Surface Pressure
surface pressure
[′sər·fəs ‚presh·ər]Surface Pressure
a force acting on a unit of length of the barrier separating the pure surface of a liquid and the surface of the same liquid covered with an adsorption layer of a surfactant. Surface pressure has a molecular kinetic nature; it is directed toward the pure surface and is determined by the difference in surface tensions of the pure liquid and of the liquid with an adsorption monolayer.