Preparation and characterization of chitosan and hydroxyapatite composite

Chitosan and hydroxyapatite (HAp) composites were prepared at different ratios (60% chitosan & 40% HAp, 50% chitosan & 50% HAp, 40% chitosan & 60% HAp). The mixtures are dissolved in a 2% acetic acid solution and heated to about 60°C-70°C with continuous stirring for about 1 hour. After that, the solutions are naturally dried on heat-sealing paper placed above a glass sheet. After about 24 hours, chitosan and hydroxyapatite composite films are prepared.
Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that Hydroxyapatite is mainly found at lower wave numbers in the range 400–600 cm-1. X-ray diffraction patterns were showed, the crystalline properties of the composites increase with Hydroxyapatite. Differential Thermal Gravimetry (DTG) analysis of the composites indicated that the material is thermally stable up to 300°C.
This paper aims to review the literature concerning chitosan-hydroxyapatite composites for bone restoration and discuss the primary methods of preparation and mechanical properties of these materials.