Polyurethane-Based Coatings with Promising Antibacterial Properties

In coatings technology, the possibility of introducing specific characteristics at the surface level allows for the manufacture of medical devices with efficient and prolonged antibacterial properties. This efficiency is often achieved by the use of a small amount of antibacterial molecules, which c...

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Bibliographic Details
Published in:Materials 2020-09, Vol.13 (19), p.4296
Main Authors: Villani, Maurizio, Bertoglio, Federico, Restivo, Elisa, Bruni, Giovanna, Iervese, Stefano, Arciola, Carla Renata, Carulli, Francesco, Iannace, Salvatore, Bertini, Fabio, Visai, Livia
Format: Article
Language:English
Subjects:
Adhesion tests
Aqueous solutions
Bacteria
Biofilms
Chitosan
Coatings
Contact angle
Manufacturing
Mechanical properties
Medical equipment
Microorganisms
Molecular weight
Nanoparticles
Nosocomial infections
Polyurethane resins
Reducing agents
Silver
Titanium dioxide
Viscosity
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Summary:In coatings technology, the possibility of introducing specific characteristics at the surface level allows for the manufacture of medical devices with efficient and prolonged antibacterial properties. This efficiency is often achieved by the use of a small amount of antibacterial molecules, which can fulfil their duty while limiting eventual releasing problems. The object of this work was the preparation and characterization of silver, titanium dioxide and chitosan polyurethane-based coatings. Coatings with the three antibacterials were prepared using different deposition techniques, using a brush or a bar coater automatic film applicator, and compared to solvent casted films prepared with the same components. For silver containing materials, an innovative strategy contemplating the use and preparation of silver nanoparticles in a single step-method was employed. This preparation was obtained starting from a silver precursor and using a single compound as the reducing agent and stabilizer. Ultraviolet-visible spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, contact angle measurements and adhesion test experiments were used to characterize the prepared coatings. Promising antibacterial properties, measured via direct and indirect methods, were registered for all the silver-based materials.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13194296