用流体动力学加速试验评价等离子体电解氧化镁合金AZ31的降解性能

IF 5 3区医学 Q1 ENGINEERING, BIOMEDICAL Journal of Functional Biomaterials Pub Date : 2024-12-03 DOI:10.3390/jfb15120366

Muhammad Saqib, Kerstin Kremmer, Joerg Opitz, Michael Schneider, Natalia Beshchasna

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引用次数: 0

摘要

镁合金具有良好的生物相容性和无毒性，是一种很有前途的生物可降解植入材料。然而，其较差的耐腐蚀性限制了其在体内的应用。等离子体电解氧化（PEO）是提高镁合金耐腐蚀性能的一种有效技术。在这项研究中，我们提出了加速降解peo处理的AZ31样品使用流体动力学测试。用不同浓度的KOH和NaSiO3作为电解液制备样品。通过优化阳极氧化时间和偏置时间，提高了材料的耐蚀性。通过显微镜、SEM EDX测量以及计算质量损失和腐蚀速率对降解样品进行分析，发现在阳极氧化样品上涂覆聚合物（Resomer©LG 855 S）涂层后，其耐腐蚀性显著提高。结果表明，PEO处理是提高AZ31镁合金耐蚀性的有效途径。流体动力学试验可作为生物可降解合金在生理温度下模拟体液中的加速降解试验。聚合物涂层进一步提高了peo处理的AZ31样品的耐腐蚀性。

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Evaluation of the Degradation Properties of Plasma Electrolytically Oxidized Mg Alloy AZ31 Using Fluid Dynamic Accelerated Tests for Biodegradable Implants.

Magnesium alloys are promising biodegradable implant materials due to their excellent biocompatibility and non-toxicity. However, their poor corrosion resistance limits their application in vivo. Plasma electrolytic oxidation (PEO) is a powerful technique to improve the corrosion resistance of magnesium alloys. In this study, we present the accelerated degradation of PEO-treated AZ31 samples using a fluid dynamic test. The samples were prepared using different concentrations of KOH as an electrolyte along with NaSiO₃. The anodizing time and the biasing time were optimized to obtain the increased corrosion resistance. The analysis of the degraded samples using microscopy, SEM EDX measurements, and by calculating mass loss and corrosion rates showed a significant increase in the corrosion resistance after the polymer (Resomer© LG 855 S) coating was applied to the anodized samples. The results confirm (or convince) that PEO treatment is an effective way to improve the corrosion resistance of AZ31 magnesium alloy. The fluid dynamic test can be used as an accelerated degradation test for biodegradable alloys in simulated body fluids at a physiological temperature. The polymer coating further improves the corrosion resistance of the PEO-treated AZ31 samples.

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来源期刊

Journal of Functional Biomaterials Engineering-Biomedical Engineering

CiteScore

4.60

自引率

4.20%

发文量

226

审稿时长

11 weeks

期刊介绍： Journal of Functional Biomaterials (JFB, ISSN 2079-4983) is an international and interdisciplinary scientific journal that publishes regular research papers (articles), reviews and short communications about applications of materials for biomedical use. JFB covers subjects from chemistry, pharmacy, biology, physics over to engineering. The journal focuses on the preparation, performance and use of functional biomaterials in biomedical devices and their behaviour in physiological environments. Our aim is to encourage scientists to publish their results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Several topical special issues will be published. Scope: adhesion, adsorption, biocompatibility, biohybrid materials, bio-inert materials, biomaterials, biomedical devices, biomimetic materials, bone repair, cardiovascular devices, ceramics, composite materials, dental implants, dental materials, drug delivery systems, functional biopolymers, glasses, hyper branched polymers, molecularly imprinted polymers (MIPs), nanomedicine, nanoparticles, nanotechnology, natural materials, self-assembly smart materials, stimuli responsive materials, surface modification, tissue devices, tissue engineering, tissue-derived materials, urological devices.