Percolation Behavior in W/O Emulsions Stabilized by Interfacially Active Fractions from Crude Oils in High External Electric Fields

✍ Scribed by Harald FØrdedal; Johan Sjöblom

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 129 KB
• Volume: 181
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0416

✦ Synopsis

simulations have been performed where the conduction In this communication we report on a percolation behavior of mechanism of the microemulsion includes two contributions, water in oil emulsions stabilized by indigenous surfactants from a charge transport via diffusing nanodroplets and a charge crude oils in high external electric fields. The static permittivity exchange mechanism between neighboring nanodroplets, of the emulsion investigated increases with the applied electric which may belong to a neighboring nanocluster (11).

field. When the electric field reaches a certain strength the system

In a w/o microemulsion stabilized by an ionic surfactant, collapses and the permittivity of the system resembles that of a the droplets acquire charges from the exchange of charged series coupling of the water and the oil domains. Regression analysurfactant heads at the droplet interface and the oppositely sis of a proposed scaling law shows that the system behaves accharged counterions in the droplet interior. The conductivity cording to a static percolation model, i.e., a bicontinuous system.

We compare the percolation behavior in high electric fields to that is then proportional to the volume fraction F and the temperreported in temperature and conductivity studies in w/o microature T: emulsions.