大豆蛋白和鱼油双层微囊化SOD优化条件的研究

Optimizing Microencapsulation of SOD with Soy Protein Isolate and Fish Oil

以大豆可溶性蛋白、鱼油为双层壁材 ,采用喷雾干燥法制备出SOD微胶囊 ,考察了SOD包埋率、活性和鱼油的过氧化值 ,结果显示产品的包埋率和抗氧化性均有提高 ,微囊在 45℃条件下 ,较大豆蛋白单层微囊的稳定性显著增加。经正交法优化选择 ,微囊的最佳制备条件为 :进风温度 1 95℃ ,均质压力 5 0MPa ,出风温度 1 1 0℃ ,外层壁材选择大豆可溶性蛋白和麦芽糊精 ,鱼油与SOD溶液比 (g∶mL)为 4∶1 ,鱼油占外层壁材百份比为 40 % ,SOD包封率达 3 8 65 %。

This study details the microencapsulation of superoxide dismutase(SOD) by sprayer drying. Soy protein isolation (SPI) and fish oil were chosen as out-wall and inner-wall material of microcapsule to increase the oxidization resistance of SOD and inner-wall material of microcapsule to increase the oxidization resistance of SOD and encapsulation rate. Microencapsulation of SOD was produced with good quality and rather high retention ratio of 38.65%. Based on the orthogonal test, the optimal parameters of microencapsulation of SOD by spray drying were as follows: feed concentration being at 40%, inlet temperature of 195℃, homogenizing pressure at 500MPa, outlet temperature being 110℃, out-wall system of microcapsule ingredient mainly being composed of SPI and malt dextrin, the ratio of fish oil to SOD solution and that of fish oil to out-wall material solution being 4:1(v/v) and 2:5(v/v) respectively, inlet temperature being 160～180℃, and outlet temperature being 70～80℃.