Nonionic Microemulsion: Mechanism of Formation and Percolation

Naouli, Nabil; Rosano, Henri L.

doi:10.1080/01932690802548387

Cited by 4 publications

(1 citation statement)

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“…“Hopping” and “transient fusion-mass transfer-fission” are the two mechanisms, which have been proposed and widely explained in the literature to describe the occurrence of conductance percolation in various w/o microemulsion systems. − The predicted functions of the electrical conductivity (σ) and its logarithm (log (σ)) for the studied microemulsion system were obtained from the final statistical model in eq . These functions are shown against the water content (ϕ) in Figure .…”

Section: Resultsmentioning

confidence: 99%

Prediction of Water Percolation Threshold of a Microemulsion Using Electrical Conductivity Measurements and Design of Experiments

Jeirani

Jan

Ali

et al. 2012

Ind. Eng. Chem. Res.

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This paper presents the estimation of water percolation threshold (ϕ c ) of a nonionic microemulsion by studying its conductivity (σ) as a function of water volume fraction (ϕ). The initial solution of alkyl polyglycosides/glyceryl monooleate/ n-octane/isopropyl alcohol with weight ratios of 3/3/2/2 was diluted by brine (1 wt % sodium chroride), and the electrical conductance was measured along the specific dilution line. One factor design (OFD), which is an approach embedded in Design of Experiments (DOE), was used to model the variation of d(logσ)/dϕ with ϕ. A quadratic equation with natural logarithm transformation was then fitted and validated. The model was optimized to predict ϕ c , the water volume fraction at which d(logσ)/dϕ is a maximum. The predicted value of ϕ c from the optimization of the model is 0.1245. In addition, fitting to the scaling law was conducted, and the value of ϕ c from this theoretical model was 0.1212. Apparently, these values are in excellent agreement. It is concluded that DOE can be used to estimate the value of ϕ c for a microemulsion relatively precisely with less computation and restriction compared to the conventional fitting approach.

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