Processing technology for microencapsulation of kiwi fruit seed oil by using air-flow piercing device

There is more than 60% of α-Linolenic acid in kiwi fruit seed oil. For avoiding oxidation of the oil, the microencapsulation of kiwi fruit seed oil using air-flow piercing device was studied, and the structure of the products was observed by scanning electron microscope(SEM), and the oxidation property of the products was tested. The results show that: the formulation for preparation of kiwi fruit seed oil microcapsule is sodium alginate concentration 2.5%, the best ratio of sodium alginate as wall material to kiwi fruit seed oil as core material is 1∶1, emulsifying agent is 0.2% tween-80+0.1% stearin, CaCl₂ concentration is 2.0%; the proper spray dry technological parameters are material flow speed 20 mL/min, spray air pressure 0.05 MPa, spray distance 40 cm. The products of kiwifruit seed oil microcapsules are in good microcosmic structure and antioxidation produced by using the technological parameters.