Dynamic surface tensions of micellar Triton X-100 solutions

Auto-production of biosurfactants reverses the coffee ring effect in a bacterial system

“…S3). This calculated time to saturate an initial clean interface upon addition of surfactant supports the idea that it is the process of diffusion, rather than demicellization and adsorption–desorption kinetics of the surfactant, which is crucial for the observed periodic behaviour22232430.…”

“…However, the complex interplay between the discussed flows within the droplet changes the concentration of the surfactant at the interface over time, for which the dynamic surface tension is the property to evaluate. To investigate if this dynamic surface tension is of the correct order of magnitude, an oscillating pendant drop module2021222324 was used. The response to a step change in interfacial area was probed on a system that was geometrically equivalent to the evaporating droplets.…”

Small-Molecule Surfactant Adsorption, Polymer Surfactant Adsorption, and Surface Solubilization: An Overview

“…At surfactant concentration below the CMC, adsorption kinetics follow a simple diffusion model (81)(82)(83). However, at surfactant concentration above the CMC, an additional complications because of the rate at which micelles dissociate is introduced (84)(85)(86)(87). Other complications include electrostatic interactions, orientation effects, and mixed surfactant-macromolecule systems (83,86).…”

“…Almost invariably, adsorption kinetics has been measured by monitoring surface tension as a function of time and surface rheology at different rates of surface perturbation. Methods such as oscillating jets, ring and plate techniques, meniscus shapes, drop volume, surface potential, surface relaxation, surface quasi-elastic light scattering, and the bubble pressure method have been used to obtain adsorption kinetics (83, [87][88][89][90][91][92]. Recently, in situ ellipsometry has been used to study adsorptiondesorption kinetics of nonionic polyethylene glycol monoethers at the silica-water interface (93).…”

Influence of electrolytes on the dynamic surface tension of ionic surfactant solutions: Expanding and immobile interfaces

“…This dynamic regime is realized by the fast-formed-drop method [52,53] and the inclined plate method [31,54,55]. The interface is disturbed only in the initial moment, t = 0.…”