Effect of pH and carbon nanotube content on the corrosion behavior of electrophoretically deposited chitosan–hydroxyapatite–carbon nanotube composite coatings

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

“…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 . 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 . FTIR spectra of chitosan/BG/lawsone and ML coatings exhibit bands at 2030 cm −1 and 2160 cm −1 , which are assigned to the aromatic ring and thiocyanate group of lawsone, respectively .…”

“…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. 43,44 FTIR spectra of chitosan/BG/lawsone and ML coatings exhibit bands at 2030 cm −1 and 2160 cm −1 , which are assigned to the aromatic ring and thiocyanate group of lawsone, respectively. 45 However, the effect of lawsone was not clearly observed in the FTIR spectra of ML coatings, possibly due to the hydrogen bonding between hydroxyl groups of lawsone and chitosan, which may have caused the overlapping of chitosan and lawsone bands.…”

Curcumin-Containing Orthopedic Implant Coatings Deposited on Poly-Ether-Ether-Ketone/Bioactive Glass/Hexagonal Boron Nitride Layers by Electrophoretic Deposition

“…The broad band at about 1022 cm −1 may have appeared because of the overlap of the C-O bond in chitosan and the bond corresponding to network modifiers in the glass structure [25,49,51]. Furthermore, the peak found at 1408 cm -1 is assigned to the asymmetrical bending in C-H, and the peak at about 1570 cm −1 is attributed to N-H bonding vibration of chitosan [52,53]. The relevant bands for curcumin in multilayer coatings were: C-H band at 714, 806 and 786 cm -1 , -C-O-band at 1603 and 1624 cm −1 , and the ethylene group at 1510 cm −1 [33].…”

Electrophoretic deposition of chitosan coatings on the Ti15Mo biomedical alloy from a citric acid solution

“…11,33,35,36 In the FTIR spectra for both chitosan powder and coating there are a presence of the band at 1651 cm À1 derived from stretching vibration of C]O amide group (amide I band), band at 1573 cm À1 corresponding to the covalent vibration of N-H at -NH 2 group and band at 1558 cm À1 which can be attributed to bending vibrations of the NH group of the amide. 11,[33][34][35][36][37][38][39] In the FTIR spectrum registered for the chitosan coating, the additional bands at 1713 cm À1 , 1401 cm À1 and 1200 cm À1 resulting from the vibrations of C] O, C-O and C-O-C bonds derived from citric acid, are visible. [40][41][42] These results indicate that on the Ti15Mo alloy surface besides chitosan, also citric acid molecules were deposited.…”