均匀大颗粒球形碳酸钙的仿生合成  

Biomimetic Synthesis of Uniform Large Particles of Spherial Calcium Carbonate

作　　者：陈先勇[1] 唐琴[1] 胡卫兵[1] 

机构地区：[1]湖北民族学院化学与环境工程学院,恩施445000

出　　处：《应用化学》2009年第5期562-565,共4页Chinese Journal of Applied Chemistry

基　　金：湖北省教育厅项目(B200729005);湖北民族学院青年重点科研项目(2005LD0013);湖北省国际科技合作项目(2006CA014)

摘　　要：依据仿生矿化原理，采用难溶性CaSO4作为钙源，以柠檬酸钠为模板剂合成出了均匀大颗粒球形碳酸钙晶体，用X射线粉末衍射（XRD）分析、扫描电子显微镜（SEM）、傅立叶变换红外吸收光谱（FTIR）和热重分析等测试技术对所得碳酸钙样品进行了表征，探讨了其合成机理。研究表明，柠檬酸钠对碳酸钙的晶形具有调控作用，在柠檬酸钠质量浓度为0．9％的条件下，能合成出大小均匀、分散性好、粒度为10～15μm的大颗粒球形碳酸钙晶体。Based on the principles of biomineralization, uniform large particles of spherial calcium carbonate were prepared using sodium citrate as the template and insoluble calcium sulphate as the raw material. The obtained calcium carbonate samples were characterized by X-ray diffraction （ XRD）, Fourier transform infrared spectrometry（FTIR） , scanning electron microscopy （ SEM ） , and tbermogravimetry analysis （ TGA ）. The crystal morphology of the calcium carbonate was controlled by sodium citrate. When the concentration of the sodium citrate was O. 9% （mass fraction）, product with uniform large particles of a mean size of 10 - 15 μm and narrow size distribution and good dispersivity was synthesized. The growth mechanism of CaCO3 was also discussed.

关 键 词：硫酸钙 柠檬酸钠 仿生合成 碳酸钙 

分 类 号：O611.6[理学—无机化学]