11:35 AM - 11:55 AM
[16C-SIS7-04] A Novel in situ Wetting Method to Develop Biodegradable Ag+Fe2O3@GO/Zn Biocomposites with Ameliorated Interfacial Properties and Substantial Antibacterial Activity
Keywords:biodegradable Zn-based materials, in situ wetting strategy, interfacial strengthening, biocompatibility
Biodegradable Zn matrix composites were considered as one of the most promising candidates for medical implantable metals. However, the easily agglomerative reinforcement and the poor interfacial bonding between matrix and reinforcement would greatly affect the performance of composites. We designed an innovative in situ wetting strategy to strengthen interfacial bonding and improve biocompatibility by using Ag and Fe2O3 modified graphene oxide (Ag+Fe2O3@GO) as the reinforcement of Zn-based composites. During the subsequent spark plasma sintering (SPS), Fe2O3 induced an in-situ redox reaction with Zn matrix, simultaneously resulting in an in-situ generated ZnO interlayer and the elemental Fe. Elemental Fe and Ag could further alloy with Zn matrix contributing to the precipitation of secondary phase and solid solution in the Zn matrix, thereby garnering ZnO@GO/Zn-Ag-Fe biocomposites through only one-step sintering process. This work could provide an inspiring and creative approach for the interfacial design and biofunctionalization of advanced Zn matrix biocomposites.