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Field Test of Self-Cleaning Zr-Modified-TiO2-SiO2 Films on Glass with a Demonstration of Their Anti-Fogging Effect

1
Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
2
Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
3
University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia
4
Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, 1000 Ljubljana, Slovenia
5
M-Sora d.d., Industrijska ul. 13, SI-4226 Žiri, Slovenia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(13), 2196; https://doi.org/10.3390/ma12132196
Received: 9 June 2019 / Revised: 4 July 2019 / Accepted: 5 July 2019 / Published: 8 July 2019
(This article belongs to the Special Issue Self-Cleaning Surfaces)
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Abstract

The number of commercial products claiming self-cleaning properties is rising and testing of long-term activity and durability of such coatings needs to be addressed more. The time-dependent changes of different characteristics like haze, transparency, and color are essential for transparent glazing materials. Herein, we aimed to examine whether the laboratory results obtained on the Zr-modified-titania-silica (TiZr) self-cleaning materials would translate to larger-scale outdoor-exposed testing. TiZr thin films were deposited via spraying onto float glass window surfaces and exposed into three different environments for 20 months. For comparison, a commercially available active SGG BIOCLEANTM glass and standard float glass were simultaneously exposed in the same conditions. It was shown that the self-cleaning property of either a commercial product or TiZr-coated float glass was not considerably effective in real field test conditions, although the previous laboratory tests showed pronounced photocatalytic activity of TiZr thin films. The inclination angle; however, was shown to have a considerable effect on the self-cleaning ability of samples, as did the rain patterns during the testing period. On the other hand, the anti-fogging effect of our TiZr material was very well expressed in controlled laboratory conditions (measuring droplet formation time) as well as in the real outdoor environment. View Full-Text
Keywords: self-cleaning; anti-fogging; TiO2-SiO2; field test, glazing self-cleaning; anti-fogging; TiO2-SiO2; field test, glazing
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Šuligoj, A.; Pliekhova, O.; Vodišek, N.; Mihelčič, M.; Surca, A.K.; Kunič, R.; Šubic, B.; Starman, J.; Ugovšek, A.; Lavrenčič Štangar, U. Field Test of Self-Cleaning Zr-Modified-TiO2-SiO2 Films on Glass with a Demonstration of Their Anti-Fogging Effect. Materials 2019, 12, 2196.

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