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Binary TiO2/SiO2 nanoparticle coating for controlling the wetting properties of paperboard
Tampere University of Technology, Finland.
Tampere University of Technology, Finland.
Tampere University of Technology, Finland.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. Tampere University of Technology, Finland.
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2015 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 149, p. 230-237Article in journal (Refereed) Published
Abstract [en]

We introduce a flame based aerosol method to fabricate thin films consisting of binary TiO2/SiO2 nanoparticles deposited directly from the flame onto the paperboard. Nanocoatings were prepared with Liquid Flame Spray (LFS) in a roll-to-roll process with the line speed of 50 m/min. Surface wetting behavior of nanocoated paperboard was studied for different Ti/Si ratios in the precursor, affecting TiO2/SiO2 ratio in the coating. Wettability could be adjusted to practically any water contact angle between 10 and 160° by setting the Ti/Si ratio in the liquid precursor. Structure of the two component nanocoating was analysed with FE-SEM, TEM, EDS, XPS and XRD. The porous thin film coating was concluded to consist of ca. 10 nm sized mixed oxide nanoparticles with segregated TiO2 and SiO2 phases. Accumulation of carbonaceous compounds on the surface was seen to be almost linearly dependent on the Ti/Si ratio, indicating of each species being exposed in corresponding amount. However, wetting of the surface was observed to follow merely an S-shaped curve, caused by the roughness of the nanocoated surface. Reasons for the observed superhydrophobicity and superhydrophilicity of these binary nanocoatings on paperboard are discussed.

Place, publisher, year, edition, pages
2015. Vol. 149, p. 230-237
Keywords [en]
Coatings, Composite materials, Nanostructures, Surfaces, Thin films
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6822DOI: 10.1016/j.matchemphys.2014.10.011Local ID: 23617OAI: oai:DiVA.org:ri-6822DiVA, id: diva2:964662
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-07-02Bibliographically approved

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