[SIS7] Powder Design for Industrial Application

[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

*Y. Lin¹, Z. Li¹, X. Wang^{2, 1}, D. Liu³, X. Sun¹ (1.Tianjin University of Technology, China, 2.Tohoku University, Japan, 3.Tianjin Key Laboratory for Photoelectric Materials and Devices, China)

キーワード：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.