conventional emulsions in the range of micrometerswere obtained with a polidispersed distribution. Moreover, increasing thedisaccharide concentration, narrower size distributions were obtained andmicrometer droplet sizes, which appeared in a very small amount for lowdisaccharide concentrations, disappeared.