Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of...Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of TiN coatings. A TiO2 rutile film was obtained after annealing of a supplied 316 stainless steel with a TiN coating. This TiO2 upperlayer displays a photocatalytic activity under UV light exposure. The substrates with the TiN coating and the TiO2 upperlayer are more hydrophobic than the 316 control. The adhesion of either Listeria or Pseudomonas, on 316-TIN is characterized by the presence of clusters of cells, while the oxidation of the TiN surface leads to a more hydrophilic layer where cells are individualized. After UV illumination of the adherent cells and subsequent growth, the residual bacterial population present on 316-TIO2 is lower than that present on the 316-TIN. The bactericidal effect is more important on Listeria than on Pseudomonas.展开更多
文摘Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of TiN coatings. A TiO2 rutile film was obtained after annealing of a supplied 316 stainless steel with a TiN coating. This TiO2 upperlayer displays a photocatalytic activity under UV light exposure. The substrates with the TiN coating and the TiO2 upperlayer are more hydrophobic than the 316 control. The adhesion of either Listeria or Pseudomonas, on 316-TIN is characterized by the presence of clusters of cells, while the oxidation of the TiN surface leads to a more hydrophilic layer where cells are individualized. After UV illumination of the adherent cells and subsequent growth, the residual bacterial population present on 316-TIO2 is lower than that present on the 316-TIN. The bactericidal effect is more important on Listeria than on Pseudomonas.
