Home > Articles > Published articles > Accelerated biodegradation of FeMn porous alloy coated with ZnO : |
Date: | 2023 |
Abstract: | Fe-based alloys are being studied as potential candidates for biodegradable implants; however, their degradation rates remain too slow. To accelerate biodegradation while simultaneously hindering biofilm formation, a ZnO coating was deposited onto porous equiatomic FeMn alloy discs by sol-gel method using dip coating. The effect of the ZnO coating on the microstructure, biodegradability, cytocompatibility, and antibacterial properties were investigated. Biodegradability experiments were performed by immersing the specimens in Hank's balanced salt solution and measuring ion release after up to 28 days of immersion. The experiments showed an increased degradation of the FeMn/ZnO sample due to Fe segregation towards the grain boundaries, formation of iron-manganese oxide, and limited formation of degradation products on ZnO. Further, indirect Saos-2 cell cytotoxicity testing in 24 h sample-conditioned media showed no significant cytotoxicity in concentrations equal to or below 50 %. In addition, the total biofilm biovolume formed by Staphylococcus aureus on the FeMn/ZnO surface was significantly reduced compared to the uncoated FeMn. Taken together, these results show that the ZnO coating on FeMn improves the degradation rate, maintains cytocompatibility, and reduces biofilm accumulation when compared to an uncoated FeMn alloy. |
Grants: | European Commission 861046 Agencia Estatal de Investigación PID2020-116844RB-C21 Agencia Estatal de Investigación PID2020 116844RB-C22 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00651 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00122 |
Note: | Altres ajuts: acords transformatius de la UAB |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Zinc oxide coating ; Iron‑manganese alloys ; Biofilm ; Cytocompatibility ; Staphylococcus aureus ; Saos-2 |
Published in: | Surface and coatings technology, Vol. 471 (October 2023) , art. 129886, ISSN 0257-8972 |
14 p, 13.9 MB |