Electrophoretic deposition of graphene oxide reinforced chitosan–hydroxyapatite nanocomposite coatings on Ti substrate

Abstract

Electrophoretic deposition (EPD) is a facile and feasible technique to prepare functional nanocomposite coatings for application in orthopedic-related implants. In this work, a ternary graphene oxide-chitosan-hydroxyapatite (GO-CS-HA) composite coating on Ti substrate was successfully fabricated by EPD. Coating microstructure and morphologies were investigated by scanning electron microscopy, contact angle test, Raman spectroscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis. It was found GO-CS surface were uniformly decorated by HA nanoparticles. The potentiodynamic polarization test in simulated body fluid indicated that the GO-CS-HA coatings could provide effective protection of Ti substrate from corrosion. This ternary composite coating also exhibited good biocompatibility during incubation with MG63 cells. In addition, the nanocomposite coatings could decrease the attachment of Staphylococcus aureus.

Electrophoretic deposition of lawsone loaded bioactive glass (BG)/chitosan composite on polyetheretherketone (PEEK)/BG layers as antibacterial and bioactive coating

“…Moreover, SEM images of the cross section show that chitosan/BG/lawsone coating developed a uniform thickness (8–10 μm). However, slight variations in the coating thicknesses and homogeneity have been observed among different researchers, as well as in the current study, which is possibly due to the difference in particle size and concentration of BG along with the variations in EPD parameters …”

“…The characteristic peaks of BG were determined in ML and PEEK/BG coatings at 460–500 cm −1 (bending vibration of Si‐O‐Si) and at 920–1030 cm −1 (stretching vibration of network modifiers in the glass structure). The characteristic peaks of chitosan were determined in ML and chitosan/BG/lawsone coatings such as stretching vibration of the CO bond in chitosan at 1080 cm −1 . The broad band around 1022 cm −1 may have appeared due to the overlapping of the CO bond in chitosan and the network modifiers in the glass structure .…”

“…However, slight variations in the coating thicknesses and homogeneity have been observed among different researchers, as well as in the current study, which is possibly due to the difference in particle size and concentration of BG along with the variations in EPD parameters. 4,23,30,41,42 EPD of chitosan/BG/lawsone on PEEK/BG layer. After optimizing the EPD process of chitosan/BG/lawsone on 316 L SS, similar EPD conditions were applied to obtain chitosan/ BG/lawsone coatings on PEEK/BG layers.…”

“…The characteristic peaks of chitosan were determined in ML and chitosan/BG/lawsone coatings such as stretching vibration of the C O bond in chitosan at 1080 cm −1 . 41,42 The broad band around 1022 cm −1 may have appeared due to the overlapping of the C O bond in chitosan and the network modifiers in the glass structure. 2 Moreover, the band at about 1408 cm −1 is assigned to the asymmetrical bending in C H and the band around 1570 cm −1 is ascribed to the N H bonding vibration of chitosan.…”

From bulk to cellular structures: A review on ceramic/graphene filler composites

“…Cheng's group also developed by EPD ternary hybrid coatings of GO (up to 1.5 wt%)/hyaluronic acid (HY)/HA [99], GO/silk fibroin(SF)/HA [101] and GO (up to 1.7 wt.%)/chitosan(CHS)/HA [102] over Ti substrates. In these ternary systems, SF, HY and CHS act as charging additive and dispersion agent during EPD.…”