Adsorption of styrene at a binary solution-gas interface

作者：Fedorova A A^*; Ulitin M V

来源：Russian Journal of Physical Chemistry, 2011, 85(10): 1810-1813.

DOI：10.1134/S0036024411100050

• surface tension
• styrene
• adsorption
• isotherms
• liquid-gas interface
• thermodynamics
• model of molecular adsorption
• solutions
• 2-propanol-water
• solvation

The surface tension isotherms of styrene solutions in 2-propanol-water solvents are obtained experimentally. Isotherms of excess and absolute adsorption at the liquid-gas interfaces are also obtained. A thermodynamic model for the adsorption of styrene from 2-propanol-water binary solvent at the solutiongas interfaces is proposed on the basis of the stoichiometric approach. The isosteric adsorption heats are calculated using the experimental isotherms of surface tension and excess adsorption of styrene from 2-propanol-water binary solvent, and it is shown that the formation of the surface layer occurs according to a mechanism combining the processes of displacement adsorption between molecules of the components of the solvent, styrene, and 2-propanol.

• 出版日期2011-10
• 单位北京化工大学