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Modelling the formation of structured deposits at receding contact lines of evaporating solutions and suspensions

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posted on 17.05.2013, 13:57 authored by Lubor Frastia, Andrew ArcherAndrew Archer, Uwe Thiele
When a film of a liquid suspension of nanoparticles or a polymer solution is deposited on a surface, it may dewet from the surface and as the solvent evaporates the solute particles/polymer can be deposited on the surface in regular line patterns. In this paper we explore a hydrodynamic model for the process that is based on a long-wave approximation that predicts the deposition of irregular and regular line patterns. This is due to a self-organised pinning–depinning cycle that resembles a stick–slip motion of the contact line. We present a detailed analysis of how the line pattern properties depend on quantities such as the evaporation rate, the solute concentration, the Péclet number, the chemical potential of the ambient vapour, the disjoining pressure, and the intrinsic viscosity. The results are related to several experiments and to depinning transitions in other soft matter systems.

History

School

  • Science

Department

  • Mathematical Sciences

Citation

FRASTIA, L., ARCHER, A.J. and THIELE, U., 2012. Modelling the formation of structured deposits at receding contact lines of evaporating solutions and suspensions. Soft Matter, 8 (44), pp. 11363 - 11386.

Publisher

© Royal Society of Chemistry

Version

AM (Accepted Manuscript)

Publication date

2012

Notes

This article was published in the journal, Soft Matter [© Royal Society of Chemistry] and the definitive version is available at: http://dx.doi.org/10.1039/C2SM26574E

ISSN

1744-683X

Language

en