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Article Dans Une Revue Journal of Surfactants and Detergents Année : 2021

Cation Effect on the Binary and Ternary Phase Behaviors of Double-Tailed Methanesulfonate Amphiphiles

Résumé

A series of symmetrical dialkyl methanesulfonate amphiphiles [DiCnCHSO3]mM (n = 6, 7, 8) with different counter cations (Mm+ = H+, Li+, Na+, K+, Cu2+, Zn2+, Mg2+, Ca2+, Sc3+) were synthesized in five steps. Their solubility and critical micelle concentration (CMC) in water were determined highlighting a huge effect of the chain length and the nature of the cation. The hydrophilic–lipophilic balance of the surfactants were assessed with the phase inversion temperature (PIT)-slope method based on the deviation from the PIT of the reference C10E4/n-octane/0.01 M NaCl(aq) emulsion through addition of increasing amounts of the dialkyl methanesulfonates. The hydrophilicity of the surfactants was thus ranked in terms of dPIT/dxsulfonate. A “cation” scan with the [DiC6CHSO3]mM/benzene/water systems at fw = 0.5 was finally performed confirming the hydrophilicity ranking obtained with the PIT-slope method. It revealed that the [DiC6CHSO3]2Mg behaves as a “Balanced Surfactant” able to form spontaneously a three-phase microemulsion system (Winsor III) just in the presence of water and oil, in the same way as the catalytic surfactant dimethyldioctylammonium molybdate, which has the same PIT-slope.
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hal-04548783 , version 1 (16-04-2024)

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Jesus Ontiveros, Bing Hong, Kenji Aramaki, Christel Pierlot, Jean-Marie Aubry, et al.. Cation Effect on the Binary and Ternary Phase Behaviors of Double-Tailed Methanesulfonate Amphiphiles. Journal of Surfactants and Detergents, 2021, Journal of Surfactants and Detergents, 24 (3), pp.401-410. ⟨10.1002/jsde.12491⟩. ⟨hal-04548783⟩
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