高不饱和脂肪酸玫瑰果籽油微胶囊制备及品质分析

Preparation and Quality Analysis on the Microencapsulation of Rose Hip Seed Oil with High Content of Unsaturated Fatty Acids

玫瑰果籽油中含有萜类、VE、不饱和脂肪酸等活性成分,具有降低胆固醇,防治心脏病等多种生理功能,其营养价值很高。籽油中不饱和脂肪酸极易氧化酸败,不利于加工储藏。本文利用气相色谱检测玫瑰果籽油脂肪酸组成,并结合微胶囊技术,对玫瑰果籽油微胶囊工艺参数及产品品质进行分析。气相色谱检测表明:玫瑰果籽油中不饱和脂肪酸相对含量高达90%以上,以亚油酸、亚麻酸为主。微胶囊优化的工艺条件为:以辛烯基琥珀酸淀粉与麦芽糊精为复配壁材,壁材复配比4∶1,壁材含量25%,载油量35%。乳液经喷雾干燥可得到橘红色玫瑰果籽油微胶囊产品,其含水量为2.17%,包埋率为90.17%。扫描电镜显示微胶囊表面无明显凹陷,结构致密。本试验为高不饱和脂肪酸玫瑰果籽油微胶囊的制备提供理论依据。

Rose hip seed oil contains terpenoids, vitamin E, unsaturated fatty acids and other active components,having the physiological functions of lowing cholesterol and prevention of heart disease. However, the unsaturated fatty acids could be oxidative easily, being unfavorable to processing and storing. In this article, the rose hip seed oil was detected by gas chromatography（GC）, then the processing parameters and quality of the microencapsulation was well studied. The gas chromatography showed that the relative content of unsaturated fatty acids was as high as 90% above,mainly linoleic acid and linolenic acid. The optimized processing conditions of microencapsulation were as follows, the starch octenylsuccinate and maltodextrin as the composite wall materials in a ratio of 4 ∶1, the content of wall material25%, the content of oil 35%（weight）. The microcapsule products of rosehip seed oil obtained by spray drying contained2.17% water, and the embedding rate was 90.17%. Scanning electron microscopy（SEM） showed the microcapsule was compact and uniform without obvious concave on surface.