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Erschienen in: Journal of Sol-Gel Science and Technology 3/2020

29.08.2020 | Original Paper: Sol-gel and hybrid materials with surface modification for applications

Effect of the addition of calcium salts on the structure and anticorrosion properties of siloxane-poly(hydroxyethyl methacrylate) hybrid coating applied on Ti-6Al-4V alloy

verfasst von: Larissa de Lima Almeida, Deidyane Wityla Félix da Silva Ferreira, Joseane de Andrade Santana, Cristián Huck-Iriart, Sandra Raquel Kunst, Jane Zoppas Ferreira, Cláudia Trindade Oliveira, Victor Hugo Vitorino Sarmento

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2020

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Abstract

Siloxane-pHEMA hybrid coatings with the addition of calcium chloride and calcium sulfate during the synthesis of the material were produced by the sol–gel method and deposited on Ti-6Al-4V alloy by dip-coating. The structural characteristics of the hybrid materials were analyzed by means of Nuclear Magnetic Resonance and Small/Wide Angle X-ray Scattering; their morphological properties were analyzed by means of Scanning Electron Microscopy and Atomic Force Microscopy. The electrochemical behavior and resistance to corrosion of hybrid coatings with and without addition of calcium salts were analyzed by means of Electrochemical Impedance Spectroscopy. The results showed that the coatings were homogeneous due to the rigid silica network formed during the polymerization, hydrolysis and reactions of condensation. In the sample, into which calcium sulfate was added, there was a decrease of the average roughness value (15.0 nm), while exhibiting regular topography and good adhesion to the substrate, suggesting that this coating has appealing characteristics for anticorrosive applications. Electrochemical tests in simulated body fluid (that underwent simulation) showed that the coatings with hybrid system showed better properties of a barrier with up to 96 h of immersion, in comparison to samples without coating. Therefore, these coatings showed promising features suitable for anticorrosion applications in biomaterials. Moreover, due to the addition of calcium sulfate, coatings made it possible to convey a good balance between biological and anticorrosion properties and, which in itself allows biocompatibility without compromising resistance to corrosion.

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Metadaten
Titel
Effect of the addition of calcium salts on the structure and anticorrosion properties of siloxane-poly(hydroxyethyl methacrylate) hybrid coating applied on Ti-6Al-4V alloy
verfasst von
Larissa de Lima Almeida
Deidyane Wityla Félix da Silva Ferreira
Joseane de Andrade Santana
Cristián Huck-Iriart
Sandra Raquel Kunst
Jane Zoppas Ferreira
Cláudia Trindade Oliveira
Victor Hugo Vitorino Sarmento
Publikationsdatum
29.08.2020
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2020
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-020-05394-w

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