Surface modification of calcium hydroxyapatite with pyrophosphoric acid.

@article{Tanaka2004SurfaceMO,
  title={Surface modification of calcium hydroxyapatite with pyrophosphoric acid.},
  author={Hidekazu Tanaka and Masakazu Futaoka and Ryozi Hino},
  journal={Journal of colloid and interface science},
  year={2004},
  volume={269 2},
  pages={358-63}
}
The surface of synthetic colloidal calcium hydroxyapatite (Ca(10)(PO(4))(6)(OH)(2); CaHap) was treated with pyrophosphoric acid (H(4)P(2)O(7); PP) in acetone and the materials were characterized by XRD, thermal analysis, N(2) adsorption, TEM, and FTIR. No remarkable change in XRD patterns or in particle morphology by the modification was observed. The additional amount of PO(4) of CaHap was increased with an increase in PP concentration. The Ca/P molar ratio of CaHap was decreased from 1.62 to… CONTINUE READING