Study of biomineralization of calcium carbonate with different morphologies using gelatin as a matrix

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Journal of Beijing University of Chemical Technology ›› 2010, Vol. 37 ›› Issue (4) : 34-39.

化学与化学工程

GAN Yong;GU FuBoHAN;DongMeiWANG;ZhiHua;GUOGuangSheng

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Biomineralization of calcium carbonate, an important inorganic biomaterial, has been extensively studied. In this paper, calcium carbonate was synthesized by biomineralization using gelatin as the matrix. The structural and morphological properties of the resulting CaCO₃materials were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The effects of varying the concentration of gelatin, the concentration of calcium ions and the reaction time were investigated. The results showed that the structures of the product are controlled by the ratio of the concentration of gelatin to calcium ions. As the ratio of the concentration of gelatin to calcium ions was gradually decreased, the compact spherical CaCO₃ morphology changed to double-snail-like, spherical-like and finally loose spherical CaCO₃aggregates. At higher gelatin to calcium ion rations, vaterite was the stable phase, and the formation of CaCO₃with concave holes was accompanied by a phase transition from vaterite to calcite at lower ratios.

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GAN Yong;GU FuBoHAN;DongMeiWANG;ZhiHua;GUOGuangSheng. Study of biomineralization of calcium carbonate with different morphologies using gelatin as a matrix[J]. Journal of Beijing University of Chemical Technology, 2010, 37(4): 34-39

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Received	Revised	Published
2009-12-29	1900-01-01	2010-07-20
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2010-07-20

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