With pomegranate seed oil from Huaiyuan area as core material,dextrin and soy protein isolate as composite wall materials,and soy lecithin as emulsifier, the pomegranate seed oil microcapsule was prepared by spray drying. Based on single factor experiment,the process conditions were optimized by orthogonal experiment as follows: mass fraction of composite wall material 10%, mass ratio of dextrin to soy protein isolate 1∶?2, dosage of soy lecithin 2.0%, mass ratio of core material to wall material 1∶?1.5, inlet temperature 185?℃, outlet temperature 75?℃, feed speed 25 mL/min. Under these conditions,the microencapsulation efficiency of pomegranate seed oil was 81.9%. The stability of pomegranate seed oil was enhanced obviously by the microencapsulation. |