Preparation, corrosion resistance and hemocompatibility of the superhydrophobic TiO2 coatings on biomedical Ti-6Al-4V alloys
Preparation, corrosion resistance and hemocompatibility of the superhydrophobic TiO2 coatings on biomedical Ti-6Al-4V alloys
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DOI：
10.1016/j.apsusc.2015.04.075
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发表时间：
2015-08-30
影响因子：
6.7
通讯作者：
Liu, H. Y.
中科院分区：
文献类型：
--
作者：
Jiang, J. Y.;Xu, J. L.;Liu, H. Y.
本文采用微弧氧化（MAO）技术和随后的超疏水处理技术在医用Ti-6Al-4V合金表面制备了超疏水TiO2涂层。研究了MAO和超疏水样品的表面形貌、表面粗糙度、水接触角、耐腐蚀性和血液相容性。结果表明：Ti-6Al-4V合金表面形成单一锐钛矿型TiO2涂层，具有粗糙多孔的微米级结构；在疏水处理过程中，通过自组装反应将低表面能膜接枝到TiO2涂层表面，形成了水接触角为153.39的超疏水表面。结果表明，超疏水样品的耐蚀性比未涂覆的Ti-6Al-4V合金提高了一个数量级。通过MAO处理和随后的超疏水处理，Ti-6Al-4V合金的溶血率和血小板粘附特性也得到了很大的改善。特别是在超疏水样品的表面没有观察到血小板。因此，具有更高血液相容性的Ti-6Al-4V合金的超疏水TiO2涂层在其潜在的血液接触应用中具有很大的前景。(C) 2015 Elsevier B.V.版权所有
In this paper the micro-arc oxidation (MAO) technique and subsequent superhydrophobic treatment were applied to fabricate the superhydrophobic TiO2 coatings on biomedical Ti-6Al-4V alloys. The surface morphology, surface roughness, water contact angle, corrosion resistance and hemocompatibility of the MAO and superhydrophobic samples were investigated. The results showed that the single anatase TiO2 coating was formed on the surface Ti-6Al-4V alloy with rough and porous micrometer-scale structure. The low surface energy film was grafted on the surface of the TiO2 coating by self-assembling reaction during the hydrophobic treatment process, which resulted in the formation of superhydrophobic surfaces with the water contact angle of 153.39. It was found that the corrosion resistance of the superhydrophobic samples increased by one order of magnitude compared to those of the uncoated Ti-6Al-4V alloys. The hemolysis ratio and platelets adhesion characteristics of the Ti-6Al-4V alloys were also improved greatly through the MAO treatment and subsequent superhydrophobic treatment. Especially, no platelet could be observed on the surface of the superhydrophobic samples. Therefore, the superhydrophobic TiO2 coatings of Ti-6Al-4V alloys with higher hemocompatibility would show great promise in their potential blood-contacting applications. (C) 2015 Elsevier B.V. All rights reserved.