Synthesis, Characterization and In vitro Bioactivity of Chitosan- Hydroxyapatite Composite Doped with Magnesium

I. Abdullahi, I. Zainol


This work reports the synthesis, characterization and in vitro response of a novel chitosan-hydroxyapatite composite doped with magnesium. Hydroxyapatite (HA), magnesium doped HA, chitosan-hydroxyapatite composite and the novel magnesium doped chitosan-hydroxyapatite composite were synthesised using co-precipitation method. The effects of magnesium and chitosan incorporation on the structural properties of the samples were studied by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Bioactivity studies of the samples in simulated body fluid (SBF)  was carried out. The incorporation of magnesium and chitosan into the lattice of the HA reduced the crystallinity and crystallite size of the HA. The chemical composition of the novel magnesium doped chitosan-HA composite was found to have resemblance to that of bone mineral. The novel material showed good bioactivity in SBF. 

Keywords: hydroxyapatite, chitosan, composite, bioactivity, antimicrobial

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Chemical Society of Nigeria