Abstract
The adsorption of poly( N-vinylcaprolactam/ N-vinylpyrrolidone/ N, N-dimethylaminoethyl methacrylate), a commercial product with the trade name of Gaffix ® VC-713 and currently used as a kinetic inhibitor for natural gas hydrates, has been experimentally studied at the air–liquid interface using surface tension measurements. The influence of polymer concentration and temperature on the adsorption of the polymer was analysed. The equilibrium experimental data obtained at both 293 K and 278 K has been fitted using the analogous surface equation of state for the Langmuir isotherm. Dynamic adsorption has been modelled using both diffusion-controlled and asymptotic models. The values of the surface tension and the surface excess at saturation showed that the polymer was very active at the air–liquid interface. Equilibrium surface tension indicated that temperature has a weak influence on the number of moles of Gaffix ® VC-713 adsorbed on the interface. The dynamic adsorption was controlled by diffusion process initially, in which a rapid reduction in surface tension was observed. It was then followed by a slow polymer reorganization process. A strong dependence of the dynamic adsorption on both the temperature and the polymer concentrations was well demonstrated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
