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<p>NiTi alloy has been widely used as orthopedic implant materials due to its unique shape memory properties and superelasticity. However, implantation failure often occurs because of the poor antibacterial ability, antioxidation property and corrosion resistance of the NiTi alloy. In order to overcome the above problems, we constructed Zn/ polydopamine (PDA)/Chitosan-Catechol (CS-C) composite coating on the surface of NiTi alloy in this paper. The surface morphology and wettability of the coating were characterized by scanning electron microscopy (SEM) and optical contact angle measuring instrument, respectively. The results showed that the Zn/ CS-C coating was successfully prepared, and exhibited good hydrophilic property, especially the sample Zn/PDA/CS-C-24&#xa0;h. In addition, the corrosion resistance, antioxidation property and biological properties of the coating were systematically analyzed. The results indicated that the Zn/PDA/CS-C composite coating exhibited good corrosion resistance and antibacterial property, antioxidant property and osteogenic activity, especially sample Zn/PDA/CS-C-24&#xa0;h. The sample Zn/PDA/CS-C-24&#xa0;h could effectively protect osteoblasts from reactive oxygen species (ROS) damage and promote cell proliferation and osteoblast differentiation. This study provides a feasible and effective strategy for the surface modification of orthopedic implant.</p>

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Corrosion Behavior, Antioxidation Property, Antibacterial Ability, and Osteogenic Activity of Zn / Chitosan-Catechol Coating Prepared on NiTi Alloy

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Shuaiwu Peng,
  • Zejun Chen,
  • Runhua Yao,
  • Sen Pei,
  • Ruiqiang Hang,
  • Yonghua Sun,
  • Xiaohong Yao,
  • Ying Lu

摘要

NiTi alloy has been widely used as orthopedic implant materials due to its unique shape memory properties and superelasticity. However, implantation failure often occurs because of the poor antibacterial ability, antioxidation property and corrosion resistance of the NiTi alloy. In order to overcome the above problems, we constructed Zn/ polydopamine (PDA)/Chitosan-Catechol (CS-C) composite coating on the surface of NiTi alloy in this paper. The surface morphology and wettability of the coating were characterized by scanning electron microscopy (SEM) and optical contact angle measuring instrument, respectively. The results showed that the Zn/ CS-C coating was successfully prepared, and exhibited good hydrophilic property, especially the sample Zn/PDA/CS-C-24 h. In addition, the corrosion resistance, antioxidation property and biological properties of the coating were systematically analyzed. The results indicated that the Zn/PDA/CS-C composite coating exhibited good corrosion resistance and antibacterial property, antioxidant property and osteogenic activity, especially sample Zn/PDA/CS-C-24 h. The sample Zn/PDA/CS-C-24 h could effectively protect osteoblasts from reactive oxygen species (ROS) damage and promote cell proliferation and osteoblast differentiation. This study provides a feasible and effective strategy for the surface modification of orthopedic implant.