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胡勇,李申申,吴栋,李英新,康文江,张昊,张会莹.聚多巴胺接枝纳米氧化锌复合涂层对TC4合金表面修饰的影响研究[J].稀有金属材料与工程(英文),2021,50(8):2876~2882.[Hu Yong,Li Shenshen,Wu Dong,Li Yingxin,Kang Wenjiang,Zhang Hao and Zhang Huiying.Study on the Effect of Polydopamine Grafted Nano-ZnO Composite Coating on Surface Modification of TC4 Alloy[J].Rare Metal Materials and Engineering,2021,50(8):2876~2882.]
Study on the Effect of Polydopamine Grafted Nano-ZnO Composite Coating on Surface Modification of TC4 Alloy
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Received:August 31, 2020  
DOI:
Key words: TC4  polydopamine  sol-gel method  wettabiliy  corrosion resistance
Foundation item:甘肃省科技重大专项项目(17ZD2GC001)、兰州理工大学红柳一流学科建设基金、兰州理工大学大学生创新创业训练计划项目立项资助(DC2019190)
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Hu Yong,Li Shenshen,Wu Dong,Li Yingxin,Kang Wenjiang,Zhang Hao and Zhang Huiying  
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Abstract:
      In order to solve the problem that Ti6Al4V (TC4) alloy is prone to bacterial infection and release of harmful ions as an orthopedic hard tissue implant during long-term service in the human body, a sol-gel method was used to prepare nano-zinc oxide (ZnO) sol with gradient dynamic heating treatment, then the nano-ZnO coating and ZnO/PDA (polydopamine)composite coating were successfully formed on the surface of TC4. The phase structure, micro morphology, coating adhesion, wettability and corrosion performance of the two coatings in simulated body fluids were systematically analyzed. The result shows that the ZnO/PDA composite coating prepared on the TC4 substrate has a more uniform distribution of nano-ZnO particles than that of a single ZnO coating. The chelating effect of PDA on metal ions promotes the bonding force between the substrate and ZnO through the Ti-O-Zn bond. Simultaneously, the introduction of PDA further improves the wettability of the ZnO coating, reduces its surface roughness, and improves the corrosion resistance of TC4.