海藻酸钠/多孔淀粉牛至精油微胶囊的制备  

Preparation of sodium alginate / porous starch oregano essential oil microcapsules

作　　者：王楠[1] 王建清[1] 王玉峰[1] 丁华[1] 

机构地区：[1]天津科技大学包装与印刷工程学院,天津300222

出　　处：《食品工业科技》2016年第9期224-227,234,共5页Science and Technology of Food Industry

基　　金：国家"十二五"科技支撑计划项目(2011BAD24B01);天津食品安全低碳制造协同创新中心科技项目

摘　　要：为提高对天然植物精油的包埋效果,以海藻酸钠和多孔淀粉为壁材,以牛至精油为芯材,采用锐孔法制备多孔淀粉/海藻酸钠牛至精油微胶囊。通过单因素实验和正交实验对精油微胶囊的制备工艺进行了优化,并通过扫描电镜对精油微胶囊的结构进行了表征。得到精油微胶囊优化的制备条件为:精油淀粉比1∶3,海藻酸钠溶液浓度2.5%,氯化钙浓度1.5%,针头型号9号,在此条件下精油微胶囊包埋率为88.25%,产率为44.27%,粒径为915μm。扫描电镜图像结果表明以多孔淀粉与海藻酸钠为壁材制得的微胶囊外观良好,表面呈交联多孔结构,一定程度上弥补了单一壁材海藻酸钠所制微胶囊外观上的缺陷。In order to improve the entrapment efficiency of natural plant essential oil,sodium alginate and porous starch were used as wall materials,and oregano essential oil was used as core material to prepare sodium alginate / porous starch oregano essential oil microcapsules with the sharp hole method.Single factor test and orthogonal test were adopted to optimize the preparation process and the structure of essential oil microcapsules were characterized by scanning electron microscopy.The results showed that the optimum process of essential oil microcapsules preparation was 1 ∶ 3 of the essential oil and starch ratio,2.5% of the sodium alginate solution concentration,1.5% of the calcium chloride solution concentration and 9# needle,and the embedding rate reached88.25%,yield was 44.27% and particle size was 915 μm.Scanning electron microscope images showed that the microcapsules prepared with porous starch and sodium alginate as wall materials had good appearance,the surface presented cross- linked porous structure,which made up for the appearance defects as single wall material of sodium alginate microcapsules in a certain extent.

关 键 词：多孔淀粉 锐孔法 微胶囊 牛至精油 

分 类 号：TS225.3[轻工技术与工程—粮食、油脂及植物蛋白工程]