G. Loglio et al., NONEQUILIBRIUM PROPERTIES OF FLUID INTERFACES - APERIODIC DIFFUSION-CONTROLLED REGIME .1. THEORY, Colloids and surfaces. A, Physicochemical and engineering aspects, 90(2-3), 1994, pp. 251-259
Surface relaxation processes of liquid solutions, under not-far-from-e
quilibrium conditions, are interpreted from a phenomenological point o
f view by application of the theory of distributed systems. In the cas
e of diffusion-controlled adsorption, exact analytical expressions des
cribe the transient responses of bulk concentration and dynamic surfac
e tension, consequent to trapezoidal pulses of relative surface area.
The mathematical treatment shows that surface responses have a definit
e physical significance, as they manifest a constitutive property of t
he system, i.e. the surface dilational modulus.