Abstract
The change of (W/O) emulsion drop size in (W/O)/W emulsion with respect to time was measured in a stirred tank. The effects of various factors on the Sauter mean diameter d32 of the (W/O) emulsion drops and its variation with time were investigated. They are affected by the kind of surfactant, the presence of carrier and the solute permeation in addition to the stirring speed, the oil-phase viscosity and the composition of inner water phase. The value of d32 can be correlated with a dimensionless group containing the Weber number for each surfactant, i.e., Span 80 and ECA 4360J.
