Preparation and characterization of magnesium doped hydroxyapatite–gelatin nanocomposite

Abstract

Magnesium (Mg) doped hydroxyapatite (HAP)-gelatin (GEL) one-dimensional nanofibers were prepared in the aqueous GEL solution at low temperature (38 uC). The influence of GEL and Mg on morphology and crystal structure was systematically investigated. Different amount Mg doped HAP-GEL and HAP-GEL nanofibrils doped with different amounts of Mg were obtained by self-assembly along with gelatin, and pure HAP and HAP doped with Mg were sphere nanoparticles in the absence of GEL. Fourier transform infrared (FT-IR) analysis showed that chemical bonding between calcium ions of HAP and carboxyl groups of GEL molecules led to a red shift of the 1395 cm 21 band of GEL. The incorporation of Mg ions into the composite phase caused the decrease of the lattice parameters and Ca/P molar ratio in the HAP solid samples. Differential thermal analysis and thermogravimetric analysis (DTA/TG) features and FT-IR spectra of HAPGEL composite materials were very similar to those of dentine.

Organic/Inorganic bioactive materials Part III: in vitro bioactivity of gelatin/silicocarnotite hybrids

“…9 and 10. As can be seen, the spectra presented are similar to those of carbonated hydroxyapatite-protein composites, previously reported by other authors [59]. For the G/S hybrids obtained after immersion process, both the FTIR spectra (Figs.…”

Preparation and characterization of Mg-doped fluorapatite nanopowders by sol–gel method

“…This suggests that the lattice parameters of FA reduce as a result of the substitution of Ca 2+ with Mg ions in the FA lattice. On the other hand, since Mg ionic radius (0.065 nm) is smaller than that of Ca 2+ ions (0.099 nm) [25], the substitution of calcium by smaller Mg ions resulted in a contraction of the cell parameters of FA. The contraction of the cell parameters of FA as a result of increasing Mg content has also been reported by Hidouri et al [26].…”

In situ precipitation of nano-hydroxyapatite in gelatin polymatrix towards specific fluoride sorption

“…A weak sharp band at 3430 cm −1 corresponded to the stretching vibration of the lattice OH − ions and a band at 612 cm −1 was assigned to the OH bending deformation mode. The bands at 1650 and 1552 cm −1 for the sample were the absorptions of amide I and amide II, respectively [30]. The broadening band at 3430 cm −1 in the fluoride sorbed n-HAp@Gel composite is due to electrostatic adsorption between the composite and the fluoride ion [31].…”