Abstract
We successfully developed a facile synthetic way to 3D hollow HAp microspheres. We used Ca (NO3)2and (NH4)3PO4as materials, hyperbranched Gemini surfactant (PCD) as template.We used some techniques to characterize the products,such as X-ray powder diffraction (XRD), Fourier transform infrared spectroscope (FT-IR), Scanning electron microscopy (SEM) and Thermal gravimetric analysis (TG).The effects of the Gemini surfactant concentration on the morphology and crystal degree of the samples were analyzed.We proposed a possible growth of mechanism.The product morphology could vary from rod to hollow sphere by adjusting the template concentration.When the template concentration was low,ball-like hydroxyapatite preliminary formed.With increasing the template concentration,the crystal degree of products declined. While the spherical cluster composed of numbers of flake or needle architectures were appeared. The results show that when the mass fraction of template is 0.01%,we can product uniform well-defined hollow spherical hydroxyapatite with semidiameter about 1.5μm.
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