沙棘籽油微胶囊的制备及氧化稳定性评价

沙棘籽油是一种富含不饱和脂肪酸的功能性油脂,容易氧化变质。本文将添加天然抗氧化剂与微胶囊制备技术相结合,改善沙棘籽油的氧化稳定性,延长货架期。首先测定了沙棘籽油的组成成分,然后以沙棘籽油为芯材,添加经过筛选的天然抗氧化剂L-AP,以辛烯基琥珀酸淀粉钠,酪蛋白酸钠及麦芽糊精等为壁材制备沙棘油微胶囊,并通过65 ℃烘箱加速保藏实验评价其氧化稳定性。结果表明:沙棘籽油中不饱和脂肪酸含量占总脂肪酸的80.6%±2.10%;制备沙棘籽油微胶囊的最佳配方为辛烯基琥珀酸淀粉钠15%、酪蛋白酸钠5%、麦芽糊精5%、抗性糊精30%、甘蔗浓缩汁10%、沙棘籽油30%、异麦芽酮糖5%,并添加3 g/L三聚磷酸钠,包埋率高达91.8%±1.59%;65 ℃烘箱加速保藏实验结果表明,添加抗氧化剂并制备微胶囊能有效提高沙棘籽油的氧化稳定性。

Preparation and Oxidation Stability of Sea Buckthorn Seed Oil Microcapsules

Seabuckthorn seed oil is a functional oil rich in unsaturated fatty acids,and therefore highly susceptible to oxidation. This article combined the addition of natural antioxidants with microcapsule preparation technology,which could resist the oxidation. Firstly,the composition of seabuckthorn seed oil was determined,then seabuckthorn seed oil was used as the core material,and the selected natural antioxidant L-AP was added,and sodium starch octenyl succinate,sodium caseinate and maltodextrin were used for encapsulation by spray drying. Seabuckthorn oil microcapsules were prepared from the materials,and the oxidation stability was evaluated by an accelerated storage experiment in an oven at 65 ℃. Results showed that sea buckthorn seed oil had high unsaturated fatty acids contents 80.6%±2.10%. Ultimately,microcapsules contained 15% OSA-modified starch,5% casein,5% maltodextrin,30% resistant malt dextrin,10% sugarcane juice concentrate,30% sea buckthorn seed oil,5% isomaltulose and 3 g/L sodium tripolyphosphate. The encapsulation efficiency of microcapsules was as high as 91.8%±1.59%. Sea buckthorn seed oil were placed inside a thermostated chamber at 65 ℃ showed that microcapsules with antioxidants could effectively improve the oxidation stability of sea buckthorn seed oil.