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王伟强
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副教授   博士生导师   硕士生导师

性别: 男

毕业院校: 大连理工大学

学位: 博士

所在单位: 材料科学与工程学院

学科: 材料学. 生物医学工程

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A super-hydrophilic coating with a macro/micro/nano triple hierarchical structure on titanium by two-step micro-arc oxidation treatment for biomedical applications

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论文类型: 期刊论文

第一作者: Li, Yada

通讯作者: Wang, Weiqiang,Qi, Min

合写作者: Duan, Jiatong

发表时间: 2017-02-15

发表刊物: SURFACE & COATINGS TECHNOLOGY

收录刊物: SCIE、EI

卷号: 311

页面范围: 1-9

ISSN号: 0257-8972

关键字: Triple hierarchical structure; Micro-arc oxidation; Two-step treatment; Super-hydrophilicity; Apatite-inducing ability

摘要: A super-hydrophilic coating with a macro/micro/nano triple hierarchical structure was prepared on titanium surface by a two-step micro-arc oxidation (MAO) treatment consisting of macropores (100-300 mu m), microslots (3-10 mu m) and submicro/nanopores (80-200 nm). The first hierarchical structures (macropores) were formed by MAO treatment in a NaNO3 and NaOH electrolyte, and the latter two hierarchies, forming a "cortex-like" structure, were generated through a second MAO treatment in a Na2B4O7 electrolyte. The influence of the concentration of NaOH in the electrolyte and MAO electrical parameters on the macroporous structure was explored. The morphology, composition, hydrophilicity and the formation of hydroxyapatite in simulated body fluid of the two types of structure, together with the combined structure, were studied. The results suggest that NaOH enhances the corrosion ability of NaNO3, and has a major effect on the size and uniformity of macropores. The coating hydrophilicity and the formation of hydroxyapatite of the coating were determined by the second step treatment, i.e. the "cortex-like" structure. This novel triple hierarchical structure may be promising to improve the adhesion of osteoblasts to implants as well as the fixation of implants. (C) 2016 Elsevier B.V. All rights reserved.

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