中文摘要：

以大豆分离蛋白（SPI）和十二烷基硫酸钠（SDS）为壁材,以十六烷为芯材,通过复凝聚法制备了微胶囊.首先确定了SPI和SDS发生复凝聚的适宜pH、SPI/SDS配比、壁材浓度等.在确定的实验条件下进行复凝聚,凝聚物产率可达85%.改变搅拌转速和芯壁比,考察它们对微胶囊性能的影响.用光学显微镜观察了微胶囊形貌.用气相色谱测定了微胶囊的载药量和包覆率.芯壁比为2、搅拌转速为400r/min时所制备微胶囊的载药量可达61%.随着芯壁比的增大,微胶囊粒径及载药量都逐渐增大.

英文摘要：

Using soybean protein isolate （SPI）-sodium dodecyl sulfate （SDS） as wall materials and hexadecane as oil core material, microcapsules were prepared by complex coacervation. First, appropriate coacervation conditions, such as pH, SPI/SDS mass ratio and wall material concentration were determined. Coacervation efficiency was up to 85% under these experimental conditions. The influences of stirring speed and the ratio of core/wall on preparation of microcapsules were examined. The morphology of microcapsules was characterized using an optical microscope, and the loading of hexadecane and encapsulation rate were determined by gas chromatography. It was found that the loading of hexadecane was about 61% when the SPI/SDS ratio was at 2 with stirring rate at 400 r/min. With increase in the core/wall ratio, microcapsule sizes and hexadecane loading were both increased.