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Article

Effect of SiO2 and TiO2 Nanoparticles on the Performance of UV Visible Fluorescent Coatings

1
Faculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, Croatia
2
Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva Cesta 12, SI-1000 Ljubljana, Slovenia
*
Authors to whom correspondence should be addressed.
Academic Editor: Alexander Tolstoguzov
Coatings 2021, 11(8), 928; https://doi.org/10.3390/coatings11080928
Received: 23 June 2021 / Revised: 26 July 2021 / Accepted: 29 July 2021 / Published: 2 August 2021
In the present research, the properties of ultraviolet (UV) visible (daylight invisible) fluorescent coatings modified by the addition of SiO2 and TiO2 nanoparticles were studied. Structural, surface, and mechanical properties and changes in the coatings caused by accelerated ageing were analyzed. The results showed that the addition of nanoparticles caused the changes in unaged and aged printed coatings. Reflectance measurements of modified coatings showed that addition of TiO2 nanoparticles improved the visual effect of the unaged coatings. Furthermore, results have shown that the addition of SiO2 did not diminish the reflectance of the modified coatings after ageing. The results of roughness measurements showed that the addition of SiO2 decreased roughness after the ageing process, probably due to the degradation process indicated by Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) spectroscopy. The roughness of the coatings with TiO2 nanoparticles was increased after the ageing on the samples with higher concentrations of TiO2 due to the agglomerates of plastisol formed on the surface of the coatings, visible in SEM images. Surface analysis of coatings showed that TiO2 caused an increase in the polarity of the surface coatings. Results of the bending stiffness showed that the addition of the nanoparticles to the coating, especially of SiO2, significantly improved the bending stiffness of the unaged samples. View Full-Text
Keywords: UV visible fluorescent coatings; nanoparticles; SiO2; TiO2 UV visible fluorescent coatings; nanoparticles; SiO2; TiO2
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MDPI and ACS Style

Mahović Poljaček, S.; Tomašegović, T.; Leskovšek, M.; Stanković Elesini, U. Effect of SiO2 and TiO2 Nanoparticles on the Performance of UV Visible Fluorescent Coatings. Coatings 2021, 11, 928. https://doi.org/10.3390/coatings11080928

AMA Style

Mahović Poljaček S, Tomašegović T, Leskovšek M, Stanković Elesini U. Effect of SiO2 and TiO2 Nanoparticles on the Performance of UV Visible Fluorescent Coatings. Coatings. 2021; 11(8):928. https://doi.org/10.3390/coatings11080928

Chicago/Turabian Style

Mahović Poljaček, Sanja, Tamara Tomašegović, Mirjam Leskovšek, and Urška Stanković Elesini. 2021. "Effect of SiO2 and TiO2 Nanoparticles on the Performance of UV Visible Fluorescent Coatings" Coatings 11, no. 8: 928. https://doi.org/10.3390/coatings11080928

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