Abstract
The behavior of binary mixtures composed of a nonionic surfactant Triton X-100 (TX-100) and monomeric dodecyltrimethylammonium bromide (DTAB) or gemini N,N’-bis(N-dodecyl-N,N-dimethyl)-1,2-diammonium ethane dibromide (DDAB) cationic surfactants is studied upon micellization, wetting of Teflon and adsorption at the solution-air and solution-Teflon interfaces. The compositions of mixed micelles and adsorption layers, as well as the parameters of interaction between the surfactants (mixture components), were calculated using the Rubingh-Rosen model. For both mixtures, the interaction parameters are negative, and their absolute values increase in the following order: mixed micelles ≈ adsorption layers at the solution-air interface < adsorption layers at the solution-Teflon interface. The absolute values of the interaction parameters for TX-100-DDAB mixtures are larger than those for TX-100-DTAB mixtures. The adsorption of both mixtures on Teflon demonstrates synergistic effects. In case of TX-100-DDAB mixtures, the synergistic effects are also observed upon micellization, reduction of the surface tension, and wetting of Teflon.
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Original Russian Text © O.A. Soboleva, G.A. Badun, B.D. Summ, 2006, published in Kolloidnyi Zhurnal, 2006, Vol. 68, No. 2, pp. 255–263.
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Soboleva, O.A., Badun, G.A. & Summ, B.D. Colloidal properties of binary mixtures of a nonionic surfactant and monomeric or gemini cationic surfactants. Colloid J 68, 228–235 (2006). https://doi.org/10.1134/S1061933X06020153
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DOI: https://doi.org/10.1134/S1061933X06020153