Abstract:

Microcapsules of apple polyphenols from the cultivar ‘Hanfu’ were prepared by complex coacervation method
with gelatin and chitosan as wall materials. The effects of various factors on the quality of microcapsules were explored.
Response surface methodology was employed to establish the optimal process conditions: gelatin/chitosan ratio of 1:1, wall
material concentration of 1%, core material/wall material ratio of 1:1, reaction temperature of 54 ℃ and pH 7. Under these
conditions, the highest embedding efficiency of apple microcapsules was experimentally observed to be 93.2%.

Key words: Hanfu apple, polyphenols, complex coacervation, microencapsulation