TU Darmstadt / ULB / TUprints

Thermodynamics, Kinetics and Dilational Visco-Elasticity of Adsorbed CnEOm Layers at the Aqueous Solution/Air Interface

Fainerman, Valentin B. ; Kovalchuk, Volodymyr I. ; Aksenenko, Eugene V. ; Ravera, Francesca ; Liggieri, Libero ; Loglio, Giuseppe ; Makievski, Alexander V. ; Schneck, Emanuel ; Miller, Reinhard (2022)
Thermodynamics, Kinetics and Dilational Visco-Elasticity of Adsorbed CnEOm Layers at the Aqueous Solution/Air Interface.
In: Colloids and Interfaces, 2022, 5 (1)
doi: 10.26083/tuprints-00019610
Article, Secondary publication, Publisher's Version

[img]
Preview
Text
colloids-05-00016-v2.pdf
Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

Download (6MB) | Preview
Item Type: Article
Type of entry: Secondary publication
Title: Thermodynamics, Kinetics and Dilational Visco-Elasticity of Adsorbed CnEOm Layers at the Aqueous Solution/Air Interface
Language: English
Date: 2 February 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Colloids and Interfaces
Volume of the journal: 5
Issue Number: 1
Collation: 16 Seiten
DOI: 10.26083/tuprints-00019610
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

The adsorption behaviour of linear poly(oxyethylene) alkyl ether (CnEOm) is best described by a reorientation model. Based on a complete set of experimental data, including the adsorption kinetics, the equilibrium surface tension isotherm and the surface dilational visco-elasticity, the thermodynamic and kinetic adsorption parameters for some CnEOm at the water/air interface were determined. For the study, six CnEOm surfactants were selected (n = 10, 12 and 14 and m = 4, 5 and 8) and were studied by bubble profile analysis and maximum bubble pressure tensiometry. A refined theoretical model based on a reorientation-adsorption model combined with a diffusion-controlled adsorption kinetics and exchange of matter allowed us to calculate the surface layer composition by adsorbing molecules in different orientations. It turns out that at larger surface coverage, the adsorption rate decreases, i.e., the apparent diffusion coefficients are smaller. This deceleration can be explained by the transition of molecules adsorbed in a state of larger molar surface area into a state with smaller molar surface area.

Uncontrolled Keywords: poly(oxyethylene) alkyl ether, adsorption kinetics, surface tension isotherm, dilational surface visco-elasticity, diffusion-controlled adsorption, reorientation model
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-196106
Classification DDC: 500 Science and mathematics > 500 Science
500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics
Date Deposited: 02 Feb 2022 13:27
Last Modified: 14 Nov 2023 19:04
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19610
PPN: 505625547
Export:
Actions (login required)
View Item View Item