Effect of the adsorption component of the disjoining pressure on foam film drainage

被引:3
作者
Karakashev, Stoyan I. [1 ]
Nguyen, Anh V. [2 ]
Tsekov, Roumen [1 ]
机构
[1] Univ Sofia, Dept Phys Chem, Sofia 1164, Bulgaria
[2] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia
基金
澳大利亚研究理事会;
关键词
SODIUM DODECYL-SULFATE; THIN LIQUID-FILMS; HYDROPHOBIC FORCES; AQUEOUS-ELECTROLYTE; LONG-RANGE; THERMODYNAMICS; ATTRACTION; REPULSION; MIXTURES;
D O I
10.1134/S1061933X13020099
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present work is trying to explain a discrepancy between experimental observations of the drainage of foam films from aqueous solutions of sodium dodecylsulfate and the theoretical DLVO-accomplished Reynolds model. It is shown that, due to overlap of the film adsorption layers, an adsorption component of the disjoining pressure is important for the present system. The pre-exponential factor of this adsorption component was obtained by fitting to the experimental drainage curves. It corresponds to a slight repulsion, which reduces not only the thinning velocity as observed experimentally but corrects also the film equilibrium thickness.
引用
收藏
页码:176 / 180
页数:5
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