Effect of SiO$_2$ and TiO$_2$ nanoparticles on the performance of UV visible fluorescent coatings

Mahović Poljaček, Sanja (author), Tomašegović, Tamara (author), Leskovšek, Mirjam (author), Stanković Elesini, Urška (author)

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.

• Language: English
• Keywords: UV visible fluorescent coatings, nanoparticles, SiO$_2$, TiO$_2$
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 18 str.
• Numbering: Vol. 11, iss. 8, art. 928
• PID: 20.500.12556/RUL-136004
• UDC: 655
• ISSN on article: 2079-6412
• DOI: 10.3390/coatings11080928
• COBISS.SI-ID: 73204995
• Publication date in RUL: 06.04.2022

Record is a part of a journal

• Title: Coatings
• Shortened title: Coatings
• Publisher: MDPI AG
• ISSN: 2079-6412
• COBISS.SI-ID: 523035673

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 02.08.2021

Secondary language

• Language: Slovenian
• Keywords: fluorescentni UV premazi, nanodelci, SiO$_2$, TiO$_2$

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: University of Zagreb