Abstract
This study presents the fabrication of a carbonate-doped hydroxyapatite/polypyrrole thin film on 304 stainless steel (CHA/PPY/304 SS) using a cyclic voltammetry electrochemical method to enhance bone fracture repair. The in-situ substitution mechanism was evaluated through estimated reaction energy, and the impact of surface modification on structural properties was examined using the Rietveld refinement method. Following the electrodeposition of CHA on PPY-coated 304 SS, a distinctive flower-like structure emerged, with average cluster and pore sizes of 3 ± 1 μm and 130 ± 10 nm, respectively. Rietveld refinement analysis revealed A-type carbonate substitution, indicated by an increase in the a parameter and a reduction in the c parameter compared to the standard. Subsequent deposition of the bilayer coating on 304 SS significantly improved adhesion strength to 10.7 ± 0.2 MPa, along with increased hydrophilicity and Vickers hardness. Notably, enhanced bioactivity was observed, evidenced by thickened nanoflake-like structures and the formation of island-like apatite deposits after immersion in simulated body fluid (SBF) for 7 days. This bilayer coating shows promise for surface modification of metallic implants and tissue engineering scaffolds.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
