The influence of dispersed phase volume and particle size distribution on the rheology of oil-in-oil emulsions.

The effects of dispersed phase volume and particle size distribution on the rheology of oil-in-oil emulsions (nonaqueous systems) prepared with monochlorobenzene and ethylene glycol as disperse and continuous phases and polyoxyethylene sorbitan monooleate as emulsifier, have been studied. Experimental viscosity data obtained for nonaqueous emulsions appeared to fit the general equation ηrel=exp (aφ/1−kφ). The values of constant a have been found to be below the value of 2.5 for solid spheres and the hydrodynamic interaction coefficient k decreases with an increase in mean particle size. [ABSTRACT FROM AUTHOR]