辛烯基琥珀酸玉米多孔淀粉的制备及在姜黄素微胶囊壁材的应用  

Preparation of Octenyl Succinic Acid Corn Porous Starch and Its Applicationin Curcumin Microcapsule Wall Material

作　　者：周洋 彭秀安 郭祺 王馨悦 郑智元 喻禧 石剑 Zhou Yang;Peng Xiuan;Guo Qi;Wang Xinyue;Zheng Zhiyuan;Yu Xi;Shi Jian(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,Jiangsu;Jiangsu Provincial Key Laboratory of Green Catalytic Materials and Technology,Changzhou University,Changzhou 213164,Jiangsu)

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]常州大学江苏省绿色催化材料与技术重点实验室,江苏常州213164

出　　处：《中国食品学报》2023年第7期240-249,共10页Journal of Chinese Institute Of Food Science and Technology

基　　金：江苏省教育厅面上项目(19KJB80004)。

摘　　要：采用α-淀粉酶和糖化酶复合改性玉米淀粉制备多孔玉米淀粉(PS),用辛烯基琥珀酸酐(OSA)改性PS,以吸油率和取代度(DS)为指标,研究最佳制备条件。将OSA-PS用于姜黄素微胶囊壁材,研究其吸附性和缓释性。结果表明:PS的最佳工艺条件为:酶用量3%,酶配比1∶5,反应时间10 h,反应温度50℃,反应pH值6.0,此时PS的吸油率为139.37%。辛烯基琥珀酸多孔淀粉酯(OSA-PS)的最佳制备工艺条件为:底物质量分数25%,pH 8.5,酸酐添加量3.5%,反应时间4 h,反应温度40℃。此条件下OSA-PS的吸油率为120.05%,DS为0.02026。扫描电镜结果显示,经改性的淀粉出现明显的孔道结构;红外表征产物中存在羰基结构,表明成功完成酯化反应。X射线衍射光谱结果表明,改性过程发生在非定型区,用其制备的复合壁材——姜黄素(OAS-PS/CS-Cur)微胶囊具有良好的包埋性和缓释性能。In this study,porous corn starch(PS)was prepared by compound modification of corn starch withα-amylase and glucoamylase,and the PS was modified by octenyl succinic anhydride(OSA).The optimum preparation conditions were investigated with oil absorption ratio and degree of substitution(DS),and the absorbability and sustained-release properties of OSA-PS as curcumin microcapsule wall material were discussed.The results showed that the optimum preparation conditions of PS were as follows:enzyme dosage 3%,enzyme ratio 1∶5(g/g),reaction time 10 h,reaction temperature 50℃,pH 6.0,under which the oil absorption ratio of PS was 139.37%.The optimum synthesis conditions of OSA-PS were as follows:substrate mass fraction 25%,pH 8.5,anhydride 3.5%,reaction time 4 h,reaction temperature 40℃.Under these conditions,the substitution degree of OSA-PS was 0.02026,and the oil absorption ratio was 120.05%.SEM results showed that the modified starch formed obvious pore structure.The carbonyl structure in the FT-IR results indicated that the esterification reaction was successfully carried out.The results of XRD spectrum showed that the modification process occurs in the amorphous region.The OAS-PS/CS-Cur microcapsule has good encapsulation efficiency and sustained-release properties.

关 键 词：辛烯基琥珀酸多孔淀粉酯 吸油率 取代度 微胶囊 缓释 

分 类 号：TS231[轻工技术与工程—粮食、油脂及植物蛋白工程]