茶油微胶囊的性质

Characteristic of microencapsulated camellia seed oil

以麦芽糊精、大豆分离蛋白(SPI)为壁材,通过喷雾干燥法制备茶油微胶囊,对微胶囊的性质进行了研究。扫描电镜(SEM)观察结果显示:茶油微胶囊表面形态良好,但经40、60℃,30 d贮藏后,茶油微胶囊均出现了干瘪现象,表明微胶囊不能经受长时间的高温贮藏;差示扫描量热仪(DSC)测得微胶囊产品热溶解温度(Tm)为157.2℃,表明产品具有较好的贮藏稳定性及应用范围;TG测得茶油微胶囊280℃开始分解,表明加工温度不宜超过280℃;微胶囊在不同温度和湿度下的释放研究表明,微胶囊应该在低温、低湿度下进行贮藏。

Characteristic of microencapsulated camellia seed oil was studied. The oil was produced by spray dr- ying, and used maltodextrin and soybean protein isolate （SPI） as the wall material. Fine surface of microcapsules were observed under scanning electron microscopy（SEM） , and shriveled microcapsules were observed in 30 day un- der 40℃ and 60℃. This indicated that microcapsules cannot store up in long time and high temperature. The value of Tm of microencapsulated camellia seed oil was 157.2 ℃ determined by differential scanning calorimetry（DSC）. This showed good stability and broad application range. The value of decomposion of microencapsulated camellia seed oil was 280 ℃ determined by TG, which indicated the processing temperature can not exceed 280℃. The retention ration of microencapsulated camellia seed oil was measured at different temperature and relative humidity using Avrami＇ s e- quation and result showed microencapsules should store up in lower temperature and lower relative humidity.