Dynamic surface elasticity of surfactant solutions

A survey of the earlier results of analytical investigation of the dilational surface viscoelasticity of surfactant solutions by means of methods of non-equilibrium thermodynamics is presented. The case of an arbitrary number of surfactants and mixed adsorption kinetics is considered for liquid–gas and liquid–liquid interfaces only at low surface coverages. Analytical study of the surface viscoelasticity at arbitrary surface coverages is possible when additional restrictions are made. Special attention is paid to the surface viscoelasticity of a system with a non-equilibrium non-perturbed state. The results for the latter system allow us to study the linear stability of longitudinal surface waves.