J. Mater. Sci. Technol. ›› 2025, Vol. 237: 201-218.DOI: 10.1016/j.jmst.2025.02.046

• Research Article • Previous Articles     Next Articles

Fabrication of Nb2C MXene coated zinc for improved degradation, antibacterial activity, and osteogenesis for guided bone regeneration applications

Hongyan Tanga, Yuan Zhanga, Yingman Chena, Jun Wanga, Chenyang Huanga, Hongtao Yangb, Qiang Wangc, Yanjie Baid, Ping Lia, Xuenan Gua,*, Yubo Fana,b,*   

  1. aKey Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China;
    bSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China;
    cSchool and Hospital of Stomatology, China Medical University, Shenyang 110001, China;
    dStomatology Department, Peking University Third Hospital, Beijing 100191, China
  • Received:2024-09-30 Revised:2025-01-03 Accepted:2025-02-03 Published:2025-12-01 Online:2026-01-08
  • Contact: *E-mail addresses: xngu@buaa.edu.cn (X. Gu), yubofan@buaa.edu.cn (Y. Fan) .

Abstract: Addressing the limitations of current commercial GBR membranes has driven a continued commitment to optimize materials, which integrate mechanical stability, biodegradability, antibacterial, and osteogenic functionality. Zinc (Zn) is recently considered to be a promising candidate material for GBR membranes, while the in vivo osteogenic performance and antibacterial activity of pure Zn are inadequate. In this study, we developed MXene-coated Zn using an in situ self-reducing/assembling strategy to optimize the degradation, and endow antibacterial activity and osteogenesis with Zn substrates. MXene coatings exhibited excellent and stable photothermal response in the second near-infrared (NIR-II) region, enabling efficient scavenging of free radicals under NIR irradiation. The uniform and dense structure of the coating effectively blocked corrosive mediators, which significantly reduced the degradation rate of Zn substrates. This also moderated Zn ion (Zn2+) release, improving cytocompatibility and promoting the migration of HGF-1 cells, osteogenic differentiation of MC3T3-E1 cells, and the secretion of anti-inflammatory factors. Moreover, the synergistic antibacterial effect of the MXene coating, involving photothermal activity and Zn2+, demonstrated over 99 % antibacterial efficacy against both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Remarkably, in a rat subcutaneous infection model, the MXene-coated Zn eradicated nearly all bacteria at biosafe temperatures (<50 °C). The coating also promoted in vivo expression of anti-inflammatory factor IL-10, creating a favorable immune microenvironment. The MXene-coated Zn membrane offers a promising strategy for simultaneously controlling Zn degradation, enhancing antibacterial activity, and promoting bone regeneration. Additionally, it shows great potential in regulating immune responses and facilitating soft tissue healing, paving the way for Zn-based materials to be applied as barrier membranes in future clinical applications.

Key words: Zn-based GBR membranes, MXene coating, Control degradation, Photothermal antibacterial, Free radicals scavenging