High- and low-adhesive superhydrophobicity on the liquid flame spray-coated board and paper: structural effects on surface wetting and transition between the low- and high-adhesive states

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Hannu Teisala, Mikko Tuominen, Mikko Aromaa, Milena Stepien, Jyrki M. Mäkelä, Jarkko J. Saarinen, Martti Toivakka, Jurkka Kuusipalo
Publisher: SPRINGER
Publication year: 2013
Journal: Colloid and Polymer Science
Journal acronym: COLLOID POLYM SCI
Volume number: 291
Issue number: 2
Start page: 447
End page: 455
Number of pages: 9
ISSN: 0303-402X
eISSN: 1435-1536


Abstract

Surface wetting is an important and relevant phenomenon in several different fields. Scientists have introduced a large number of applications where special surface wetting could be exploited. Here, we study wetting phenomena on high- and low-adhesive superhydrophobic liquid flame spray (LFS)-generated TiO2 coatings on paper and pigment-coated board substrates using water-ethanol solution as a probe liquid. Submicrometer-scale air gaps, which exist on superhydrophobic surfaces below the liquid droplets, were more stable with the ethanol increment than the larger-scale micrometric air gaps. With the droplet ethanol concentration of 15 wt%, static contact angle as high as 155 +/- 2A degrees was measured on the LFS-TiO2-coated board. Transition from the low-adhesive wetting state to the high-adhesive state was demonstrated on the LFS-TiO2-coated paper. The LFS method enables efficient roll-to-roll production of surfaces with special wetting properties on economically viable board and paper substrate materials.


Keywords

Contact angle hysteresis, Hierarchical roughness, Paper, Roll-to-roll process, Superhydrophobic, Wetting

Last updated on 2019-19-08 at 05:30

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