Abstract: This paper studied the procyanidins double-coated microencapsulating technology by double emulsion-spray drying, using soybean protein isolated, malt dextrin, sunflower seed oil, emulsifier et al. as wall material. The optimum proportion of wall material was determined by using three-factor single shape barycenter method. The results showed that the optimum spray-drying parameters are as follows: the homogenizing pressure 40MPa, the inlet air temperature 195～200℃ and the feeding speed 45ml/min. The bilayered microencapsulation shows good structure and stability.

Key words: procyanidins, bilayer, microencapsulation, controlled release, stability