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Open AccessArticle

Polyurethane-Based Composites: Effects of Antibacterial Fillers on the Physical-Mechanical Behavior of Thermoplastic Polyurethanes

1
Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”—CNR, Via A. Corti 12, 20133 Milano, Italy
2
Department of Molecular Medicine (DMM), Center for Health Technologies (CHT), UdR INSTM, University of Pavia, Viale Taramelli 3/B, 27100 Pavia, Italy
3
School for Advanced Studies IUSS, Palazzo del Broletto Piazza della Vittoria, 15, 27100 Pavia, Italy
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Department of Occupational Medicine, Toxicology and Environmental Risks, Istituti Clinici Scientifici Maugeri S.p.A Società Benefit, IRCCS, Via S. Boezio 28, 27100 Pavia, Italy
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Department of Chemistry, Physical Chemistry Section, University of Pavia, viale Taramelli 16, 27100 Pavia, Italy
6
Istituto per i Polimeri, Compositi e Biomateriali—CNR, Piazzale Enrico Fermi 1, 80055 Portici (NA), Italy
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(2), 362; https://doi.org/10.3390/polym12020362
Received: 20 December 2019 / Revised: 28 January 2020 / Accepted: 2 February 2020 / Published: 6 February 2020
(This article belongs to the Special Issue Eurofillers Polymer Blends)
The challenge to manufacture medical devices with specific antibacterial functions, and the growing demand for systems able to limit bacterial resistance growth, necessitates the development of new technologies which can be easily produced at an industrial level. The object of this work was the study and the development of silver, titanium dioxide, and chitosan composites for the realization and/or implementation of biomedical devices. Thermoplastic elastomeric polyurethane was selected and used as matrix for the various antibacterial functions introduced during the processing phase (melt compounding). This strategy was employed to directly incorporate antimicrobial agents into the main constituent material of the devices themselves. With the exception of the composite filled with titanium dioxide, all of the other tested composites were shown to possess satisfactory mechanical properties. The best antibacterial effects were obtained with all the composites against Staphylococcus aureus: viability was efficiently inhibited by the prepared materials in four different bacterial culture concentrations.
Keywords: polymer matrix composites; thermoplastic polyurethane (TPU); titanium dioxide; silver; chitosan; physical-mechanical properties; antibacterial polymer matrix composites; thermoplastic polyurethane (TPU); titanium dioxide; silver; chitosan; physical-mechanical properties; antibacterial
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MDPI and ACS Style

Villani, M.; Consonni, R.; Canetti, M.; Bertoglio, F.; Iervese, S.; Bruni, G.; Visai, L.; Iannace, S.; Bertini, F. Polyurethane-Based Composites: Effects of Antibacterial Fillers on the Physical-Mechanical Behavior of Thermoplastic Polyurethanes. Polymers 2020, 12, 362.

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