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Static and dynamic wetting of soft substrates

Chen, Longquan and Bonaccurso, Elmar and Gambaryan-Roisman, Tatiana and Starov, Victor and Koursari, Nektaria and Zhao, Yapu (2018):
Static and dynamic wetting of soft substrates.
In: Current Opinion in Colloid & Interface Science, pp. 46 - 57, 36, ISSN 1359-0294,
DOI: 10.1016/j.cocis.2017.12.001,
[Online-Edition: https://doi.org/10.1016/j.cocis.2017.12.001],
[Article]

Abstract

A survey of recent literature on wetting phenomena reveals that there is a fast-growing interest in wetting of soft or deformable substrates, due to its potential applications in many industrial, technical and biological processes. Unlike rigid substrates, a droplet deposited on a soft substrate deforms the substrate via a combination of the normal component of surface tension and the Laplace pressure, i.e. by capillary force and the action of disjoining pressure. In turn, the capillary and disjoining pressure-induced substrate deformation affects the wetting phenomena on the substrate. In this review, we summarize recent achievements on static and dynamic wetting of soft substrates and provide an outlook to future progress. In static wetting, theoretical, numerical and experimental investigations of capillary and disjoining pressure-induced substrate deformation are introduced, and corresponding effects on contact angle and contact angle hysteresis are discussed. In dynamic wetting, the influence of substrate stiffness on spontaneous wetting, droplet impact dynamics, and other types of forced wetting and dewetting is considered. Finally, other interesting capillarity-controlled phenomena occurring on soft and soft-like substrates are briefly introduced.

Item Type: Article
Erschienen: 2018
Creators: Chen, Longquan and Bonaccurso, Elmar and Gambaryan-Roisman, Tatiana and Starov, Victor and Koursari, Nektaria and Zhao, Yapu
Title: Static and dynamic wetting of soft substrates
Language: German
Abstract:

A survey of recent literature on wetting phenomena reveals that there is a fast-growing interest in wetting of soft or deformable substrates, due to its potential applications in many industrial, technical and biological processes. Unlike rigid substrates, a droplet deposited on a soft substrate deforms the substrate via a combination of the normal component of surface tension and the Laplace pressure, i.e. by capillary force and the action of disjoining pressure. In turn, the capillary and disjoining pressure-induced substrate deformation affects the wetting phenomena on the substrate. In this review, we summarize recent achievements on static and dynamic wetting of soft substrates and provide an outlook to future progress. In static wetting, theoretical, numerical and experimental investigations of capillary and disjoining pressure-induced substrate deformation are introduced, and corresponding effects on contact angle and contact angle hysteresis are discussed. In dynamic wetting, the influence of substrate stiffness on spontaneous wetting, droplet impact dynamics, and other types of forced wetting and dewetting is considered. Finally, other interesting capillarity-controlled phenomena occurring on soft and soft-like substrates are briefly introduced.

Journal or Publication Title: Current Opinion in Colloid & Interface Science
Volume: 36
Uncontrolled Keywords: Capillary force, Disjoining pressure, Elastocapillary length, Substrate deformation, Contact angle, Contact angle hysteresis, Dynamic wetting, Capillary phenomena
Divisions: 16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Profile Areas > Thermo-Fluids & Interfaces
Profile Areas
16 Department of Mechanical Engineering
Date Deposited: 05 Feb 2018 16:18
DOI: 10.1016/j.cocis.2017.12.001
Official URL: https://doi.org/10.1016/j.cocis.2017.12.001
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