Dynamic Surface Tensions of Nonionic Surfactant Solutions

The Influence of pH and Temperature on the Equilibrium and Dynamic Surface Tension of Aqueous Solutions of Sodium Oleate

“…The result was in general agreement with other DST experiments reported in the literature (24), which suggests that the process of diffusion to the surface layer is an important mechanism but probably only over the longer time intervals. Nevertheless, D eff values were derived at a series of different temperatures and concentrations from the slopes of the plots using the longer time scale data.…”

“…In fact, in previous studies (24,25) with nonionic and ionic surfactants it was found that D eff values determined by this method were lower than D values determined by NMR. This difference was explained on the basis of an adsorption energy barrier.…”

Adsorption Properties of Novel Gemini Surfactants with Nonidentical Head Groups

“…The ratio between the experimental and the calculated gradient is higher than unity. This could suggest a presence of an adsorption barrier as was also observed by Eastoe et al, for C n E m surfactants (33). Note that the length of the linear section depends on adsorption barrier height: the higher the adsorption, the smaller the length of the linear part of the decay curve.…”

Equilibrium Surface Tension, Dynamic Surface Tension, and Micellization Properties of Lactobionamide-Type Sugar-Based Gemini Surfactants

“…We attributed this trend to the adsorption of the surfactant from the subsurface to the interface. Additionally, the diffusion coefficient obtained via short-time behavior was higher than that via long-time behavior because of the uncertainty in the surface excess concentration obtained from equilibrium surface tension measurements and the presence of an adsorption barrier, as suggested by Eastoe et al 27 .…”