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- Title
Production of a sprayable waterborne polyurethane coating with silver nanoparticles for combating SARS-CoV-2.
- Authors
Dall Agnol, Lucas; Ornaghi Jr., Heitor Luiz; Ernzen, Juliano Roberto; Dias, Fernanda Trindade Gonzalez; Bianchi, Otávio
- Abstract
To halt the ongoing global pandemic of SARS-CoV-2, the use of antiviral surfaces becomes an interesting alternative to prevent the spread of pathogens through contaminated surfaces. In this context, waterborne polyurethane coatings with silver nanoparticles (WPU/AgNPs) were synthesized in order to confer antiviral activity to the nanocomposites for further application on surfaces. The chemical structure, physico-mechanical properties, cytotoxic, antibacterial, and antiviral properties of WPU/AgNPs nanocomposites were evaluated. The addition of nanoparticles in WPU did not change the structure of the polymer chain; hence, properties such as hardness, tensile strength, and elongation were not influenced. However, an increase in the surface hydrophobicity followed by a slight yellowing due to the intrinsic color of the nanosilver was observed. Furthermore, the nanocomposites did not show in vitro cytotoxicity for BALB/3T3 cells. The nanocomposites were tested against SARS-CoV-2, obtaining inactivation yields greater than 99.0%, and antibacterial activity against Escherichia coli and Staphylococcus aureus even after three months of use. Hence, these nanocomposites were produced as a sprayable polyurethane for surface coatings application, providing a fantastic finish to all kinds of surfaces such as tables, handrails, switches, and doorknobs. This finish is durable, attractive, and long-lasting.
- Subjects
POLYURETHANES; SARS-CoV-2; COVID-19 pandemic; CHEMICAL structure; SURFACE coatings; RAMAN scattering
- Publication
Journal of Coatings Technology & Research, 2023, Vol 20, Issue 6, p1935
- ISSN
1945-9645
- Publication type
Article
- DOI
10.1007/s11998-023-00788-1