薏苡仁油微胶囊壁材的选择及工艺优化

Research on the wall material of coix seed oil microencapsulation and technology optimization

选用β-环糊精、变性淀粉HI-CAP100两种碳水化合物和大豆分离蛋白、明胶两种蛋白质类壁材进行组合初步筛选薏苡仁油微胶囊的壁材,再利用单因素试验研究了壁材的配比、芯壁比、乳化液壁材含量、乳化剂添加量对微胶囊包埋率的影响,最后通过L_9(3~4)正交试验确定了壁材的最佳配比。结果表明:大豆分离蛋白/变性淀粉HI-CAP100壁材组合在选用的6组壁材组合中综合表现出了良好的潜质,通过工艺优化得到了微胶囊的最佳配方:大豆分离蛋白占壁材质量分数为5%,芯壁比为60%,壁材含量为30%,乳化剂添加量为1.0%,由此得到的薏苡仁油微胶囊的包埋率为78.52%。

Coix seed oil was microencapsulated with four different wall materials includingfl- cyclodextrins, modified starch HI-CAP100, soybean protein isolated （SPI） and gelatin.Then single factor experiment was applied to study thewall material ratio, wall core ratio, wall material content and emulsifier on the effect of microencapsulation rate. The optimum ratio of the wall material was determined by L9 （3^4） tests. The results showed that the optimal formula of coix seed oil microcapsule was SPI isolates 5%, core/wall radio 60%, wall material concentration 30% and 1% emulsifier. The encapsulation rate could reach to 78.52% under the optimized conditions.