Laser-zoned treatment of magnesium surfaces with predictable degradation applications

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131300

Shuo Liu, Peng Chen, Tai Yang, Chaoqun Xia, Chunyong Liang, Ning Liu

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Abstract

Magnesium metal is a promising material for medical applications due to its biocompatibility and similar modulus of elasticity to human bone. However, its complex corrosion process must be addressed before it can be used clinically to match post-implantation tissue repair. This study aims to regulate material degradation by utilizing laser surface treatment. The surface of pure magnesium was modified using nanosecond and femtosecond laser methods to create various micro-nanostructures, such as chain, streak, column, and groove structures. Surface roughness and wettability tests revealed that the groove structures had higher roughness values. All structures exhibited hydrophilicity, but the femtosecond laser-generated structures were more hydrophilic. Electrochemical tests and immersion experiments demonstrated that femtosecond laser modification significantly improved the corrosion resistance of magnesium metal compared to polished samples. Cytotoxicity experiments showed that the laser-treated magnesium was not cytotoxic. Based on the results, we constructed various structures on the magnesium rods in different regions. As a result, the rods exhibited multi-stage biodegradation behavior in simulated body fluids (SBF). This study presents a novel approach to controlling the degradation sequence of medical metals.

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可预测降解应用的镁表面激光分区处理

金属镁具有生物相容性和与人体骨骼相似的弹性模量，是一种很有前途的医疗应用材料。然而，在将其用于临床匹配植入后组织修复之前，必须解决其复杂的腐蚀过程。本研究旨在利用激光表面处理技术调节材料降解。采用纳秒和飞秒激光方法对纯镁表面进行改性，以形成各种微纳米结构，如链状、条状、柱状和槽状结构。表面粗糙度和润湿性测试表明，沟槽结构的粗糙度值较高。所有结构都具有亲水性，但飞秒激光生成的结构亲水性更强。电化学测试和浸泡实验表明，与抛光样品相比，飞秒激光改性显著提高了金属镁的耐腐蚀性。细胞毒性实验表明，激光处理过的镁没有细胞毒性。根据实验结果，我们在镁棒的不同区域构建了各种结构。因此，镁棒在模拟体液（SBF）中表现出多级生物降解行为。这项研究提出了一种控制医用金属降解顺序的新方法。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.