Abstract
Abstract The properties of microscopic foam films formed by two commercial surfactants, sodium alkylethoxy sulfate and linear alkylbenzene sulfonic acid as well as by their mixtures are studied. The results obtained refer to the following dependences: surface tension on surfactant concentration at three different electrolyte concentrations; film thickness on electrolyte concentration at constant surfactant concentration; film thickness on surfactant concentration at constant electrolyte concentration; disjoining pressure on film thickness (disjoining pressure isotherms). Calculated are the following physicochemical parameters: the diffuse electric layer potential, surface charge, molecule area for the respective surfactant and close packing surface concentration of the adsorption layer. The data obtained provide an option to link the model foam film experiments with the real processes and systems.
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