1. Corrosion behavior, antibacterial ability, and osteogenic activity of Zn-incorporated Ni-Ti-O nanopore layers on NiTi alloy
- Author
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Yi Zhang, He Zhang, Youjie Rong, Xiaohong Yao, Run-Hua Yao, Yuyu Zhao, Ruiqiang Hang, and Yonghua Sun
- Subjects
Materials science ,Polymers and Plastics ,Nanoporous ,Anodizing ,Mechanical Engineering ,Metals and Alloys ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Mineralization (biology) ,0104 chemical sciences ,Corrosion ,Niti alloy ,Nanopore ,Chemical engineering ,Mechanics of Materials ,Nickel titanium ,Materials Chemistry ,Ceramics and Composites ,0210 nano-technology ,Corrosion behavior - Abstract
Development of bone fixation devices with excellent corrosion resistance, antibacterial ability, and osteogenic activity is critical for promoting fracture healing. In this study, Zn-incorporated nanopore (NP) layers were prepared on the NiTi alloy through anodization and hydrothermal treatment. Results show that Zn can be evenly incorporated into the NP layers in the form of ZnTiO3. The Zn-incorporated samples exhibit good corrosion resistance and significantly reduce Ni2+ release. Meanwhile, the samples can continuously release Zn2+, which is responsible for excellent long-term antibacterial ability. Furthermore, the synergetic effect of Zn2+ release and nanoporous structure of the NP layers endues the NiTi alloy excellent osteogenic activity, as verified by upregulated alkaline phosphatase activity, secretion of type I collagen, and extracellular matrix mineralization. Therefore, Zn-incorporated Ni-Ti-O NP layers have great potential as biomedical coatings of NiTi-based implant materials.
- Published
- 2022