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首页> 外文期刊>Materials Letters >Effect of hydroxyapatite (HA) nanoparticles shape on biodegradation of Mg/HA nanocomposites processed by high shear solidification/equal channel angular extrusion route
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Effect of hydroxyapatite (HA) nanoparticles shape on biodegradation of Mg/HA nanocomposites processed by high shear solidification/equal channel angular extrusion route

机译：羟基磷灰石（HA）纳米颗粒形状对高剪切凝固/等通道角挤压路径下Mg / HA纳米复合材料生物降解的影响

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摘要

This work was carried out to investigate the effect of HA nanoparticle shape on the biodegradation behaviour of a magnesium-hydroxyapatite (Mg-2Zn-0.2Mn-0.5Ca/1HA, wt%) nanocomposite fabricated by a novel route which combines high shear solidification (HSS) and equal channel angular extrusion (ECAE) techniques. Two common shapes of HA nanoparticles, i.e. spherical and needle-like were selected with an average equivalent diameter of 40 nm. The biodegradation rate of the nanocomposite in HBSS Hanks' Balanced Salt Solution was assessed using electrochemical corrosion and immersion test. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to characterize the surface microstructure, biodegradation morphology and biodegradation products. Experimental results showed that Mg/HA composite with spherical HA nanoparticles exhibited a significantly smaller biodegradation rate of 0.6 +/- 0.05 mm/year, compared to 9.41 +/- 2.53 mm/year for the nanocomposite with needle HA nanoparticles. (C) 2020 Elsevier B.V. All rights reserved.
机译：进行这项工作以研究HA纳米颗粒形状对通过结合高剪切固化的新途径制备的镁-羟基磷灰石（Mg-2Zn-0.2Mn-0.5Ca / 1HA，wt％）纳米复合材料的生物降解行为的影响。 HSS）和等通道角挤压（ECAE）技术。选择两种常见形状的HA纳米颗粒，即球形和针状，平均等效直径为40 nm。使用电化学腐蚀和浸没测试评估HBSS Hanks平衡盐溶液中纳米复合材料的生物降解率。扫描电子显微镜（SEM）和能量色散光谱（EDS）用于表征表面微观结构，生物降解形态和生物降解产物。实验结果表明，具有球形HA纳米颗粒的Mg / HA复合材料的生物降解速率明显更低，为0.6 +/- 0.05 mm /年，而具有针状HA纳米颗粒的纳米复合材料的生物降解速率为9.41 +/- 2.53 mm /年。 （C）2020 Elsevier B.V.保留所有权利。

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  • 来源
    《Materials Letters》 |2020年第may15期|127541.1-127541.6|共6页
  • 作者

  • 作者单位

    Brunel Univ London BCAST Inst Mat & Mfg London UB8 3PH England|Univ Cent Florida Coll Med Dept Internal Med Biionix Bion Mat Implants & Interfaces Cluster Orlando FL 32827 USA|Univ Cent Florida Dept Mat Sci & Engn Orlando FL 32816 USA;

    Brunel Univ London BCAST Inst Mat & Mfg London UB8 3PH England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biodegradable magnesium alloys; Nanocomposite; Hydroxyapatite; Bone implant;

    机译：可生物降解的镁合金;纳米复合材料羟基磷灰石;骨植入物;

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