Zinc-doped hydroxyapatite—zeolite/polycaprolactone composites coating on magnesium substrate for enhancing in-vitro corrosion and antibacterial performance
| Autor: | Ahmed Alsakkaf, Mohammed Rafiq Abdul Kadir, Saman Iqbal, Nida Iqbal, H. Balaji Raghav, Mohd Hasbullah Idris, Ahmad Kamil, Tanveer Iqbal, Hamid Reza Bakhsheshi-Rad |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number chemistry.chemical_element 02 engineering and technology Zinc engineering.material 01 natural sciences Corrosion chemistry.chemical_compound Coating 0103 physical sciences Materials Chemistry Fourier transform infrared spectroscopy 010302 applied physics technology industry and agriculture Metals and Alloys 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Galvanic corrosion chemistry Polycaprolactone engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 30:123-133 |
| ISSN: | 1003-6326 |
| Popis: | This work is focused on developing zinc-doped hydroxyapatite—zeolite (ZnHA—Zeo) and polycaprolactone (PCL) composite coatings on magnesium (Mg) substrate to improve the corrosion resistance and antimicrobial properties. Dip-coating technique was used to coat ZnHA—Zeo/PCL on the Mg substrate at room temperature. The samples were subjected to field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), energy dispersive X-ray spectroscopy (EDX) and antimicrobial potential. Results demonstrated that composite coatings consist of HA, scholzite, zeolite, and PCL phases. EDX spectra indicated the presence of calcium (Ca), silicon (Si), aluminum (Al), zinc (Zn), phosphorus (P) and oxygen (O). The composite surface appeared in spherical-like microstructure on coating with thickness ranging 226–260 μm. Zinc-doped HA—Zeo composite coating had a high corrosion resistance and provided sufficient protection to the Mg surface against galvanic corrosion. Doped ZnHA—Zeo coating samples exhibited superior disc inhibition by confirming antimicrobial activity against the E. coli as compared to HA—Zeo sample. Altogether these results showed that the ZnHA—Zeo coatings not only improved the corrosion resistance, but also enhanced the antimicrobial property and hence they can be used as suitable candidates for implant applications. |
| Databáze: | OpenAIRE |
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