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Antibacterial polyelectrolyte micelles for coating stainless steel

By Céline Falentin, Emilie Faure, Tiziana Svaldo Lanero, Fabrice Farina, Christine Jérôme, Cécile Van de Weerdt, Joseph Martial, Anne-Sophie Duwez and Christophe Detrembleur

Abstract

In this study, we report on the original synthesis and characterization of novel antimicrobial coatings for stainless steel by alternating the deposition of aqueous solutions of positively charged polyelectrolytes micelles doped with silver based nanoparticles with a polyanion. The micelles are formed by electrostatic interaction between two oppositely charged polymers, a polycation bearing 3,4-dihydroxyphenylalanine units (DOPA, a major component of natural adhesives) and a polyanion (poly(styrene sulfonate), PSS) without using any block copolymer. DOPA units are exploited for their well-known ability to anchor to stainless steel and to form and stabilize biocidal silver nanoparticles (Ag0). The chlorine counter-anion of the polycation forms and stabilizes biocidal silver chloride nanoparticles (AgCl). We demonstrate that two layers of micelles (alternated by PSS) doped by silver particles are enough to impart to the surface a strong antibacterial activity against Gram-negative E. coli. Moreover, micelles that are reservoirs of biocidal Ag+ can be easily reactivated after depletion. This novel water-based approach is convenient, simple and attractive for industrial applications.Peer reviewe

Topics: coating, antibacterial polymer, Physical, chemical, mathematical & earth Sciences :: Chemistry, Physique, chimie, mathématiques & sciences de la terre :: Chimie, Engineering, computing & technology :: Materials science & engineering, Ingénierie, informatique & technologie :: Science des matériaux & ingénierie
Publisher: 'American Chemical Society (ACS)'
Year: 2012
DOI identifier: 10.1021/la3003965
OAI identifier: oai:orbi.ulg.ac.be:2268/117498
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