Sanja Mahović Poljaček (Author), Tamara Tomašegović (Author), Mirjam Leskovšek (Author), Urška Stankovič Elesini (Author)

Abstract

In the present research, the properties of ultraviolet (UV) visible (daylight invisible) fluorescent coatings modified by the addition of SiO$_2$ and TiO$_2$ 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 TiO$_2$ nanoparticles improved the visual effect of the unaged coatings. Furthermore, results have shown that the addition of SiO$_2$ did not diminish the reflectance of the modified coatings after ageing. The results of roughness measurements showed that the addition of SiO$_2$ 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 TiO$_2$ nanoparticles was increased after the ageing on the samples with higher concentrations of TiO$_2$ due to the agglomerates of plastisol formed on the surface of the coatings, visible in SEM images. Surface analysis of coatings showed that TiO$_2$ 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 SiO$_2$, significantly improved the bending stiffness of the unaged samples.

Keywords

fluorescentni UV premazi;nanodelci;SiO2;TiO2;UV visible fluorescent coatings;nanoparticles;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL NTF - Faculty of Natural Sciences and Engineering
UDC: 655
COBISS: 73204995 Link will open in a new window
ISSN: 2079-6412
Views: 76
Downloads: 42
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Other data

Secondary language: Slovenian
Secondary keywords: fluorescentni UV premazi;nanodelci;SiO$_2$;TiO$_2$;
Type (COBISS): Article
Pages: str. 1-18
Volume: ǂVol. ǂ11
Issue: ǂiss. ǂ8
Chronology: 2 August 2021
DOI: 10.3390/coatings11080928
ID: 14956875