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Oxo-alcohol ethoxylates: surface and thermodynamic properties and effect of various additives on the cloud point

Canselier, Jean-Paul and Nogueira Duarte, Lindemberg de Jesus Oxo-alcohol ethoxylates: surface and thermodynamic properties and effect of various additives on the cloud point. (2005) Tenside Surfactants Detergents, 42 (5). 299-306. ISSN 0932-3414

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In this study the thermodynamic properties of various Oxo-alcohol ethoxylates related to their adsorption at the air/water interface and to their micellization have been studied. The effect of various additives including electrolytes, alcohols, polar aromatic solutes, and ionic and nonionic surfactants on the cloud point of aqueous solutions of the same surfactants has also been investigated. Salting-out electrolytes lower the cloud point while salting-in species raise it. Except for the totally water-miscible alcohols, most hydroxylated compounds lower the cloud point. Phenols, aromatic alcohols, and amines seem to interact preferentially with the ethylene oxide groups of the micelles, leading to strong dehydration, and consequently lowering the cloud point. On the contrary, by forming mixed micelles, an anionic surfactant strongly raises the cloud point of the nonionic.

Item Type:Article
Additional Information:Free access for subscribers about this article in : http://www.tsd-journal.com/directlink.asp?TS100272
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
Deposited On:22 Jul 2009 11:51

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