20.500.12556/RUL-136004 Effect of SiO$_2$ and TiO$_2$ nanoparticles on the performance of UV visible fluorescent coatings 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. UV visible fluorescent coatings nanoparticles SiO$_2$ TiO$_2$ fluorescentni UV premazi nanodelci SiO$_2$ TiO$_2$ true false true Angleški jezik Slovenski jezik Članek v reviji 2022-04-06 10:43:04 2022-04-06 10:43:05 2022-09-15 04:13:09 0000-00-00 00:00:00 2021 0 0 18 str. iss. 8, art. 928 Vol. 11 Aug. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 655 2079-6412 10.3390/coatings11080928 73204995 RAZ_Mahovic_Poljacek_Sanja_2021.pdf RAZ_Mahovic_Poljacek_Sanja_2021.pdf 1 CC49BA2508E2F3A861A6151F0B831532 3953a1e2b568d9588ab48ecd2dbbf1a7b5b6c2f44d377067002422a3a3e270d9 cbc5eb08-b585-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155400 https://www.mdpi.com/2079-6412/11/8/928 1 8a997efa-b585-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155399 Naravoslovnotehniška fakulteta 0 0 0