THE EFFECT OF pH ON THE SYNTHESIS AND CHARACTERIZATION OF HYDROXYAPATITE-POLYETHYLENE GLYCOL COMPOSITES BY IN-SITU PROCESS

Abstract

Hydroxyapatite (HAp) has a structure and chemical composition similar to bone and teeth, so Hap is widely used in the biomedical field. However, Hap has the disadvantage of being brittle, so it needs to be composited with polyethylene glycol (PEG) using an in-situ method with the aim of improving the mechanical properties of Hap. X-Rays Diffraction (XRD) results show a diffraction pattern at an angle of 2θ which is in accordance with the Hap standard (ICSD #97849). Fourier-Transform infrared (FTIR) characterization showed the presence of Hap and PEG functional group vibrations. Characterization of Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) showed that the synthesis pH can be morphological and Hap ratio. Thermogravimetric Differential Analysis Thermal Analysis (TGA-DTA) analyzed that the HAP/PEG composites decreased in weight at temperatures >200°C due to the decomposition of organic compounds originating from PEG. The results of the Hap/PEG composite degradation behavior test showed that pH 10 was the optimum synthesis pH.