Preparation Technics and Properties Research of Peppermint Essential Oil Microcapsules

Abstract

Peppermint essential oil is widely used in food industry, but it is easy to be oxidized. In order to improve its oxidation stability, the peppermint essential oil microcapsule was prepared by single factor experiment and response surface optimization experiment in the paper. The effect of core wall ratio, pH value of complex coagulation and agitation speed on the embedding rate of peppermint essential oil microcapsules was studied respectively. The optimum experimental conditions were obtained as follows: core wall ratio, 1.9:1; pH value of complex condensation, 4.0; and the optimal agitation speed, 400r/min. The maximum embedding rate of peppermint essential oil microcapsules was 89.67%. POV value showed that the oxidative stability of peppermint essential oil microcapsules was significantly higher than peppermint essential oil.