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首页> 外文期刊>Chinese science bulletin >Surface nanostructures orienting self-protection of an orthodontic nickel-titanium shape memory alloys wire
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Surface nanostructures orienting self-protection of an orthodontic nickel-titanium shape memory alloys wire

机译：正畸镍钛形状记忆合金丝的定向自保护的表面纳米结构

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摘要

Shape memory alloys (SMA) have been applied to a wide variety of applications in a number of different fields such as aeronautical applications, sensors/actuators, medical sciences as well as orthodontics. It is a hot topic to enhance the anti-corrosion ability of orthodontic wires for clinical applications. In this letter, a very nice fractal structure, micro-domains with identical nanometer sized grooves, was obtained on the surfaces of the orthodontic wires with an oxygen plasma and acid corrosion. The concave parts of the grooves were dominated by titanium and convex parts were the same as the bulk wires. The micro-nano fractal structure generated a hydrophobic surface with the largest contact angle to water being about 157 deg . The titanium dominated nanolayer and the hydrophobicity of the surface resulted in jointly the great improvement of the anti-corrosion ability of the orthodontic wires. Because the fractal structures of the wires were formed automatically when they immersed in acidic environment, hence, the self-protection of the oxygen plasma-treated orthodontic wires in acidic environment indicates their potential applications in orthodontics, and should be also inspirable for other applications of SMA materials.
机译：形状记忆合金（SMA）已在许多不同领域中被广泛应用，例如航空应用，传感器/执行器，医学和正畸。增强正畸线在临床应用中的防腐能力是一个热门话题。在这封信中，在具有氧等离子体和酸腐蚀的正畸导线表面上获得了非常好的分形结构，即具有相同纳米尺寸凹槽的微区。凹槽的凹入部分以钛为主，凸出部分与散装线相同。微纳米分形结构产生疏水表面，其与水的最大接触角约为157度。钛为主的纳米层和表面的疏水性共同导致正畸线材的抗腐蚀能力大大提高。由于导线的分形结构是在浸入酸性环境时自动形成的，因此，经过氧等离子体处理的正畸导线在酸性环境中的自我保护表明它们在正畸中的潜在应用，并且对于其他牙髓治疗应用也应具有启发性SMA材料。

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