title: Silver deposition on polypyrrole films electrosynthesised onto Nitinol alloy. Corrosion protection and antibacterial activity.
abstract: The electrosynthesis of polypyrrole films onto Nitinol from sodium salicylate solutions of different concentrations is reported. The morphology and corrosion protection properties of the resulting coatings were examined and they both depend on the sodium salicylate concentration. The immobilisation of silver species in PPy films constituted by hollow rectangular microtubes was studied as a function of the polymer oxidation degree. The highest amount of silver was deposited when the coated electrode was prepolarised at -1.00V (SCE) before silver deposition, suggesting an increase in the amount of non-oxidised segments in the polymer. Finally, the antibacterial activity of the coating against the Gram positive Staphylococcus aureus and Staphylococcus epidermidis bacteria was evaluated. Both strains resulted sensitive to the modified coatings, obtaining a slightly better result against S. aureus.
authors.affiliation: Instituto de Ingeniería Electroquímica y Corrosión (INIEC), Departamento de Ingeniería Química, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
authors.forename: M
authors.initials: M
authors.lastname: Saugo
authors.affiliation: Instituto de Ingeniería Electroquímica y Corrosión (INIEC), Departamento de Ingeniería Química, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
authors.forename: D O
authors.initials: DO
authors.lastname: Flamini
authors.affiliation: Planta Piloto de Ingeniería Química, Universidad Nacional del Sur, CONICET, Camino La Carrindanga Km 7, 8000 Bahía Blanca, Argentina.
authors.forename: L I
authors.initials: LI
authors.lastname: Brugnoni
authors.affiliation: Instituto de Ingeniería Electroquímica y Corrosión (INIEC), Departamento de Ingeniería Química, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina. Electronic address: ssaidman@criba.edu.ar.
authors.forename: S B
authors.initials: SB
authors.lastname: Saidman
mesh_terms: D000497:Alloys / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D003343:Corrosion; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012980:Sodium Salicylate / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013211:Staphylococcus aureus / Q000187:drug effects; D013212:Staphylococcus epidermidis / Q000187:drug effects
chemical_list: D000497:Alloys; D000900:Anti-Bacterial Agents; D011108:Polymers; D011758:Pyrroles; D012996:Solutions; C013616:nitinol; C067635:polypyrrole; D012834:Silver; D012980:Sodium Salicylate
keywords: Antibacterial activity; Electropolymerisation; Nitinol; Polypyrrole; Salicylate; Silver