Abstract
AbstractA computer‐based method is described for the determination of the interfacial tension between pendant and sessile drops in a surrounding continuous phase. This has been used to determine the effect on interfacial tension of increasing amounts of aliphatic alcohols, from methanol up to n‐octanol, equilibrated between a hydrocarbon solvent (Shellsol) and water. The results indicated large decreases in interfacial tension, with n‐butanol, followed by n‐propanol giving the greatest reduction. Measurements were also made of the rate of change of interfacial tension during the mass transfer of 2.5% of the alcohols between phases. Changes were observed for all alcohols from ethanol to n‐pentanol, the effect being greatest for transfer into water drops and out of solvent drops. Application of the linear stability theory of Sørensen to these results failed to predict the observed instability for transfer into solvent drops.
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