TITLE

Surfactant film bending elasticity in microemulsions: Structure and droplet polydispersity

AUTHOR(S)
Sicoli, F.; Langevin, D.; Lee, L. T.
PUB. DATE
September 1993
SOURCE
Journal of Chemical Physics;9/15/1993, Vol. 99 Issue 6, p4759
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The surfactant film bending elasticity can be described by a spontaneous curvature C0 and two elastic constants K and K associated with the mean curvature and the Gaussian curvature, respectively. These parameters are very important in the determination of the structure of the dispersions stabilized by the surfactant (droplets or sponge-like structures). We have studied ternary mixtures of oil, water, and nonionic surfactants of different chain lengths. Depending on the temperature, the microemulsions are in equilibrium with excess oil (o/w structure), excess water (w/o), or both excess oil and water (bicontinuous). We present neutron scattering data from which we determine the microemulsion structure and, in the case of droplet structures, of the droplet polydispersity. These results, in combination with those from earlier experiments using ellipsometry, are used to estimate K.
ACCESSION #
7650158

 

Related Articles

  • Effect of sodium dodecyl sulfate on dynamic surface properties of lysozyme solutions. Noskov, B.; Tikhonov, M. // Colloid Journal;Apr2012, Vol. 74 Issue 2, p248 

    The surface dilatation rheological properties of lysozyme/sodium dodecyl sulfate (SDS) mixed solutions are studied by the oscillating ring method. At the initial stage of adsorption, the rate of variations in the surface properties depends nonmonotonically on SDS concentration due to the...

  • Comments on 'Influence of Soluble Surfactant Properties on the Activation of Aerosol Particles Containing Inorganic Solute.' Facchini, Maria Cristina; Mircea, Mihaela; Fuzzi, Sandro // Journal of the Atmospheric Sciences;6/1/2001, Vol. 58 Issue 11, p1465 

    Comments on the study regarding the influence of soluble surfactant properties on the activation of aerosol particles which contain inorganic solute. Analysis of the results of the study; Factors that influence the soluble surfactant properties.

  • The degree of dissociation of ionic surfactant shells within a W/O microdroplet. Tsao, Heng-Kwong; Heng-Kwong Tsao; Sheng, Yu-Jane; Yu-Jane Sheng; Lu, C.-Y. David // Journal of Chemical Physics;12/8/2000, Vol. 113 Issue 22 

    The degree of dissociation of ionic surfactant shells within a W/O microdroplet is investigated on the basis of the Poisson-Boltzmann equation and locally ideal mixing assumption. The degree of dissociation is the result of the competition between the entropy associated with counterions in the...

  • Concentrations of Monomers and Cylindrical Micelles above the Second CMC. Kuni, F. M.; Shchekin, A. K.; Rusanov, A. I.; Grinin, A. P. // Colloid Journal;Mar/Apr2004, Vol. 66 Issue 2, p174 

    Based on thermodynamically substantiated linear dependence of the work of cylindrical micelle formation on the aggregation number within a wide range of aggregation numbers where the cylindrical micelles are accumulated in a surfactant solution, the second critical micellization concentration...

  • Peroxidase-like activity of cytochrome c in the presence of anionic surfactants. Gebicka, Lidia // Research on Chemical Intermediates;2001, Vol. 27 Issue 7/8, p717 

    Peroxidase-like activity of cytochrome c is significantly higher in the presence of anionic surfactants, sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and sodium n-dodecyl sulphate (SDS). The enhancement is due to the higher reaction rate of the cytochrome c with H[sub 2]O[sub 2], which is the...

  • Phase diagram in a lattice model of surfactant solutions. Ciach, A. // Journal of Chemical Physics;10/1/1990, Vol. 93 Issue 7, p5322 

    Phase diagrams and correlation function of three-component mixtures containing amphiphilic particles are calculated from a model introduced previously within mean-field approximation. The phase diagram depends on interparticle interactions, and agrees qualitatively with experiment already in the...

  • Influence of restricted environment and ionic interactions on water solvation dynamics. Pant, Debi; Riter, Ruth E. // Journal of Chemical Physics;12/8/1998, Vol. 109 Issue 22, p9995 

    Examines the polar solvation dynamics of water sequestered inside Aerosol OT reverse micelles as a function of the surfactant countercation. Solvation dynamic in strongly ionic aqueous solutions; Observations on the water motion in ten M electrolyte solutions; Role of micellar interfacial...

  • Sphere-to-rod transitions of micelles in model nonionic surfactant solutions. Al-Anber, Zaid A.; Bonet i Avalos, Josep; Floriano, M. Antonio; Mackie, Allan D. // Journal of Chemical Physics;2/22/2003, Vol. 118 Issue 8, p3816 

    The transition of spherical to rod-like micelles is studied in a lattice model for amphiphiles using the single chain mean-field (SCMF) theory and grand-canonical Monte Carlo (GCMC) simulations. A linear combination of the free energy of spherical and infinite cylindrical geometries is assumed...

  • Complexes of polyelectrolytes and oppositely charged ionic surfactants. von Ferber, C.; Löwen, H. // Journal of Chemical Physics;6/15/2003, Vol. 118 Issue 23, p10774 

    Complex formation between a single polyelectrolyte chain and ionic surfactant molecules is studied by computer simulation of a “primitive” electrolyte model with explicit charges. The surfactant head carries a charge opposite to that of the polyelectrolyte. The neutral flexible tail...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics