[en] Because of its resistance to corrosion and chemicals, relevant mechanical and esthetical properties, stainless steel (SS) is widely used in the daily life (food industry, household appliances, surgery …). However, SS is unable to prevent bacteria from adhering, proliferating and forming a resistant biofilm when ageing. Therefore, surface modification is needed for providing durable antibacterial properties.
We report here on an all-in-one approach to prepare refillable antimicrobial films using the layer-by-layer deposition of polyelectrolytes. Specifically designed biocidal multilayered polyelectrolyte films that bear 3,4-dihydroxyphenylalanine (DOPA), known as a promoter of adhesion to inorganic surfaces, were deposited onto SS. DOPA was incorporated in the polycationic chains by radical copolymerisation of N-methacrylated DOPA with the quaternary ammonium salt of 2-(dimethylamino)ethyl methacrylate (DMAEMA+). In order to boost the antibacterial activity of the polycationic layer, AgNO3 was added to the aqueous solution of P(DOPA)-co-P(DMAEMA+), which resulted in the in-situ formation of silver based nanoparticles, sources of biocial Ag+. The layer-by-layer deposition of aqueous P(DOPA)-co-P(DMAEMA+)/AgCl/Ag0 suspension and aqueous solution of poly(styrene sulfonate) provides high antibacterial activity against Gram-negative E. Coli bacteria. Moreover, after silver depletion, films retain some antimicrobial activity, thanks to ammonium groups of the copolymer. We also show that the antibacterial activity of the films can then be easily re-boosted.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Faure, Emilie ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Charlot, Aurélia; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Sciannaméa, Valérie; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Lenoir, Sandrine; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Christine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Van de Weerdt, Cécile ; Université de Liège - ULiège > Département des sciences de la vie > Centre of Biomedical Integrative Genoproteomics, Laboratoire de Biologie Moléculaire et de Génie Génétique
Martial, Joseph ; Université de Liège - ULiège > Département des sciences de la vie > Centre of Biomedical Integrative Genoproteomics, Laboratoire de Biologie Moléculaire et de Génie Génétique
Willet, Nicolas ; Université de Liège - ULiège > Department of Chemistry > Nanochemistry and Molecular Systems
Duwez, Anne-Sophie ; Université de Liège - ULiège > Department of Chemistry > Nanochemistry and Molecular Systems
Detrembleur, Christophe ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
A green and refillable antibacterial coating for stainless steel
Publication date :
29 June 2010
Event name :
Coatings Science International (COSi)
Event place :
Noordwijk, Netherlands
Event date :
28/06/2010 - 2/07/2010
Audience :
International
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] ArcelorMittal Research [BE] The "Région Wallonne" in the frame of the "BIOCOAT" program