[en] The advantage of using bioceramic particles coated on porous three-dimensional structures is still
unexplored in the purpose of improving the osteoinduction of hybrid metallic scaffold implants in vivo. In this study, we evaluate electrophoretic deposition (EPD) to coat porous Ti6Al4V scaffolds with hydroxyapatite (HA). Scaffolds were shaped in different open structures with a horizontal shift in fiber stacking. They were produced using three-dimensional fiber deposition method and were coated by EPD with HA powder (d10 = 1.7, d50 = 5.7 and d90 = 18 lm) suspended in ethanol or butanol at different concentration, DC voltage, and time. A composite HA–alginate was also used to coat the scaffolds. Alginate was used as a binder, and the coating properties (homogeneity, thickness, cracks, continuity, etc.) were compared to coatings obtained from pure HA suspensions. Voltage and time of deposition effects were studied between 10 and 140 V and 10 and 120 s, respectively. Coating thickness and density with respect to the depth of the porous structure
were studied by observing cross sections using scanning electron microscopy and image processing analysis. HA–alginate combination resulted in a homogeneous and deeper dense layer of HA. This work also points to the characteristics of HA–alginate composite as a superior alternative to pure HA coating which needs an appropriate thermal treatment for adequate substrate adhesion.
Disciplines :
Chemistry
Author, co-author :
Ozhukil Kollath, Vinayaraj; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Chen, Qiang; University of Erlangen-Nuremberg - Germany > Department of Materials Science and Engineering
Mullens, Steven; Flemish Institute for Technological Research-VITO > Sustainable Materials Management
Luyten, Jan; Flemish Institute for Technological Research-VITO > Sustainable Materials Management
Traina, Karl ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Boccaccini, Aldo R; University of Erlangen-Nuremberg - Germany > Department of Materials Science and Engineering
Cloots, Rudi ; Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT
Language :
English
Title :
Electrophoretic deposition of hydroxyapatite and hydroxyapatite– alginate on rapid prototyped 3D Ti6Al4V scaffolds
Publication date :
2016
Journal title :
Journal of Materials Science
ISSN :
0022-2461
eISSN :
1573-4803
Publisher :
Springer Science & Business Media B.V., Dordrecht, Netherlands
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