摘要
以玉米淀粉为原料,分别制备酶解、三偏磷酸钠(STMP)交联酶解和辛烯基琥珀酸(OSA)改性多孔淀粉载体,通过吸水率和吸油率评价吸附性,扫描电镜(SEM)观察形貌特征,激光共聚焦显微镜(CLSM)观察精油分布,并测定淀粉载体对精油的缓释效果。结果显示3种多孔淀粉的吸油率较原淀粉都有显著性提高(P<0.05),OSA多孔淀粉吸油率最高。SEM观察到STMP多孔淀粉有较大空腔,CLSM观察到精油充分吸附在了多孔内部;OSA多孔淀粉对精油保留率最佳,其缓释曲线符合动力学一级和二级方程。
Three porous starch carriers were prepared from corn starch by enzymatic hydrolysis,sodium trimetaphosphate(STMP)cross-linking and octenyl succinic acid(OSA)modi fication.The absorbency was evaluated by water absorption and oil absorption.The morphology was observed by scanning electron microscopy(SEM),the distribution of essential oil was observed by laser confocal microscopy(CLSM),and the sustained release effect of starch carriers on essential oil was determined.The results showed that the oil absorption rate of three kinds of porous starch was significantly higher than that of the original starch(P<0.05),and OSA porous starch had the best oil absorption rate.SEM showed that STMP porous starch had a large cavity,CLSM observed that essential oil was fully adsorbed in the porous interior;OSA porous starch had the best retention rate of essential oil,and its slow-release curve accorded with the first and second order kinetic equation.
作者
董芝宏
凌嘉艳
黄欣颖
罗志刚
DONG Zhi-hong;LING Jia-yan;HUANG Xin-ying;LUO Zhi-gang(South China University of Technology,College of Food Science and Technology,Guangzhou 510641,Guangdong,China)
出处
《粮食与油脂》
北大核心
2019年第6期57-61,共5页
Cereals & Oils
基金
国家自然科学基金资助项目(21576098、21376097)
中国博士后基金项目(2016M59078、2017T100616)
国家大学生创新性实验计划项目(201710561175)
广东省科技攻关项目(2016A050502005、2017B090901002)
广州市科技攻关项目(201508020082)
关键词
多孔淀粉
交联淀粉
OSA
缓释化
porous starch
cross-linked starch
OSA
sustained release
