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Open AccessFeature PaperArticle

Bioactivity Behavior Evaluation of PCL-Chitosan-Nanobaghdadite Coating on AZ91 Magnesium Alloy in Simulated Body Fluid

1
Materials Engineering Group, Pardis College, Isfahan University of Technology, Isfahan 84156-83111, Iran
2
Materials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
3
Mechanical Engineering Program, School of Science, Engineering and Technology, Pennsylvania State University, Harrisburg, Middletown, PA 17057, USA
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(3), 231; https://doi.org/10.3390/coatings10030231
Received: 8 February 2020 / Revised: 22 February 2020 / Accepted: 27 February 2020 / Published: 3 March 2020
(This article belongs to the Special Issue Recent Advances in Bioactive Coatings)
Polymer–ceramic composite coatings on magnesium-based alloys have attracted lots of attention in recent years, to control the speed of degradability and to enhance bioactivity and biocompatibility. In this study, to decrease the corrosion rate in a simulated body fluid (SBF) solution for long periods, to control degradability, and to enhance bioactivity, polycaprolactone–chitosan composite coatings with different percentages of baghdadite (0 wt.%, 3 wt.%, and 5 wt.%) were applied to an anodized AZ91 alloy. According to the results of the immersion test of the composite coating containing 3 wt.% baghdadite in a phosphate buffer solution (PBS), the corrosion rate decreased from 0.45 (for the AZ91 sample) to 0.11 mg/cm2·h after seven days of immersion. To evaluate the apatite formation capability of specimens, samples were immersed in an SBF solution. The results showed that the samples were bioactive as apatite layers formed on the surface of specimens. The composite coating containing 3 wt.% baghdadite showed the highest apatite-formation capability, with a controlled release of ions, and the lowest corrosion rate in the SBF. View Full-Text
Keywords: polycaprolactone; Mg alloy; chitosan; baghdadite; coating polycaprolactone; Mg alloy; chitosan; baghdadite; coating
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Soleymani, F.; Emadi, R.; Sadeghzade, S.; Tavangarian, F. Bioactivity Behavior Evaluation of PCL-Chitosan-Nanobaghdadite Coating on AZ91 Magnesium Alloy in Simulated Body Fluid. Coatings 2020, 10, 231.

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