Biomitic Synthenize Calcium Carbonate On Organic Matrix Templates

The biomineralization is quite different from the common mineral crystallization in nature. The mineral crystallization is regulated by the organic matrix that the biology excretes, then the organic matrix can induce the organic materials to crystalline and grow. Calcium carbonate crystals with specific morphologies and sizes can be synthesized under some organic matrix as soft-templates. In the dissertation, different soft-templates such as Bovine Serum Albumin(BSA),Cellubiose and Starch were used to regulate and control the growth progress of calcium carbonate under present conditions in our lab. The diversity of mechanisms of versatile morphologies and different polymorph of calcium carbonate were investigated. The main information is followed.(1) Based on the basic principles of biomineralization, novel CaCO₃ crystals with specific morphologies were synthesized under the matrix of BSA. The obtained composite CaCO₃ were characterized by scanning electronic microscopy(SEM),Fourier transform infrared spectroscopy (FT-IR) and measurement of conductance ratios, the results showed that the morphologies of CaCO₃ were concerned with the concentration of BSA. The possible mechanism of the interaction between BSA and CaCO₃ during the CaCO₃ formation was discussed.(2) Based on the basic principles of biomineralization, novel CaCO₃ crystals with specific morphologies were synthesized under the control of cellubiose was used as the organic matrix. The products were characterized by X-ray powder diffraction(XRD) analysis and scanning electronic microscopy(SEM). The results showed that the concentrations of cellubiose effected the morphologies and polymorphs.(3) Based on the basic principles of biomineralization, the materials of CaCO₃ with different morphologies were synthesized under the matrix of starch, and characterized by scanning electronic microscopy(SEM) and Fourier transform infrared spectroscopy (FT-IR).