Study on Crystallization Behavior of Hydroxyapatite Regulated by Surfactant and Different Phosphorus Sources

In this paper, hydroxyapatite (HA) was prepared by hydrothermal reaction. During the reaction, sodium dihydrogen phosphate (NaH 2 PO 4 ) and creatine phosphate disodium (Na 2 CP) were selected as inorganic phosphorus source and organic phosphorus source, respectively. Moreover, the value of Ca/P = 1.67 was retained and sodium dodecyl sulfate (SDS) was added as template to control the formation of HA. The phase, structure and morphology of the obtained particles were characterized by X-ray powder diffraction, FT-IR, and SEM, respectively. The results showed that different phosphorus supply modes directly affected the morphology and structure of the samples. Under the synergistic effect of SDS and Na 2 CP, the hollow HA particles could be prepared. At the same time, the possible formation mechanism was discussed. This method paves a way for preparation of HA crystals with special structure and function in the future.