β-聚葡萄糖酯化与性质表征及其在油脂微胶囊中的应用

以β- 聚葡萄糖和辛烯基琥珀酸酐为原料，采用湿法工艺制备辛烯基琥珀酸β- 聚葡萄糖酯。合适的制备工艺为底物质量分数60%、酸酐添加量为3%、pH8.5、反应温度40℃、反应时间4h，产物取代度为0.0209；辛烯基琥珀酸聚葡萄糖酯具有优越的水溶性、冻融稳定性和良好的乳化性，水溶液的黏度低。作为乳化剂在油脂微胶囊化应用中获得了较好的效果，微胶囊制品表面油含量低(1.35%)，包埋率高(93.5%)，电镜分析呈表面光滑，无裂缝的球形。

Preparation and Characterization of Octenylsuccinate β-Polydextrose Ester and Its Application in Powder Oil Microcapsules

2-Octenylsuccinic anhydride (OSA) and β-polydextrose were formed into octenylsuccinate ester by wet method. Substrate concentration of 60%, OSA amount of 3%, pH of 8.5, reaction temperature of 40 ℃ and reaction time of 4 h were proper conditions for the formation of octenylsuccinate ester and the degree of substitution of the product obtained under these conditions was 0.0209. The prepared OSA had excellent water solubility, freeze/thaw stability and emulsifying properties and its aqueous solution was a low-viscosity fluid. Its application in power oil micocapsules was promising and soybean oil micocapsules with OSA added as one of emulsifiers exhibited a lower surface oil content (1.35%) and a higher embedding efficiency (93.5%) and were observed to be spheres without cracks and with smooth surface under scanning electron microscope (SEM).