碱热预处理后镍钛合金表面聚己内酯涂层的附着力和耐蚀性

IF 1.6 Q4 ENGINEERING, BIOMEDICAL
Zhihui Zhang, Yanan Yang, Yunting Guo, Pengwei Sha, Zezhou Xu, Zhenglei Yu, Jiashun Si, Zhengao Zhang, Jia Guo, Yifan Chen
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引用次数: 1

摘要

选择性激光熔化镍钛合金(SLM-NiTi)可以精确控制样品成型结构的尺寸,由于其特殊的超弹性和形状记忆效应而受到广泛关注。然而,SLM-NiTi合金的生物惰性和较差的耐腐蚀性限制了其作为生物医学植入材料的广泛应用。本研究采用浸拔法在SLM-NiTi合金上制备聚己内酯(PCL)涂层,考察碱热预处理对PCL涂层形貌、附着力、耐腐蚀性、长期稳定性和生物矿化的影响。结果表明:PCL涂层可以显著提高SLM-NiTi合金的性能,碱热预处理后的PCL涂层具有更高的附着力(从1,747 mN增加到2,498 mN)和更低的腐蚀电流密度(与单独的PCL涂层相比降低了约一个数量级)。此外,涂层的稳定性、生物矿化和生物相容性也得到了进一步的提高。因此,碱热处理pcl包覆SLM-NiTi合金由于其优越的性能在植入体中具有良好的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Adhesion and corrosion resistance of polycaprolactone coating on NiTi alloy surface after alkali heat pretreatment

Adhesion and corrosion resistance of polycaprolactone coating on NiTi alloy surface after alkali heat pretreatment

Selective laser melting of nickel-titanium alloy (SLM-NiTi) can precisely control the size of the sample molding structure and has attracted extensive attention due to its special superelasticity and shape memory effect. However, the biological inertness and poor corrosion resistance of SLM-NiTi alloy limit their wide application as biomedical implant materials. In this study, polycaprolactone (PCL) coating was prepared on SLM-NiTi alloy by dipping and pulling method, and the effects of alkali heat pretreatment on the morphology, adhesion, corrosion resistance, long-term stability and biomineralisation of the PCL coatings were investigated. The results showed that PCL coating can substantially improve the performance of SLM-NiTi alloy, and the PCL coating after alkali heat pretreatment has higher adhesion (increased from 1,747 to 2,498 mN) and lower corrosion current density (reduced by about an order of magnitude compared to PCL coating alone). In addition, the necessary stability, biomineralisation and biocompatibility ability of coatings were also further improved. Therefore, the alkali heat pretreated PCL-coated SLM-NiTi alloy has good application prospects in implants due to its superior properties.

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来源期刊
Biosurface and Biotribology
Biosurface and Biotribology Engineering-Mechanical Engineering
CiteScore
1.70
自引率
0.00%
发文量
27
审稿时长
11 weeks
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