EPA藻油微胶囊工艺及其制备过程中脂肪酸组成的变化

为防止富含EPA和DHA(54.79%)藻油氧化,以乳清分离蛋白,HI-CAP100和麦芽糊精(DE20)为壁材,采用喷雾干燥法对其进行固体化研究,以包埋率等为指标,确定最佳壁材和工艺条件,并研究了固化过程中EPA藻油脂肪酸组成变化。结果表明,HI-CAP100、乳清分离蛋白与麦芽糊精(DE20)最佳比例为2∶2∶1,单甘脂含量1%,固形物含量40%,35MPA下均质3次,进风温度185~195℃,出风温度90~100℃,载油量30%时,包埋率高达97.03%。载油量为50%时,包埋率高达92.88%。微胶囊制备过程中EPA和DHA分别仅降低了1.021%和1.327%,说明藻油在喷雾过程中PUFA氧化不明显,包埋效果较好。

The Process of EPA Algae Oil Microcapsule and the Change of Fatty Acid Composition

To prevent the oxidation of EPA and DHA(54.79%)algae oil,Using whey separation protein,HI-CAP100 and malt dextrin(DE20)as wall material,the spray drying method was used to study its solid state,The opti mum ratio of wall material and production conditions were determined with the embedding rate as the index,and the change of fatty acid composition of EPA algae oil in the curing process was studied.The experimental results show that the optimum proportion of HI-CAP100,whey separation protein and maltodextrin(DE20)was 2∶2∶1,the content of monoglyceride was 1%,the content of solid substance was 40%,and the homogenization condition was 35MPA three times.The air inlet temperature is 185-195℃and the air outlet temperature is 90-100℃.When the oil load is 30%,the embedding rate is up to 97.03%and the oil load is 50%,the embedding rate is up to 92.88%.In the process of microcapsule preparation,EPA and DHA were only reduced by 1.021%and 1.327%respectively,indicating that the oxidation of PUFA was not obvious during the spray process,and the embedding effect was better.