Silver nanoparticle and polyurethane composite provides potential coating options to limit fomite transmission of SARS-CoV-2

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Silver nanoparticle and polyurethane composite provides potential coating options to limit fomite transmission of SARS-CoV-2 SussexUni Nanoparticle Composite SARSCoV2 COVID19 Transmission

By Dr. Chinta SidharthanOct 7 2022Reviewed by Aimee Molineux In a recent study published in Polymers, researchers synthesized and evaluated a silver and polyurethane nanocomposite surface coating material that exhibits antiviral activity against severe acute respiratory syndrome coronavirus 2 .

Metal nanoparticles are combined with polymers to form nanocomposite polymers that exhibit antimicrobial properties. A silver nanoparticle composite polymer that can be used to coat preinstalled touchpoints could provide self-sanitizing surfaces without the need to replace existing fixtures. The nanocomposite was formed by adding silver nanoparticles to polyurethane dissolved in anhydrous tetrahydrofuran to cast films of uniform thickness. The film was then heated at 50 °C and 800 mbar in a vacuum oven and allowed to cool. Fourier transform infrared spectroscopy was used to determine the reactivity of the nanocomposite.

The NMR spectrum contained well-resolved signals for all the expected structural features of the polyurethane. The SEC results revealed a number averaged molecular weight of 8700 g/mol and weight averaged molecular weight of 15,400 g/mol. The FTIR spectrum did not indicate unreactive isocyanate and showed interactions between the silver nanoparticles and the NH and carbonyl groups of the polyurethane.

 

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