P. Elworthy, A. Florence, J. Rogers
1971
Citations
0
Influential Citations
18
Citations
Journal
Journal of Colloid and Interface Science
Abstract
Abstract The effect of n -hexadecanol on the stability of chlorobenzene-in-water emulsions stabilized by a nonionic detergent, C 16 H 33 (OCH 2 CH 2 ) 6 OH, has been determined. Interfacial tension and interfacial viscosity measurements have been carried out at planar chlorobenzene-water interfaces in the presence of these agents. There appears to be evidence of complex formation at the interface, as hexadecanol increases the viscosity of monolayers of the detergent. Although hexadecanol can increase stability against coalescence fivefold, the alcohol has little effect on the zeta potential of the oil droplets in the presence of the nonionic detergent and decreases the interfacial tension of the system by only a small amount. It is suggested that with the increased interfacial viscosity there is less likelihood of surfactant movement away from the point of contact, or of droplet deformation during collisions, and that this leads to enhanced stability.