Abstract
Abstract Surface properties of binary surfactant mixtures of α-sulphonated fatty acid methyl ester (MES) with typical surfactants such as fatty alcohol polyoxyethylene ether (AEO9) and sodium alkylbenzene sulfonate (LAS) have been investigated at (298 ± 0.1) K and (318 ± 0.1) K, respectively. The synergistic interaction parameters of each binary surfactant mixture were calculated for the mixed micelles and mixed adsorption layers, then the composition of each binary surfactant mixture in the mixed micelles and mixed adsorption layers was obtained. The results show that the surface properties of each binary surfactant mixture are significantly better than that of any single surfactant in the mixed system. There are strong synergistic effects in the mixed micelles and mixed adsorption layers for each binary surfactant system. Each binary surfactant system exhibits synergism in mixed micelle formation, surface tension reduction efficiency and effectiveness.
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