Enhancing control over the degradation behavior of zinc alloy via MOF coating

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2024-11-13 DOI:10.1007/s40843-024-3106-1

Rongsheng Deng (, ), Yu Peng (, ), Qing Meng (, ), Zichun Jiang (, ), Qinglin Fang (, ), Yingzhi Chen (, ), Tong Li (, ), Kuo Men (, ), Bailiang Wang (, ), Luning Wang (, )

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引用次数: 0

Abstract

Zinc and its alloys provide a scalable alternative to the list of biodegradable metals due to its moderate degradation rates and biocompatible degradation products. However, one of the challenges impeding their clinical applications is the uncontrollable and unstable interfacial reactions between zinc implants and the corrosive media. In this study, we report a facile synthesis of metal–organic framework (MOF) nanocrystal coating with tunable thickness on the high-strength Zn-0.8Li alloy matrix for controlled corrosion. The as-obtained dense and uniform MOF nanocrystals form a strong connection with the zinc matrix via coordination bond so as to maintain the mechanical properties, and meantime provide highly rough surfaces exhibiting tunable wettability. The varied MOF coating thus regulate the interface structure between the zinc matrix and corrosive media to control the degradation behavior. Excellent antibacterial activity and biocompatibility are also achieved because of the unique topology morphologies, surface superhydrophilicity, as well as the dynamic Zn²⁺ release. This study sheds valuable lights on the design of MOF-functionalized metal implants for practical use and also triggers extensive applications of MOF in biomaterials.

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通过 MOF 涂层加强对锌合金降解行为的控制

锌及其合金具有适中的降解率和生物相容性降解产物，是可生物降解金属清单中的一种可扩展替代品。然而，阻碍其临床应用的挑战之一是锌植入物与腐蚀性介质之间不可控且不稳定的界面反应。在本研究中，我们报告了在高强度 Zn-0.8Li 合金基体上轻松合成厚度可调的金属有机框架（MOF）纳米晶体涂层以控制腐蚀的方法。所获得的致密均匀的 MOF 纳米晶体通过配位键与锌基体形成了牢固的连接，从而保持了机械性能，同时还提供了具有可调润湿性的高粗糙表面。不同的 MOF 涂层可以调节锌基体与腐蚀性介质之间的界面结构，从而控制降解行为。由于独特的拓扑形态、表面超亲水性以及动态 Zn2+ 释放，还实现了优异的抗菌活性和生物相容性。这项研究为设计实用的 MOF 功能化金属植入物提供了宝贵的启示，同时也引发了 MOF 在生物材料中的广泛应用。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.