Dynamic interfacial tension of triblock copolymers solutions at the water-hexane interface

作者：Ramirez P^*; Munoz J; Fainerman V B; Aksenenko E V; Mucic N; Miller R

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2011, 391(1-3): 119-124.

DOI：10.1016/j.colsurfa.2011.04.019

• Pluronics
• Adsorption isotherm
• Adsorption kinetics
• Water-hexane interface
• Multilayer formation

Equilibrium and dynamic surface tension of non-ionic triblock copolymers, Pluronics, varying in the number of poly(ethylene oxide) and poly(propylene oxide) groups have been measured by means of drop profile tensiometry at the water-hexane interface.
The experimental data have been explained on the basis of a theory previously developed for protein solutions [1]. This model assumes the coexistence of different adsorbed states at the interface, depending on the surface coverage. It has been shown that the best fit is achieved when a polylayer adsorption is considered. Reasonable values of the adsorption layer thickness and realistic values of the diffusion coefficient are obtained which validate the model proposed.

• 出版日期2011-11-5