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Wetting and Evaporation of Solvents on Thin Soluble Substrates

Wolf, Christian and Gambaryan-Roisman, Tatiana (2020):
Wetting and Evaporation of Solvents on Thin Soluble Substrates.
In: Colloids and Interfaces, 4 (4), p. 48. ISSN 2504-5377,
DOI: 10.3390/colloids4040048,
[Article]

Abstract

In this work, the wetting and evaporation behaviour of non-polar solvent droplets on thin soluble coatings is investigated experimentally. The wetting process on spin-coated polymer layers by toluene is captured using shadowgraphy. Initial spontaneous dynamic wetting as well as later stages of wetting are recorded and evaluated. Furthermore, structures obtained by wetting and subsequent evaporation of solvents on polymer coatings are studied by confocal microscopy. The solubility of the substrate has been varied by using polymers with different molecular masses. We observe that initial spreading dynamics does not depend on the molar mass in the studied range. However, we find a strong influence of the molar mass on the late stage wetting dynamics and on the surface structure after solvent evaporation.

Item Type: Article
Erschienen: 2020
Creators: Wolf, Christian and Gambaryan-Roisman, Tatiana
Title: Wetting and Evaporation of Solvents on Thin Soluble Substrates
Language: English
Abstract:

In this work, the wetting and evaporation behaviour of non-polar solvent droplets on thin soluble coatings is investigated experimentally. The wetting process on spin-coated polymer layers by toluene is captured using shadowgraphy. Initial spontaneous dynamic wetting as well as later stages of wetting are recorded and evaluated. Furthermore, structures obtained by wetting and subsequent evaporation of solvents on polymer coatings are studied by confocal microscopy. The solubility of the substrate has been varied by using polymers with different molecular masses. We observe that initial spreading dynamics does not depend on the molar mass in the studied range. However, we find a strong influence of the molar mass on the late stage wetting dynamics and on the surface structure after solvent evaporation.

Journal or Publication Title: Colloids and Interfaces
Journal volume: 4
Number: 4
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Date Deposited: 04 Nov 2020 06:10
DOI: 10.3390/colloids4040048
Official URL: https://www.mdpi.com/2504-5377/4/4/48
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