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Kinetics of spreading of synergetic surfactant mixtures in the case of partial wetting

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journal contribution
posted on 18.11.2016, 15:36 by Nina Kovalchuk, Faiz M. Mahdi, Victor Starov, Anna TrybalaAnna Trybala
© 2015 Elsevier B.V.Spreading kinetics of mixtures of hydrocarbon surfactant, octaethylene glycol monododecyl ether, and fluoro-surfactant, Zonyl FSN-100, on highly hydrophobic substrate was experimentally studied. The mixtures reveal a synergism in their wetting properties with equilibrium contact angle of mixtures being 15–20° lower than that of individual surfactant solutions. The synergism is due to different affinity of the surfactants to the liquid/air and liquid/solid interface. Both individual surfactants and their mixtures demonstrate power law kinetics of spreading over the time span of tens of seconds. The spreading exponent is lower than that for pure liquids, but spreading exponent of mixtures is higher than that of individual solutions. The maximum in the spreading exponent is observed for the mixtures demonstrating the lowest equilibrium contact angles. For these mixtures the spreading exponent is close to that of pure liquids.

Funding

This research was supported by Engineering and Physical Sciences Research Council, UK, grant EP/D077869/1;by CoWet Marie Curie, EU project; by European Space Agency, EVAPORATION MAP, FASES and PASTA projects; and by COST MP1106 EU project.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Volume

505

Pages

23 - 28

Citation

KOVALCHUK, N. ...et al., 2016. Kinetics of spreading of synergetic surfactant mixtures in the case of partial wetting. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 505, pp. 23-28.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

31/05/2016

Publication date

2016

Notes

This paper was accepted for publication in the journal Colloids and Surfaces A: Physicochemical and Engineering Aspects and the definitive published version is available at http://dx.doi.org/10.1016/j.colsurfa.2015.11.026

ISSN

0927-7757

eISSN

1873-4359

Language

en