Augmenting adhesion strength and biomimetic properties of polymeric nanocomposite coatings on titanium implants

Nano-HAp can more easily cause apatite to precipitate on the surface of Ti when combined with poly vinyl alcohol (PVA) and collagen peptide (Collg) coating. The properties of PVA include good adhesion and strong corrosion resistance. In this study, HAp reinforced with collagen peptide nanopowders and PVA nanocrystals was generated using the electrodeposition technique. The in vitro bioactivity of the HAp-Collg-PVA nanocomposite coatings performed in Kokubo's simulated bodily fluid without being subjected to an alkaline treatment. To assess the coatings bioactivity, adhesion power, and corrosion resistance, they were subjected to a variety of physical and electrochemical characterization techniques under physiological conditions. By using the techniques of fourier-infrared spectroscopy (FT-IR), x-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and atomic force microscopy (AFM), it was determined how PVA with Collg as reinforcement affected the structure of nanocomposite coating with HAp on the surface of Ti. Computational studies suggests that Collg interacts with HAp (-6.08 kcal/mol) better than with polyvinyl alcohol (-2.09 kcal/mol). The nanocomposite coatings porosity, hydrophilicity, mechanical stability and adhesion strength were also investigated. PVA and Collg combined with HAp improved bioactivity, corrosion resistance, and adhesion strength. The biomimetic properties this component in this nanocomposite offers a functional platform for promoting osseointegration and improving implant longevity.