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Title: Kinetics of spreading of synergetic surfactant mixtures in the case of partial wetting
Authors: Kovalchuk, Nina
Mahdi, Faiz M.
Starov, Victor
Trybala, Anna
Keywords: Oxiethylated alcohol C10EO8
Fluoro-surfactant Zonyl FSN-100
Sylanized glass substrate
Interfacial tension
Equilibrium contact angle
Spreading exponent
Issue Date: 2016
Publisher: © Elsevier
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.
Abstract: © 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.
Description: 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
Sponsor: 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.
Version: Accepted for publication
DOI: 10.1016/j.colsurfa.2015.11.026
URI: https://dspace.lboro.ac.uk/2134/23212
Publisher Link: http://dx.doi.org/10.1016/j.colsurfa.2015.11.026
ISSN: 0927-7757
Appears in Collections:Published Articles (Chemical Engineering)

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