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Dynamic surface tension in concentrated solutions of CnEm Surfactants: A comparison between the theory and experiment
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2000 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 16, 2557-2565 p.Article in journal (Refereed)
Abstract [en]

Dynamic surface tension (DST) measurements have been carried out with a series of CnE6-type surfactants with varying alkyl chain length (n = 10 to 16). Major emphasis has been placed on the DST relaxation in complex solutions containing both the micellar and monomer forms of surfactant. This paper also provides a step-by-step guidance to the theoretical interpretation of DST data for micellar solutions. Distributions of monomers and micelles in the vicinity of the gas/liquid interface, adsorption kinetics, and DST relaxation curves have been simulated in the framework of the Fainerman theory (Fainerman, V.B. Kolloid. Zhur. 1981, 43, 94) explicitly allowing for monomer/micelle interconversation. A thorough numerical analysis has shown that although the Fainerman theory can follow the general experimental trends, it clearly lacks the flexibility needed to provide a self-consistent and quantitatively-correct description of the process. Possible reasons for this disagreement are discussed.

Place, publisher, year, edition, pages
2000. Vol. 16, 2557-2565 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27222OAI: oai:DiVA.org:ri-27222DiVA: diva2:1054226
Note
A1318Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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