表面张力
化学工程
材料科学
吸附
接触角
润湿
分子动力学
曲面(拓扑)
水溶液
分子
聚合物
表面能
表面压力
分离压力
胶束
作者
Live Rekvig,Bjørn Hafskjold,Berend Smit
出处
期刊:Langmuir
[American Chemical Society]
日期:2004-11-20
卷期号:20 (26): 11583-11593
被引量:33
摘要
We use dissipative particle dynamics (DPD) and molecular models to simulate interacting oil/water/surfactant interfaces. The system comprises sections of two emulsion droplets separated by a film. The film is in equilibrium with a continuous phase, in analogy with the surface force apparatus. This is achieved by combining DPD with a Monte Carlo scheme to simulate a μVT ensemble. The setup enables the computation of surface forces as a function of the distance between the two interfaces, as well as the detection of film rupture. We studied monolayers of nonionic model surfactants at different densities and compared oil−water−oil and water−oil−water emulsion films. Between surfactant monolayers facing each other tails-on (water−oil−water films), we observed repulsive forces due to the steric interaction between overlapping hydrophobic tails. The repulsion increases with surfactant density. Conversely, no such repulsion is observed between surfactant monolayers facing each other heads-on. Instead, the film r...
科研通智能强力驱动
Strongly Powered by AbleSci AI