Octacalcium phosphate fiber synthesized by homogeneous precipitation method |
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| Authors: | Xiaojun Wang Liming Fang Xiong Lu Yaoming Zhao |
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| Affiliation: | 1.School of Materials Science and Engineering,South China University of Technology,Guangzhou,China;2.National Engineering Research Center for Human Tissue Restoration and Function Reconstruction,South China University of Technology,Guangzhou,China;3.Key Lab of Advanced Technologies of Materials, Ministry of Education,Southwest Jiaotong University,Chengdu,China |
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| Abstract: | Calcium phosphate fiber was synthesized by homogeneous precipitation method using urea as precipitation agent. Effects of
the reactant concentration and hydrothermal temperature on the calcium phosphate morphology and composition were studied using
SEM, FTIR and XRD. It is found that fine octacalcium phosphate(OCP)fiber can be synthesized when the reactant concentrations
are 0.167 mol/L for Ca(NO3)2, 0.1 mol/L for (NH4)2HPO4, and 0.6–0.7 mol/L for (NH2)2CO, respectively, with the initial reactant solution pH value around 2.2, hydrothermal temperature 90 °C and termination reaction
at pH value around 5.0. At very low urea concentration, the product size distribution is highly inhomogeneous, however, at
an excessively high concentration the product becomes larger and shorter and a mixture of OCP and hydroxyapatite (HA). Increasing
the hydrothermal temperature is favorable to the fast precipitation of OCP, higher productivity and finer product. |
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