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The Influence of Surface Wettability and Topography on the Bioactivity of TiO2/Epoxy Coatings on AISI 316L Stainless Steel

Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia
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Materials 2019, 12(11), 1877; https://doi.org/10.3390/ma12111877
Received: 7 May 2019 / Revised: 5 June 2019 / Accepted: 10 June 2019 / Published: 11 June 2019
Epoxy/TiO2/epoxy and epoxy/FAS-TiO2/epoxy coatings were applied to the surface of AISI 316L stainless steel with the aim to improve the biocompatibility and antibacterial properties. Contact-angle measurements were used to evaluate the wetting properties of the epoxy, epoxy/TiO2/epoxy and epoxy/FAS-TiO2/epoxy coatings. The epoxy and epoxy/TiO2/epoxy coatings were hydrophilic compared with the strongly hydrophobic epoxy/FAS-TiO2/epoxy coating. The average surface roughness (Sa) of the epoxy/FAS-TiO2/epoxy coating was higher than that of the epoxy/TiO2/epoxy coating due to the formation of agglomerates. The biocompatibility evaluation revealed that the cell attachment was significantly higher on the epoxy/FAS-TiO2/epoxy and epoxy/TiO2/epoxy coatings compared with the pure epoxy coating. We also observed improved antibacterial properties for the epoxy coatings with the addition of both TiO2 and FAS-TiO2 nanoparticles. View Full-Text
Keywords: epoxy coatings; TiO2 nanoparticles; biocompatibility; antibacterial properties epoxy coatings; TiO2 nanoparticles; biocompatibility; antibacterial properties
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Kocijan, A.; Conradi, M.; Hočevar, M. The Influence of Surface Wettability and Topography on the Bioactivity of TiO2/Epoxy Coatings on AISI 316L Stainless Steel. Materials 2019, 12, 1877.

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