Study on the preparation method of citrus peels essential oil microcapsules

After the single factor experiment, response surface methodology was employed to optimize conditions for affecting the microencapsulation by using citrus peels essential oils as core materials and β-cyclodextrin as wall materials. The effect of wall-to-core material ratio, inclusion temperature, essential ethanol-to-essential oil ratio, inclusion time and β-cyclodextrin-to-water addition ratio on microencapsulation were investigated. The optimal reaction conditions were found to be:inclusion at 52℃ for 2h with wall-to-core material ratio of 5.8∶1 (g/mL) , ethanol-to-essential oil ratio of 19∶1 and water addition-to-β-cyclodextrin ratio of 8∶1 (mL/g) , resulting in a microcapsules retention rate of 65.97% and the embedding rate of 90.26%.