静电纺PCL/HA包覆镁生物复合材料的腐蚀疲劳行为

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-05-04 DOI:10.1080/02670844.2023.2239028

M. Shamsi, M. Sedighi

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引用次数: 1

摘要

摘要：镁植入物容易因体内腐蚀和循环载荷而过早失效。复合纤维涂层可有效减少镁材料的腐蚀。在本研究中，制备了Mg/HA复合材料，并进行了微观和机械表征。然后用PCL/2.5%HA纤维对样品进行电纺，并通过浸渍试验探索腐蚀行为。最后，进行了空气和SBF环境下的旋转弯曲疲劳试验。根据研究结果，Mg/2.5%HA和涂层Mg/2.5%HA样品可以在60 MPa。与纯Mg相比，Mg/2.5%HA具有更好的耐腐蚀性和耐腐蚀疲劳性。此外，由于聚合物支架、被动保护层和磷灰石吸附能力，PCL/2.5%HA纤维涂层可以提高Mg/2.5%HA的耐腐蚀疲劳性能。结果表明，用PCL/2.5%HA纤维涂覆的Mg/2.5%HA复合材料有可能适用于骨科生物材料。

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Corrosion fatigue behaviour of electrospun PCL/HA coated magnesium biocomposites

ABSTRACT Magnesium implants are susceptible to premature failure due to corrosion and cyclic loading within the body. Composite fibre coatings are effective at reducing corrosion in magnesium materials. In this study, an Mg/HA composite was fabricated, and microscopic and mechanical characterisation was performed. The samples were then electrospun with PCL/2.5%HA fibres, and corrosion behaviour was explored by immersion tests. Finally, rotary bending fatigue tests in air and SBF environments were conducted. According to the findings, the Mg/2.5%HA and coated Mg/2.5%HA samples can withstand more than 1 million cycles under 60 MPa. Compared to pure Mg, Mg/2.5%HA has better corrosion and corrosion fatigue resistance. Furthermore, a PCL/2.5%HA fibre coating can increase the corrosion fatigue resistance of Mg/2.5%HA as a result of the polymer scaffold, passive protective layer, and apatite adsorption capability. Results suggest that Mg/2.5%HA composites coated with PCL/2.5%HA fibres are potentially suitable for use in orthopaedic biomaterials.

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.