Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance
The high activity of metallic magnesium and alloys limits its potential in biomedical applications; in recent years, extensive efforts have been devoted to modulating this reactivity. In this work, we present Mg(OH)2 and TiO2 barrier coatings to reduce the degradation of magnesium alloy (Mg-Ca-Zn) s...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956722002006 |
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| author | Leonardo Hernández Jesús Ramón-Sierra Montserrat Soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth Ortiz-Vázquez Gloria Acosta |
| author_facet | Leonardo Hernández Jesús Ramón-Sierra Montserrat Soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth Ortiz-Vázquez Gloria Acosta |
| author_sort | Leonardo Hernández |
| collection | DOAJ |
| description | The high activity of metallic magnesium and alloys limits its potential in biomedical applications; in recent years, extensive efforts have been devoted to modulating this reactivity. In this work, we present Mg(OH)2 and TiO2 barrier coatings to reduce the degradation of magnesium alloy (Mg-Ca-Zn) surfaces. These coatings were deposited by the anodization method and the spin-coating technique, respectively. The anodized layer was coated with TiO2 generated from the hydrolysis of 3% weight of TTIP (Ti[OCH(CH3)2]4, Titanium(IV) isopropoxide) in 2-Propanol deposited by the spin-coating method. Studying the degradation in Ringer's solution by electrochemical impedance spectroscopy and OCP revealed a 98% reduction in pittings in uncoated samples after 14 days of immersion. The pH measurements revealed that the TiO2 coating reduced the alkalization of the physiological environment, keeping the pH at 6.0 values. In vitro studies of two types of bacteria (E. coli and S. aureus) exhibited zones of inhibition in the agar and activity bactericidal (kill time test). The mechanisms behind the improved degradation resistance and enhanced antibacterial activity are presented and discussed here. Surface modification with Mg(OH)2/TiO2 coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration. |
| first_indexed | 2024-04-10T08:50:18Z |
| format | Article |
| id | doaj.art-893cebb4359844dfbc3faa06dc94e3f3 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-10T08:50:18Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-893cebb4359844dfbc3faa06dc94e3f32023-02-22T04:30:21ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-01-01111361378Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performanceLeonardo Hernández0Jesús Ramón-Sierra1Montserrat Soria-Castro2Ángel Bacelis3Geonel Rodríguez-Gattorno4Elizabeth Ortiz-Vázquez5Gloria Acosta6Applied Physics Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Carr. Ant. a Progreso km. 6, C.P. 97310, Merida, Yucatan, Mexico; Corresponding author.Tecnológico Nacional de México/Instituto Tecnológico de Mérida. Av. Tecnológico s/n Km. 4.5 ant. Carr. Mérida-Progreso, C.P. 97118, Mérida, Yucatán, MéxicoApplied Physics Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Carr. Ant. a Progreso km. 6, C.P. 97310, Merida, Yucatan, MexicoApplied Physics Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Carr. Ant. a Progreso km. 6, C.P. 97310, Merida, Yucatan, MexicoApplied Physics Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), Carr. Ant. a Progreso km. 6, C.P. 97310, Merida, Yucatan, MexicoTecnológico Nacional de México/Instituto Tecnológico de Mérida. Av. Tecnológico s/n Km. 4.5 ant. Carr. Mérida-Progreso, C.P. 97118, Mérida, Yucatán, MéxicoFacultad de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, C.P. 04510, Coyoacán, CDMX, MéxicoThe high activity of metallic magnesium and alloys limits its potential in biomedical applications; in recent years, extensive efforts have been devoted to modulating this reactivity. In this work, we present Mg(OH)2 and TiO2 barrier coatings to reduce the degradation of magnesium alloy (Mg-Ca-Zn) surfaces. These coatings were deposited by the anodization method and the spin-coating technique, respectively. The anodized layer was coated with TiO2 generated from the hydrolysis of 3% weight of TTIP (Ti[OCH(CH3)2]4, Titanium(IV) isopropoxide) in 2-Propanol deposited by the spin-coating method. Studying the degradation in Ringer's solution by electrochemical impedance spectroscopy and OCP revealed a 98% reduction in pittings in uncoated samples after 14 days of immersion. The pH measurements revealed that the TiO2 coating reduced the alkalization of the physiological environment, keeping the pH at 6.0 values. In vitro studies of two types of bacteria (E. coli and S. aureus) exhibited zones of inhibition in the agar and activity bactericidal (kill time test). The mechanisms behind the improved degradation resistance and enhanced antibacterial activity are presented and discussed here. Surface modification with Mg(OH)2/TiO2 coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration.http://www.sciencedirect.com/science/article/pii/S2213956722002006Magnesium alloyEISMg(OH)2TiO2Antibacterial coatings |
| spellingShingle | Leonardo Hernández Jesús Ramón-Sierra Montserrat Soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth Ortiz-Vázquez Gloria Acosta Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance Journal of Magnesium and Alloys Magnesium alloy EIS Mg(OH)2 TiO2 Antibacterial coatings |
| title | Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance |
| title_full | Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance |
| title_fullStr | Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance |
| title_full_unstemmed | Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance |
| title_short | Assessment of Mg(OH)2/TiO2 coating in the Mg‐Ca‐Zn alloy for improved corrosion resistance and antibacterial performance |
| title_sort | assessment of mg oh 2 tio2 coating in the mg ca zn alloy for improved corrosion resistance and antibacterial performance |
| topic | Magnesium alloy EIS Mg(OH)2 TiO2 Antibacterial coatings |
| url | http://www.sciencedirect.com/science/article/pii/S2213956722002006 |
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