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A thermodynamic model of non-ionic surfactants' micellization in the presence of polyoxometalates
Abstract : Polyoxometalates (POMs) are nanometric metal−oxide anions with an unmatched range of chemical and physical properties. During the past decade, significant efforts have been made to study POM surface activity and self-assembly properties that are essential for catalysis applications and for producing organic−inorganic hybrid materials. A previous work highlighted the tungstosilicate (SiW12O404−) and tungstophosphate (PW12O403−) Keggin POM anions' spontaneous and noncovalent adsorption at the micellar surface of non-ionic surfactants. In this study, the critical micelle concentrations (CMC) of two non-ionic surfactants, the n-octyl-β-glucoside (C8G1) and the tetraethylene glycol monooctyl ether (C8E4), were measured in the presence of POMs, and we propose herein thermodynamic models to explain an increase or a decrease of the CMC depending on the choice of the POM/surfactant couple.
https://hal.umontpellier.fr/hal-02379312
Contributeur : Magali Duvail Connectez-vous pour contacter le contributeur
Soumis le : lundi 25 novembre 2019 - 16:01:10
Dernière modification le : mercredi 3 novembre 2021 - 07:12:35
Contributeur : Magali Duvail Connectez-vous pour contacter le contributeur
Soumis le : lundi 25 novembre 2019 - 16:01:10
Dernière modification le : mercredi 3 novembre 2021 - 07:12:35
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