Preparation of Corn Germ Oil Microcapsules Based on Two-phase Shear Flow
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Abstract:
A new method forpreparing microcapsules was proposed based on the shear flow of the gas-liquid two phase.An atomization system was designed, in which the micro-nozzle was the core device. The influence law caused by the preparation process parameters and the formula were studied. The optimum preparation process parameters and the optimum formula were determined through orthogonal experiments. Experiments showed that, the content of liquid changed smoothly and the relative standard deviation Cv was smaller than 6.38%, and the atomization system showed high stability. The optimum conditions were determined as follows: diameter of the micro-nozzle 1000 μm,spray pressure 0.04 MPa, alginate concentration 1%, CaCl2 concentration 1%, ratio of the wall material to the core material 1:2 and micro-nozzle without parallel ends, under which the embedding rate could reach 56.44%. The corn germ oil microcapsules had good microstructure and dense surface, which may prolong the storage stage of the corn germ oil.
