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首页> 外文期刊>Coatings >Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy
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Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

机译：Ti合金对杂交和双层MWCNTS-羟基磷灰石涂层的性质比较

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Carbon nanotubes are proposed for reinforcement of the hydroxyapatite coatings to improve their adhesion, resistance to mechanical loads, biocompatibility, bioactivity, corrosion resistance, and antibacterial protection. So far, research has shown that all these properties are highly susceptible to the composition and microstructure of coatings. The present research is aimed at studies of multi-wall carbon nanotubes in three different combinations: multi-wall carbon nanotubes layer, bilayer coating composed of multi-wall carbon nanotubes deposited on nanohydroxyapatite deposit, and hybrid coating comprised of simultaneously deposited nanohydroxyapatite, multi-wall carbon nanotubes, nanosilver, and nanocopper. The electrophoretic deposition method was applied for the fabrication of the coatings. Atomic force microscopy, scanning electron microscopy and X-ray electron diffraction spectroscopy, and measurements of water contact angle were applied to study the chemical and phase composition, roughness, adhesion strength and wettability of the coatings. The results show that the pure multi-wall carbon nanotubes layer possesses the best adhesion strength, mechanical properties, and biocompatibility. Such behavior may be attributed to the applied deposition method, resulting in the high hardness of the coating and high adhesion of carbon nanotubes to the substrate. On the other hand, bilayer coating, and hybrid coating demonstrated insufficient properties, which could be the reason for the presence of soft porous hydroxyapatite and some agglomerates of nanometals in prepared coatings.
机译：提出碳纳米管用于加强羟基磷灰石涂层，以改善其粘附，耐机电载荷，生物相容性，生物活性，耐腐蚀性和抗菌保护。到目前为止，研究表明，所有这些性质都是高度易受涂层组成和微观结构的影响。本研究旨在研究三种不同组合的多壁碳纳米管：多壁碳纳米管层，由沉积在纳米羟基磷灰石沉积物上的多壁碳纳米管组成的双层涂层，并由同时沉积的纳米羟基磷灰石，多重壁碳纳米管，纳米玻璃和纳米孔。施加电泳沉积方法用于制造涂层。应用原子力显微镜，扫描电子显微镜和X射线电子衍射光谱和水接触角的测量，用于研究涂层的化学和相位成分，粗糙度，粘附强度和润湿性。结果表明，纯多壁碳纳米管层具有最佳粘合强度，机械性能和生物相容性。这种行为可能归因于所施加的沉积方法，导致涂层的高硬度和对基板的碳纳米管的高粘附性。另一方面，双层涂层和杂化涂层表明了性质不足，这可能是在制备涂层中存在软多孔羟基磷灰石和一些纳米附聚物的原因。

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