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 drying,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 under 40℃ and 60℃. This indicated that microcapsules cannot store up in long time and high temperature. The value of Tmof 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 equation and result showed microencapsules should store up in lower temperature and lower relative humidity.