Time-Dependent Effects Near the Percolation Threshold in Water-in-Oil Microemulsions View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1987

AUTHORS

H.-F. Eicke , S. Geiger , R. Hilfiker , F. A. Sauer , H. Thomas

ABSTRACT

The three-component system water/surfactant(AOT)/oil(i-C8) forms in a certain range of compositions and temperatures (see Fig. 1) thermodynamically stable microemulsions consisting of nanometer-sized water droplets (ND) covered by a monomolecular layer of surfactant and dispersed in oil /1/. The nanodroplet radius is controlled by the ratio w0 = [H2O]/[AOT] and has a typical value of 10 nm. The nanodroplets are spherically symmetric and rather monodisperse, as has been established both experimentally and theoretically (see e.g. /2/). The spontaneous formation and thermodynamic stability of these emulsions is due to the “ultra-low” interfacial tension of the order of kBT/4πR2 (R = radius of spherical water droplet) of the oil/water interface in the presence of surfactant(s). This is a consequence — to a first approximation — of a compensation of Coulombic, lateral dispersion and curvature energy contributions. More... »

PAGES

219-223

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-1-4684-7476-3_21

DOI

http://dx.doi.org/10.1007/978-1-4684-7476-3_21

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016151395


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