Nanoemulsions with enhanced temperature stability using thermo-sensitive association of nonionic surfactant and amphiphilic polyelectrolytes

Abstract : Aqueous mixtures containing a non-ionic surfactant (tetraethylene glycol monododecylether, C12E4), an amphiphilic polymer (poly(sodium acrylate) hydrophobically modified with azobenzene groups randomly attached along the chains, HMPA) and 0.3 M NaNO3 were studied regarding the associations between macromolecules and surfactant assemblies (micelles or lamellar phases) at various temperatures (4-37 degrees C). The effects of the thermo-induced transition of surfactant assemblies from micelles to lamellar phase on phase separation behavior were systematically investigated as a function of surfactant and polymer concentration, polymer structure (amount of grafted hydrophobic groups) and temperature. Rheological properties of polymer-rich coacervates revealed thermo-thickening behavior, in accordance with phase separation behavior. Finally, bulk phenomena were applied to design nanoemulsions with improved temperature stability taking the opportunity of strengthening interfacial layers through thermo-thickening properties. (C) 2011 Elsevier B.V. All rights reserved.
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2012, 396 (2), pp.115 - 121. 〈10.1016/j.colsurfa.2011.12.051〉
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https://hal.sorbonne-universite.fr/hal-01576593
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Soumis le : mercredi 23 août 2017 - 14:45:51
Dernière modification le : mardi 24 juillet 2018 - 16:43:02

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Johanna Galindo-Alvarez, Véronique Sadtler, Philippe Marchal, Patrick Perrin, Christophe Tribet, et al.. Nanoemulsions with enhanced temperature stability using thermo-sensitive association of nonionic surfactant and amphiphilic polyelectrolytes. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2012, 396 (2), pp.115 - 121. 〈10.1016/j.colsurfa.2011.12.051〉. 〈hal-01576593〉

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