NDLI: Adsorption of C<sub>14</sub>EO<sub>8</sub> at the interface between its aqueous solution drop and air saturated by different alkanes vapor

Content Provider	Royal Society of Chemistry (RSC)
Author	Miller, R. Aksenenko, E. V. Fainerman, V. B. Kovalchuk, V. I.
Copyright Year	2017
Abstract	The dynamic and equilibrium surface tension for drops of aqueous C14EO8 solutions at the interface to pure air or pentane, hexane, heptane and toluene saturated air, and the dynamic surface tension of pure water at these interfaces are presented. Two theoretical models were employed: both assuming a diffusion controlled adsorption of the surfactant, and either a diffusion or kinetic barrier governed adsorption of the alkanes. The experimental results are best described by the model which implies a diffusion control for the C14EO8 molecules and the existence of a kinetic barrier for the alkane molecules. The desorption of alkanes from the surface layer after equilibration and their subsequent removal from the measuring cell was studied as well. The desorption process was shown to be slow for heptane and hexane. However, for the pentane vapor the desorption is quite rapid, and after the desorption commences the surface tension becomes equal to that at the interface with pure air.
Starting Page	2193
Ending Page	2200
Page Count	8
File Format	HTM / HTML PDF
ISSN	14639076
Volume Number	19
Issue Number	3
Journal	Physical Chemistry Chemical Physics
DOI	10.1039/c6cp07705f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Adsorption Toluene Hexane Surface tension Pure Air Diffusion Surfactant Pentane Heptane
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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