Fig. 3.

Characterization of ONFC and its individual components with A FTIR, B XRD, and C TGA. A Shows the appearance of the amide groups i.e. 1650 and 1540 cm⁻¹ in the FTIR spectra of the ONFC indicating that the PCL chains were chemically bonded to gelatin leading to introduction of functional group such as NH₂, COOH in the nanofibres. The other components doesnot provides significant IR peaks in the ONFC spectra probably due to its limited incorporation in the composite coating. B Shows X-ray diffractogram of osteogenic nanofibrous coating (ONFC) and its additives. Shifting of diffraction peaks to higher angles for ONFC is seen suggesting the formation of different crystalline structure. C Shows the TGA curves of osteogenic nanofibrous coating (ONFC) and its additives. The thermogram of ONFC shows a distinct two-stage degradation profile confirming the grafting of all components and formation of sterocomplex fibres