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Dive into the research topics where C. Vaution is active.

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Featured researches published by C. Vaution.


Colloids and Surfaces | 1985

Influence of sodium dodedecylsulphate and of inorganic electrolytes on the micellar solubilization of butobarbitone in aqueous polyoxyethylene lauryl ether solutions at 293.15 k

Claude Treiner; C. Vaution; Edgar Miralles; F. Puisieux

Abstract The partition coefficient between water and the micellar phase of a barbituric acid, butobarbitone, has been determined in mixed aqueous solutions of two surfactants: sodium dodecylsulphate (SDS) and polyoxyethylene (23) lauryl ether (PEO 23). The partition coefficient of barbitone decreases when mixed micelles are formed. The effective composition of the mixed micelles is calculated from critical micelle concentration data obtained from surface-tension measurements, using the model of regular solutions. It is shown that small quantities of SDS in the mixed micelles have a large effect on the solubilization of butobarbitone; a larger quantity of POE 23 is needed to obtain the same results. This behaviour is interpreted in terms of interaction forces between the three components of the solution at the micellar surface. Inorganic salts such as Na 2 SO 4 and MgSO 4 also decrease the partition coefficient of butobarbitone in POE 23 solutions. In the former case, the variation is a linear function of the mixed electrolyte/POE 23 mole fraction. In the latter case, a larger decrease is observed that is due to the interaction of the divalent ions with oxyethylene groups at the micellar surface.


Journal of Colloid and Interface Science | 1982

Characterization of mixed nonionic surfactant micelles by photon correlation spectroscopy and viscosity

A. Al‐Saden; A. T. Florence; T.L. Whateley; F. Puisieux; C. Vaution

Abstract Mixed micelles of the nonionic surfactants Brij 92 and Brij 96 were shown to be large and asymmetric. Using the relationship between the radius of gyration (from total intensity light-scattering dissymmetry measurements) and the hydrodynamic radius (from photon correlation spectroscopy) the mixed micelles are shown to have a rod-like structure, the length of which increases with temperature and on addition of salt. These rod-like micelles appear to exhibit considerable flexibility which is responsible for their measured viscosities being less than that expected from their asymmetry.


Journal of Colloid and Interface Science | 1979

Surface activity and association of ABA polyoxyethylene—polyoxypropylene block copolymers in aqueous solution

Krishna N Prasad; Tran Thuy Luong; Alexander T FlorenceJoelle Paris; C. Vaution; M. Seiller; F. Puisieux


Langmuir | 1990

Micellar solubilization in strongly interacting binary surfactant systems

Claude Treiner; M. Nortz; C. Vaution


Journal of Colloid and Interface Science | 1988

Micellar solubilization in aqueous binary surfactant systems: Barbituric acids in mixed anionic + nonionic or cationic + nonionic mixtures

Claude Treiner; M Nortz; C. Vaution; F. Puisieux


Journal of Colloid and Interface Science | 1996

Coadsorption of Steroids and Nonionic Surfactants on Polystyrene Latex Particles from Aqueous Solutions

J. Jansen; Claude Treiner; C. Vaution


Journal of Pharmaceutical Sciences | 1981

Solubility behavior of barbituric acids in aqueous solution of sodium alkyl sulfonate as a function of concentration and temperature

C. Vaution; Claude Treiner; F. Puisieux; J.T. Carstensen


Cosmetics and toiletries | 1991

Environmental regulation of small manufacturing facilities : surviving the environmental decade

C. Prybilski; M. De Luca; Jean-Louis Grossiord; C. Vaution


S.T.P. pharma | 1988

Classification et obtention des émulsions multiples

M. De Luca; C. Vaution; A. Rabarron; M. Seiller


International Journal of Cosmetic Science | 1991

Les ?mulsions multiples

Maria Augusta de Luca; Pedro Alves da Rocha-Filho; J. Louis Grossiord; Alain Rabaron; C. Vaution; Monique Seiller

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A. Al‐Saden

University of Strathclyde

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A. T. Florence

University of Strathclyde

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