Effect of micellar collisions and polyvinylpyrrolidone confinement on the electrical conductivity percolation parameters of water/AOT/isooctane reverse micelles

The main aim of this paper is the analysis of micellar collisions and polymer confinement effects on the electrical conductivity percolative behavior of water/sodium bis(2-ethylhexyl) sulfosuccinate (AOT)/isooctane reverse micelles. Firstly, we have performed conductance measurements of the system f...

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Bibliographic Details
Published in:Journal of molecular structure 2017-12, Vol.1149, p.712-719
Main Authors: Guettari, Moez, Aferni, Ahmed E.L., Tajouri, Tahar
Format: Article
Language:English
Subjects:
Activation energy
Critical exponents
Electrical conductivity
Micellar collisions
Percolation
Polymer confinement
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Summary:The main aim of this paper is the analysis of micellar collisions and polymer confinement effects on the electrical conductivity percolative behavior of water/sodium bis(2-ethylhexyl) sulfosuccinate (AOT)/isooctane reverse micelles. Firstly, we have performed conductance measurements of the system for three AOT to isooctane volume ratio, φm=0.1,0.15 and 0.2 to examine the influence of micellar collisions on the percolation parameters. All the measurements were carried out over the 298.15 K–333.15 K temperature range at a fixed water to AOT molar ratio, W0=45. We have assessed that the rise of micellar collisions frequency enhances the conductance percolation. Secondly, the confinement effect of a water-soluble polymer, polyvinylpyrrolidone (PVP), on the reverse micelles conductance behavior was investigated. Temperature-induced percolation, Tp, have shown a dependence on the polymer concentration, CPVP. It was also observed that for various PVP concentrations, the activation energy of percolation decreases. Finally, the values of the critical exponents determined in the presence and absence of PVP prove that the polymer affects the dynamic of percolation. [Display omitted] •The enhance of reverse micelles collision expedite the conductivity percolation.•The rise of collision frequency causes the decrease of the activation energy.•The percolation model depends on the micelles collision.•Polyvinylpyrrolidone affects the percolation threshold and the activation energy.•The PVP confinement influence on the percolation dynamic.
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2017.08.026