DataVXDigest Journal of Nanomaterials and BiostructuresPaper
journal article·2022-12-22Open access

Preparation and properties of Ag-loaded zinc oxide antibacterial coating on medical cobalt-chromium alloy

College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, PR China, X. P. Xu, Y. Q. Cai, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, PR China, X. G. Chen, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, PR China, Y. Xu, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, PR China

Digest Journal of Nanomaterials and Biostructures· Volume 17· Issue 4
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Abstract

Medical cobalt-chromium alloy has been widely used in oral implants due to its excellent mechanical properties, corrosion resistance, etc. However, its antibacterial properties should be improved as an implant. In this paper, nano-zinc oxide and Ag-loaded zinc oxide coating were prepared on cobalt-chromium alloy using the hydrothermal and photoreduction methods, and the influencing factors of the preparation process were studied. The effects of pH, hydrothermal temperature and time on the morphology of nano-sized zinc oxide were investigated. The results show that the zinc oxide has satisfactory morphology when the hydrothermal time is 3.0 h, hydrothermal temperature is 100 ℃, and pH value is 9.5. The effects of light intensity, illumination duration and AgNO3 concentration on the size and dispersion of silver nanoparticles on the Ag-loaded zinc oxide were studied. The results show that the Ag-loaded zinc oxide has satisfactory morphology under the illumination intensity of 0.6 W/m2 , illumination duration of 60 min and AgNO3 concentration of 1.0 mol/L. By analyzing the morphology, phase, quality and thickness of zinc oxide and Ag-loaded zinc oxide coating, it is found that the needle-like zinc oxide array is uniformly loaded with silver particles. The average thickness of the coatings is 6.80 μm, and the average weight is 1.67 mg. The antibacterial test shows that the Ag-loaded zinc oxide coating has better antibacterial performance than the pure zinc oxide coating, both of which were better than the blank control sample.
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Research context

Metals & alloysNanomaterialsBiomaterials

OpenAlex topics: Advanced Nanomaterials in Catalysis · Nanoparticles: synthesis and applications · Mercury impact and mitigation studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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