Adsorption kinetics of micellar Brij 58 solutions

Equilibrium and dynamic surface properties of trisiloxane aqueous solutions. Part 2. Theory and comparison with experiment

“…(20) can also be used for calculations of dynamic surface tension on time for concentrated solutions of trisiloxane surfactants (concentrations above CAC or even CWC) if combined with the theory developed by Joos [26,27]. The theory still assumes that only monomers adsorb at the interface.…”

“…However, above CAC the monomers at the subsurface have two origins: on one side the diffusion of monomers from bulk, and on the other side the diffusion of aggregates from bulk to the subsurface where they disintegrate because the monomer concentration is lower than the CAC. Assuming that the disintegration process of the bulk aggregates is comparatively fast, it is possible to describe the adsorption of monomers at the air/liquid interface as a single effective process which an effective diffusion coefficient D* of monomers given by [26,27]: Feinerman et al to describe the surface behavior of SDS solutions [28].…”

Dynamic Surface Tension and Adsorption Kinetics from Micellar Solutions on Planar Surfaces

“…since D m Ӷ D 1 , a ӷ 1. If x D ӷ 1 then the adsorption process for long times is governed by the diffusion of micelles, since Figure 3 shows the time dependence of the relative dynamic surface tension in the form of the relaxation func- F[g(t)], versus log(time) for a micellar Brij 58 solution (6).…”

“…[6] and boundary (x r ϱ) Eq. [7] condiand Micelles on Planar Surface tions In the general case the adsorption kinetics for monomers c 1 (x ú 0, 0) Å c o1 , c m (x ú 0, 0) Å c om , and micelles on a planar surface is described by (12-14)…”

Linear Compression of a Mixed Adsorbed Monolayer

“…, (even for a growing drop) (4,5), (ii) to describe the surface tension variation during expansion and compression of a surface with a constant dilatation rate (2, 6), and (iii) to…”