Abstract:

BACKGROUND: Nanosized hydroxyapatite with different size and morphology has different surface performance and bioactivity. Different sized nanohydroxyapatite was synthesized via surface modification of hydroxyapatite; by this method, the application of nanosized hydroxyapatite can be extended.
OBJECTIVE: To analyze the effect of experimental parameters, such as type of organic modifiers and pH value, etc. on the size of hydroxyapatite synthesized by hydrothermal method.
METHODS: Hydroxyapatite with different sizes was synthesized starting from phosphoric acid and calcium nitrate and using D-sorbitol, sodium polyacrylate and Tween 80 as organic modifiers at different pH values.
RESULTS AND CONCLUSION: In the absence of organic modifier, the size of hydroxyzpatite was decreased rapidly with the increase in pH values. The presence of sodium polyacrylate was beneficial to the formation of small-size hydroxapatite. The addition of D-sorbitol favored the formation of large-size hydroxyapatite. The presence of Tween 80 decreased the size of hydroxyapatite in some extent.