化工学报2012，Vol.63Issue(8)：2507-2517,11.DOI:10.3969/j.issn.0438-1157.2012.08.024
滑移边界对含表面活性剂超薄液膜去湿特性的影响
Effect of slip boundary conditions on dewetting dynamics of ultrathin films covered by insoluble surfactants
摘要
Abstract
The dewetting of ultrathin liquid films in the presence of insoluble surfactant monolayer was studied. Under slip boundary conditions, coupled nonlinear evolution equations for film thickness and surfactant concentration based on lubrication theory were used. The dewetting evolution of films was simulated using PDECOL program, and the effects of slip length on dewetting dynamics, including endogenous and exogenous surfactant cases were investigated. Numerical results showed that the impact of slip boundary on dewetting process was closely related to initial surfactant distribution, and was obviously different under various equilibrium film thicknesses. Slip boundary generally played a role of improving the stability of ultrathin insoluble surfactant-covered films, and especially for small equilibrium film thickness, slip boundary could restrain the dewetting processes effectively. For spinodally stable films, the effect of slip boundary on exogenous surfactant dewetting was more noticeable than that on endogenous surfactant case.关键词
滑移边界/去润湿/超薄液膜/非溶性表面活性剂Key words
slip boundary/ dewetting/ ultrathin films/ insoluble surfactant分类
化学化工引用本文复制引用
叶学民,沈雷,李春曦..滑移边界对含表面活性剂超薄液膜去湿特性的影响[J].化工学报,2012,63(8):2507-2517,11.基金项目
国家自然科学基金项目(10972077) （10972077）
中央高校基本科研业务费专项基金(09MG33,10MG16). （09MG33,10MG16）
