Interfacial Films Between Benzene and Solutions of Salts of Arabic Acid

Abstract

The interfacial tension between benzene and acacia, arabic acid and its salts falls rapidly for about eight hours and then more slowly. The effect on the interfacial tension is similar with the soluble salts of both monovalent and divalent metals. A tenacious film is formed in a few seconds and continues to increase in thickness with time. The evidence suggests that the film eventually formed is a substantial multilayer with many of the properties of an elastic solid. A film of this kind would account for the stability of acacia emulsions.