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Wetting of low free energy surfaces by aqueous surfactant solutions

journal contribution
posted on 08.12.2011 by Natalia A. Ivanova, Victor Starov
Surfactant-enhanced spreading of water-based formulations over low-energy surfaces has attracted considerable interest in scientific and industrial communities because of its importance in agrichemical, pharmaceutical, coating and textile applications. Spreading of aqueous surfactant solutions is rather complex process than spreading of pure liquids due to a time-dependent adsorption/desorption of surfactant molecules at all three interfaces involved that results in changing the interfacial energy balance, producing interfacial tension gradients and, hence, Marangoni flows. The phase behavior and structures of surfactant aggregates in bulk solutions, structure and surface activity of surfactant molecule itself, physicochemical properties of substrates and a number of other parameters could strongly influence spreading dynamic of surfactant solutions on hydrophobic surfaces. Implication of all those factors on spreading behavior of solutions makes it hardly predictable from both theoretical and practical points of view. In this brief review we summarize different factors that determine spreading character of aqueous surfactant solutions on hydrophobic substrates such as polymers films and chemically modified solids. Focus is made on spreading and wetting behavior of nonionic hydrocarbon and organosilicone surfactants, which are widely used in commercial and analytical applications.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

CURR OPIN COLLOID IN

Volume

16

Issue

4

Pages

285 - 291

Citation

IVANOVA, N.A. and STAROV, V., 2011. Wetting of low free energy surfaces by aqueous surfactant solutions. Current Opinion in Colloid & Interface Science, 16(4), pp. 285-291

Publisher

© Elsevier

Version

NA (Not Applicable or Unknown)

Publication date

2011

ISSN

1359-0294

Language

en

Exports