Dynamic surface elasticity of surfactant solutions

A survey of the earlier results of analytical investigation of the dilation al surface viscoelasticity of surfactant solutions by means of methods of n on-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 stud y of the surface viscoelasticity at arbitrary surface coverages is possible when additional restrictions are made. Special attention is paid to the su rface viscoelasticity of a system with a non-equilibrium nonperturbed state . The results for the latter system allow us to study the linear stability of longitudinal surface waves. (C) 1998 Elsevier Science B.V. All rights re served.