采用傅里叶红外光谱、 X射线衍射、 紫外可见光谱、 激光纳米粒度仪和扫描电镜分析了自制的辛烯基琥珀酸酶解淀粉酯(EOSS)的性质和结构。 轻度酶解淀粉经辛烯基琥珀酸接枝改性后, 反应只引入辛烯基琥珀酸基团; 酯化作用主要发生在无定形区, 而对淀粉颗粒的晶型无影响; EOSS具有较高的透明度, 且透明度随着取代度的增加而增大; EOSS制成的油脂乳状液粒度小, 粒径大小分布均匀, 具有较好的乳化性和乳化稳定性; 以EOSS为壁材, 采用喷雾干燥法制得的油脂微胶囊颗粒包埋效果良好。 实验结果表明, 制备的EOSS具有良好的性质和结构, 可作乳化剂和微胶囊壁材。

Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV-Vis spectra, laser nano size detector (LNSD) and scanning electron microscope (SEM) were employed to analyze the characters and structure of enzyme and octenyl succinic anhydride modified starch. The results indicated that the enzymatic starch reacted with octenyl succinic anhydride, bringing only octenyl succinic anhydride groups but not any other groups. The esterification of enzymatic starch only took place in amorphous region, but had no effect on the crystal form of starch granule. The clarity of EOSS increased with the increase in substitution degree. The particle size of oil emulsion made by EOSS was fine and well-distributed, meaning that the emulsion has excellent emulsibility and emulsifying stability. The embedding of oil encapsulated with EOSS is fine. It can be concluded that the properties of EOSS is excellent, and can be used as emulsifier and wall material of microcapsule.