Turbidity Tweens

The preparation and physical properties of oil/water microemulsions containing liquid paraffin, glycerol, water and blends of Tween 60 and Span 80 have been examined [180]. The decrease in micellar size as the surfactant/alcohol ratio was increased is similar to the situation observed with solubilized micellar solutions formed by non-ionic surfactants. Turbidity spectra methods of particle sizing have shown that an increase of temperature of preparation over the range 25 to 80° C led to a gradual decrease in the modal diameter and the half-width of the size distribution curve. Phase diagram studies on micellar solutions prepared at 70° C have indicated a pronounced dependence of the area of existence of microemulsions on the ratio of Tween to Span in the system and on the oil... 

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