Multifunctional MOF-based composite coating on Mg alloy for biodegradable orthopedic implants

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2025-05-30 Epub Date: 2025-02-18 DOI:10.1016/j.apsusc.2025.162727

Xiaopei Li , Rongguo Ke , Erli Lin , Jiacheng Liu , Dexin Chen , Song-Zhu Kure-Chu , Xiufeng Xiao

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Abstract

To facilitate the application of Magnesium (Mg) alloys as biodegradable implants, multifunctional composite coating was fabricated by plasma electrolytic oxidation (PEO) in conjunction with hydrothermal and solvothermal methods on Mg-1Zn-1Gd (ZG11) alloy. The PEO coating was used as base layer, upon which a transition layer of ZnO was deposited by hydrothermal method. Finally, a metal organic framework (MOF, ZIF-8) outermost layer was synthetized by solvothermal method. It has been found that due to the introduction of MOF layer, the corrosion resistance, biocompatibility and even wear resistance of the coating was tremendously improved, which can primarily be attributable to the sealing and self-lubricating effects of ZIF-8 and the induced formation of hydroxyapatite (HAP) during degradation in simulated body fluid (SBF). Therefore, the present study spotlights the potential of MOF layer in the realm of biomaterials and holds considerable significance for the further development of biodegradable Mg alloys.

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生物可降解骨科植入物用镁合金多功能mof基复合涂层

为了促进镁（Mg）合金作为生物可降解植入物的应用，采用等离子体电解氧化（PEO）结合水热法和溶剂热法在Mg- 1zn - 1gd （ZG11）合金表面制备了多功能复合涂层。以PEO涂层为基材，通过水热法制备ZnO过渡层。最后，采用溶剂热法合成了金属有机骨架（MOF, ZIF-8）的最外层。研究发现，由于MOF层的引入，涂层的耐腐蚀性、生物相容性甚至耐磨性都得到了极大的提高，这主要是由于ZIF-8的密封和自润滑作用以及在模拟体液（SBF）中降解过程中诱导羟基磷灰石（HAP）的形成。因此，本研究突出了MOF层在生物材料领域的潜力，对进一步开发可生物降解镁合金具有重要意义。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.