Technical Physics Letters
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Investigation of the interfacial tension at the interface between water and asphaltene solution in toluene
Zinnatullin R. R.
1, Iskandarov A.I.1, Kovaleva L.A.
1
1Bashkir State University, Ufa, Russia
Email: rasulz@yandex.ru, iskandarov999@mail.ru, liana-kovaleva@yandex.ru
The dynamics of the interfacial tension coefficient at the interface between water and model solutions of asphaltenes of different concentrations in toluene has been studied. It has been shown that, over time, the interfacial tension decreases due to the adsorption of asphaltene molecules at the interface. With an increase in the concentration of asphaltenes in the solution, the decrease in interfacial tension occurs more intensively. The results of a study of the elongation of a water drop in a solution under the influence of an electric field are presented. It is shown that after the formation of an adsorption film, a higher electric field must be applied to stretch the droplet, and the relative elongation depends nonlinearly on the applied voltage. Keywords: interfacial tension coefficient, asphaltenes, adsorption film, drop elongation.
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