Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

Vlădescu, Alina; Vrânceanu, Diana Maria; Kulesza, Sławomir; Иванов, А. Н.; Bramowicz, Mirosław; Fedonnikov, Alexander S.; Braic, M.; Норкин, И. А.; Koptyug, Andrey; Kurtukova, Maria O.; Dinu, Mihaela; Pană, Iulian; Surmenev, Roman A.; Cotruț, Cosmin M.

doi:10.1038/s41598-017-16985-z

Cited by 49 publications

(38 citation statements)

References 70 publications

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“…Following the increase in hydroxide ion concentration, both of the hydrogen phosphate ions and phosphate ions have a greater concentration (Equations (3) and (4)). Simultaneously, calcium ions move to the proximity of the cathode and start reacting with phosphate groups and hydroxyl radicals to generate HA (Equation (5)) [40]. The production of a small amount of carbonate (CO 3 2− ) detected in the FTIR spectrum is as follows:normalCO2+H2normalO→H2normalCO3 H2normalCO3+normalOH−→normalHnormalCO3−+H2normalO normalHnormalCO3−+normalOH−→normalCO32−+H2normalO…”

Section: Resultsmentioning

confidence: 99%

Properties and Mechanism of Hydroxyapatite Coating Prepared by Electrodeposition on a Braid for Biodegradable Bone Scaffolds

Ling

Lin

et al. 2019

Nanomaterials

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Hydroxyapatite (HA) coating is successfully prepared by electrodeposition on the surface of polyvinyl alcohol (PVA)/polylactic acid (PLA) braid which serves as a potential biodegradable bone scaffold. The surface morphology, element composition, crystallinity and chemical bonds of HA coatings at various deposition times (60, 75, 90, 105 and 120 min) are characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), respectively. Average Surface roughness (Ra) of HA coating is observed by confocal microscopy. The results reveal that the typical characteristic peaks of the FTIR spectrum confirm that HA coating is successfully prepared on the rugged surface of the PVA/PLA braid. The XRD results indicate that the crystallinity of HA can be improved by increasing deposition time. In the 90 min-deposition, hydroxyapatite has a dense and uniform coating morphology, Ca/P ratio of 1.7, roughness of 0.725 μm, which shows the best electrodeposition performance. The formation mechanism of granular and plate-like hydroxyapatite crystals is explained by the structural characteristics of a hydroxyapatite unit cell. This study provides a foundation for a bone scaffold braided by biodegradable fibers.

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Section: Resultsmentioning

confidence: 99%

Properties and Mechanism of Hydroxyapatite Coating Prepared by Electrodeposition on a Braid for Biodegradable Bone Scaffolds

Ling

Lin

et al. 2019

Nanomaterials

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“…The protective efficiency (P e ) was also calculated based on the formula reported in Refs. [73,74], considering the ion corrosion densities of the substrate (i corr-substrate ) and coating (i corr_coating ):…”

Section: Characterization Of Coatingsmentioning

confidence: 99%

In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel

et al. 2020

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The reactive cathodic arc deposition technique was used to produce Ti nitride and oxynitride coatings on 304 stainless steel substrates (SS). Both mono (SS/TiN, SS/TiNO) and bilayer coatings (SS/TiN/TiNO and SS/TiNO/TiN) were investigated in terms of elemental and phase composition, microstructure, grain size, morphology, and roughness. The corrosion behavior in a solution consisting of 0.10 M NaCl + 1.96 M H2O2 was evaluated, aiming for biomedical applications. The results showed that the coatings were compact, homogeneously deposited on the substrate, and displaying rough surfaces. The XRD analysis indicated that both mono and bilayer coatings showed only cubic phases with (111) and (222) preferred orientations. The highest crystallinity was shown by the SS/TiN coating, as indicated also by the largest grain size of 23.8 nm, which progressively decreased to 16.3 nm for the SS/TiNO monolayer. The oxynitride layers exhibited the best in vitro corrosion resistance either as a monolayer or as a top layer in the bilayer structure, making them a good candidate for implant applications.

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“…In order to show details of the mechanism of biomineralization/degradation, the EDS results are also presented in Figure 2. For initial assessment of the potential bioactivity of a material, the apatite formation occurring in vivo was reproduced in vitro in different acellular media [44,[48][49][50][51][52][53].…”

Section: Sem and Eds After Immersion In Dmem Sbf And Pbsmentioning

confidence: 99%

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

et al. 2019

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Considering the requirements of medical implantable devices, it is pointed out that biomaterials should play a more sophisticated, longer-term role in the customization and optimization of the material–tissue interface in order to ensure the best long-term clinical outcomes. The aim of this contribution was to assess the performance of silicon carbide–hydroxyapatite in various simulated biological fluids (Dulbecco’s modified Eagle’s medium (DMEM), simulated body fluid (SBF), and phosphate buffer solution (PBS)) through immersion assays for 21 days at 37 ± 0.5 °C and to evaluate the electrochemical behavior. The coatings were prepared on Ti6Al4V alloy substrates by magnetron sputtering method using two cathodes made of hydroxyapatite and silicon carbide (SiC). After immersion assays the coating’s surface was analyzed in terms of morphology, chemical and phase composition, and chemical bonds. According to the electrochemical behavior in the media investigated at 37 ± 0.5 °C, SiC addition inhibits the dissolution of the hydroxyapatite in DMEM acellular media. Furthermore, after adding SiC, the slow degradation of hydroxyapatite in PBS and SBF media as well as biomineralization in DMEM were observed.

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Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

Cited by 49 publications

References 70 publications

Properties and Mechanism of Hydroxyapatite Coating Prepared by Electrodeposition on a Braid for Biodegradable Bone Scaffolds

Properties and Mechanism of Hydroxyapatite Coating Prepared by Electrodeposition on a Braid for Biodegradable Bone Scaffolds

In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

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