Indexed by:期刊论文
Date of Publication:2017-02-15
Journal:SURFACE & COATINGS TECHNOLOGY
Included Journals:SCIE、EI
Volume:311
Page Number:1-9
ISSN No.:0257-8972
Key Words:Triple hierarchical structure; Micro-arc oxidation; Two-step treatment; Super-hydrophilicity; Apatite-inducing ability
Abstract: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.
Associate Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:School of Materials Science & Engineering
Discipline:Materials Science. Biomedical Engineering
Business Address:Room 224
School of Materials Science and Engineering,
Dalian University of Technology,
Liaoning 116024,
P. R. of China
Contact Information:15641198386
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