The kinetics of adsorption of surface-active compounds to liquid interfaces plays an important role in many process including printing, coating, spraying, wetting and foaming. For simple surfactants, the adsorption processes are usually categorised as diffusion control, kinetic control or a mixed mechanism in which both diffusion and the local transfer from sub-surface to surface determine the adsorption rate. In complex fluids containing aggregates of surfactants, such as micelles or vesicles, or complexes of surfactants with each other or with polymers, the adsorption kinetics depend also on the composition and transport properties of the aggregates in the bulk phase and the rates of interchange between aggregates and monomers. In addition, there is the possibility of micelles or complexes adsorbing directly to the liquid surface, which then promotes the disintegration of the aggregate. This talk will present experimental data on the kinetics of adsorption of micellar solutions (of pure and mixed surfactants) and of polymer-surfactant mixtures to the air-water interface, principally in an overflowing cylinder. Simple theoretical models will be described that explain some features of the experimental data and outstanding questions will discussed. Areas for future theoretical development will be outlined.�Adsorption Kinetics of Nonionic Surfactants in Micellar Solutions: Effects of Added Charge� Yan, C.; Angus-Smyth, A.; Bain, C. D. Faraday Discussions 2013 , 160, 45�Effects of Bulk Aggregation on PEI/SDS Monolayers at the Dynamic Air/Liquid Interface: Depletion due to Precipitation versus Enrichment by a Convection/Spreading Mechanism� Angus-Smyth, A.; Bain, C. D.; Varga, I.; Campbell, R. A. Soft Matter, 2013,  9, 6103

Adsorption kinetics of complex fluids at liquid surfaces

248th National Meeting (2014)

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