化工学报2012，Vol.63Issue(6)：1816-1822,7.DOI:10.3969/j.issn.0438-1157.2012.06.023
U型微乳水相增溶过程微观结构的模拟
Mesoscopic simulation of microstructure changes in U-type microemulsion with water phase solubilizing
田一农 1解新安 1李雁 1李璐 1潘永华 1何康基1
作者信息
- 1. 华南农业大学食品学院,广东广州510642
- 折叠
摘要
Abstract
Dissipative particle dynamics (DPD) simulation method was used to study the ethyl butyrate/ ethanol/Tween80 ( Polysorbate 80) /water four-component microemulsion system. The dynamical process of microemulsion system formation was investigated. The microstructure and droplet shape changed with water phase solubilizing was researched. The boundary of microemulsion effective region was also predicted. The results of DPD simulation were as follows; (1) With water phase solubilizing, the system microstructure would be transformed at a specific water content, i.e. , 50% or 70% and meanwhile the shape of droplet transformed from columnar to spherical, then back to columnar and ultimately became spherical. (2) When oil-surfactant volume ratio was or less than 5 : 5, water phase could be infinitely diluted; when oil-surfactant volume ratio was 10 : 0, 9 : 1, 8 : 2, 7 : 3 and 6 : 4, the maximum water content of microemulsion system was respectively 25%, 30%, 35%, 45% and 50%, and microemulsion was water-in-oil. When the water content of microemulsion was over the maximum water content, it would be destroyed and became layered. Experiments showed that ( 1 ) According to the changes of microemulsion system conductivity, the microemulsion was water-in-oil when water content was less than 55%; the microemulsion was bi-continuous when water content was between 55% and 70%; the microemulsion was oil-in-water when water content was more than 70%. (2) The pseudo-ternary phase diagrams of system presented an effective region of microemulsion. The results of DPD simulation coincided with the experiment results.关键词
微乳体系/U型微乳/介观模拟/增溶水量Key words
microemulsion/ U-type microemulsion/ DPD (dissipative particle dynamic)/ water solubiliz-ing分类
化学化工引用本文复制引用
田一农,解新安,李雁,李璐,潘永华,何康基..U型微乳水相增溶过程微观结构的模拟[J].化工学报,2012,63(6):1816-1822,7.
