期刊
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 40, 期 -, 页码 55-64出版社
ELSEVIER
DOI: 10.1016/j.msec.2014.03.019
关键词
Electrophoretic deposition; Bioactive glass; Alginate; Polyvinyl alcohol; Bioactivity; Adhesion strength
资金
- China Scholarship Council (CSC) [2011629002]
- ITN EU Network GlaCERCo [264526]
- EU Marie Curie Fellowship (BIODENT issue) [PIEF-GA-2011-298295]
PVA reinforced alginate-bioactive glass (BG) composite coatings were produced on stainless steel by a single step electrophoretic deposition (EPD) process. The present paper discusses the co-deposition mechanism of the three components and presents a summary of the relevant properties of the composite coatings deposited from suspensions with different PVA concentrations. Homogeneous composite coatings with compact microstructure and increased thickness, i.e. as high as 10 mu m, were observed by scanning electron microscopy (SEM). The surface roughness of coatings with different PVA contents was slightly increased, while a significant increase of water contact angles due to PVA addition was detected and discussed. Improved adhesion strength of coatings containing different amounts of PVA was quantitatively and qualitatively confirmed by pull-off adhesion and cycled bending tests, respectively. In-vitro bioactivity tests were performed in simulated body fluid (SBF) for 0.5, 1, 2, 4, 7, and 14 days, respectively. The decomposition rate of the coatings was reduced with PVA content, and rapid hydroxyapatite forming ability of the composite coatings in SBF was confirmed by FTIR and XRD analyses. According to the results of this study, composite alginate-Bioglass (R) bioactive coatings combined with PVA are proposed as promising candidates for dental and orthopedic applications. (C) 2014 Elsevier B.V. All rights reserved.
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