Abstract The paper presents the experimental studies on influence of degree of initial adsorption coverage and structure of the dynamic adsorption layer over a rising bubble on stability of single foam films formed at surfaces of solutions of surface-active-substances namely n-octanol, n-hexadecyltrimethylammonium bromide (CTAB) and polyoxyethylenesorbitan monooleate (Tween80). Stability of single foam films formed by the colliding bubble under different experimental conditions were determined on the basis of systematic measurements of a single bubble lifetime in self-elaborated set-up. The experiments were supplemented by theoretical calculations of values of rupture thicknesses of the foam films, determined according to the Radove-Dimitrov-Ivanov model of drainage, which allows to consider formation of symmetrical and unsymmetrical foam films, depending on estimated structure of the dynamic adsorption layer. It was found that film lifetime depends strongly on the structure (stage of development) of motion-induced dynamic adsorption layer over the rising bubble surface. Moreover, it was shown that the bubble with completely different degree of initial adsorption coverage can form foam film of similar stability. This effect was attributed to the fact that eventual degree of the bubble adsorption coverage can reach comparable (and in some cases even equilibrium) value before film formation with identical structure of the DAL and degree of liquid/gas interface immobilization.

中文翻译：

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初始吸附覆盖率和气泡表面动态吸附层形成对单泡膜稳定性的影响

摘要 本文介绍了初始吸附覆盖程度和动态吸附层在上升气泡上的结构对表面活性物质溶液表面形成的单层泡沫膜稳定性影响的实验研究，即正辛醇，正辛醇，n-十六烷基三甲基溴化铵 (CTAB) 和聚氧乙烯脱水山梨糖醇单油酸酯 (Tween80)。在不同实验条件下由碰撞气泡形成的单泡沫膜的稳定性是基于在自拟设置中对单气泡寿命的系统测量来确定的。实验补充了泡沫膜破裂厚度值的理论计算，根据排水的 Radove-Dimitrov-Ivanov 模型确定，允许考虑对称和非对称泡沫膜的形成，取决于动态吸附层的估计结构。发现薄膜寿命在很大程度上取决于上升气泡表面上运动诱导的动态吸附层的结构（发展阶段）。此外，结果表明，初始吸附覆盖程度完全不同的气泡可以形成稳定性相似的泡沫膜。这种效应归因于这样一个事实，即在具有相同 DAL 结构和液体/气体界面固定程度的膜形成之前，气泡吸附覆盖的最终程度可以达到可比较的（在某些情况下甚至达到平衡）值。发现薄膜寿命在很大程度上取决于上升气泡表面上运动诱导的动态吸附层的结构（发展阶段）。此外，结果表明，初始吸附覆盖程度完全不同的气泡可以形成稳定性相似的泡沫膜。这种效应归因于这样一个事实，即在具有相同 DAL 结构和液体/气体界面固定程度的膜形成之前，气泡吸附覆盖的最终程度可以达到可比较的（在某些情况下甚至达到平衡）值。发现薄膜寿命在很大程度上取决于上升气泡表面上运动诱导的动态吸附层的结构（发展阶段）。此外，结果表明，初始吸附覆盖程度完全不同的气泡可以形成稳定性相似的泡沫膜。这种效应归因于这样一个事实，即在具有相同 DAL 结构和液体/气体界面固定程度的膜形成之前，气泡吸附覆盖的最终程度可以达到可比较的（在某些情况下甚至达到平衡）值。