期刊
CERAMICS INTERNATIONAL
卷 47, 期 19, 页码 27071-27081出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.06.120
关键词
Composite coatings; hydroxyapatite; Chitosan; Graphene oxide; Biological properties
Ternary HA/chitosan/graphene oxide (GO) coating was successfully deposited on AZ91D magnesium alloy as bone implants. The addition of GO resulted in increased hardness, improved HA growth, decreased corrosion rate, and enhanced antibacterial properties of the composite coatings.
In this work, ternary HA/chitosan/graphene oxide (GO) coating was applied via electrophoretic deposition on AZ91D magnesium alloy as bone implants, successfully. Subsequently, phase composition, surface morphology, hardness, corrosion behavior, bioactivity and antibacterial of the composite coatings were studied. Hardness and Young's modulus of the composite coatings increased from 40 +/- 1.5 MPa and 3.1 +/- 0.42 GPa to 60 +/- 3.12 MPa and 8 +/- 0.53 GPa for composite coatings with 0 and 2 wt% GO, respectively. The results of the SBF solution soaking of the composites after 24 days, indicated the improvement of HA growth due to the increasing of the GO addition in composite coating. New HA grains with leaf-like morphology grew uniformly at higher amounts of GO (1 and 2 %wt) in a perfectly balanced composition. Rate of the substrate corrosion significantly decreased from 4.3 to 0.2 (mpy), when the amount of GO increased from 0 to 2 wt% due to reduction of the surface cracks at the presence of the GO reinforcement. Also, there was no Escherichia coli and Staphylococcus aureus bacteria growth in broth medium after 24 h and OD600 results at 24 h post inoculation for the 2%wt GO addition in coating.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据