吐温/短链醇/丁酸乙酯/水微乳体系相行为及微观结构  

The Phase Behavior and Microstructures of Tween 80/Short-chained Alcohol/Ethyl Butyrate/Water Microemulsion System

作　　者：刘君 王雅娟 李兴贞 曹昕琪 马传国[1] Liu Jun;Wang Yajuan;Li Xingzhen;Cao Xinqi;Ma Chuanguo(College of Food Science and Technology,Henan University of Technology,Zhengzhou 450001;National Engineering Research Center of Wheat and Corn Further Processing,Zhengzhou 450001)

机构地区：[1]河南工业大学粮油食品学院,郑州450001 [2]小麦和玉米深加工国家工程研究中心,郑州450001

出　　处：《中国食品学报》2022年第11期77-87,共11页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金面上项目(31972110);“十三五”国家重点研发计划项目(2016YFD0401404)。

摘　　要：通过绘制拟三元相图研究吐温/短链醇/丁酸乙酯/水微乳体系(MEs)的相行为,比较不同吐温表面活性剂、助表面活性剂短链醇及表面活性剂与短链醇的质量比(K_(m))对单相微乳区面积及全稀释通道数的影响,并基于NMR方法对吐温80/乙醇/丁酸乙酯/水单相微乳区全稀释线上(混合表面活性剂和油相的质量比9∶1,逐渐增大水相分数)的微观结构变化、分子运动性及分子间相互作用进行表征。揭示单相微乳区稀释线上可能存在油包水→有序双连续结构→水包油→肿胀胶束的微观结构变化;根据NMR-1D NOESY选择性激发试验结果推测双连续结构中各组分间的相互作用为:丁酸乙酯分子包裹在双层结构内部,与水分子较少接触;乙醇分子同时存在于液滴界面及水相中,与水相有直接作用;吐温80的亲水基团在界面外层与水相接触,疏水基团在界面内层伸向油滴内部,与水相无相互作用。In this paper,the phase behavior of Tween80/short-chained alcohol/ethyl butyrate/water microemulsion systems(MEs)were studied through the pseudo-ternary microemulsion phase diagram.The effects of different Tween emulsifiers,cosurfactants and mass ratios of surfactants and cosurfactants(K_(m))on the one-phased microemulsion areas and numbers of fully dilutable lines were investigated.And the microstructures and molecular interactions of microemulsions along the fully dilutable line L91(the water content kept growing with the constant mass ratio of surfactants and oil phase as 9∶1)were characterized based on NMR techniques.The possible microstructure transition of W/O→ordered bicontinuous microemulsion phase→O/W→swollen micelles was inferred with the water content gradually increasing along fully dilutable line L91.Based the NMR selective 1D NOESY experiments,the interactions between different component molecules in the bicontinuous phase were suggested,that is the ethyl butyrate was trapped inside the lamellar structure in less touch with water.And the cosurfactant molecules may locate in both the interface and the water phase and interact with both water and ethyl butyrate.Tween 80 was absorbed in the interface.And its hydrophilic moieties get in touch with and interact the water and ethyl alcohol molecules while its hydrophobic moieties get in touch with and interact with the ethyl butyrate molecules.

关 键 词：丁酸乙酯 水包油微乳体系 吐温 微乳相行为 伪三元相图 全稀释型微乳 

分 类 号：O648.23[理学—物理化学]