2015 Volume 16 Issue 3 Pages 235-240
The effect of emulsification on encapsulation efficiency of microcapsule, consisting of dextrin (wall material), methyl linoleate (core material), and polysorbate (emulsifier), was examined. In this study, normal or 2-step emulsification was adopted to improve encapsulation efficiency of the microcapsule. The results showed that the encapsulation efficiency of the microcapsule prepared by 2-step emulsification was higher than that of the microcapsule by normal emulsification. Oil droplet size distributions of emulsion prepared by both emulsifications were almost the same, but DSC curves during freezing were different. The exothermic peak of the emulsion by 2-step emulsification was shifted to a higher temperature. This shift indicated that the oil droplets in the emulsion were more dispersed. Hence, it was suggested that the dispersed state of oil droplets might affect the encapsulation efficiency.
