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Biomimetic Synthesis of Needle-shaped Nano-CaCO3 Particles with L-Histidine as the Template

XIAO Yu-Peng1, ZHAO Xu1, ZHAO Li-Na1, WU Xiao-Xia2, LEI Hong1, REN Su-Xia1, WANG Zi-Chen1*   

    1. College of Chemistry, Jilin University, Changchun 130012, China;
    2. Key Laboratory of Molecular Enzymology and Engineering, Ministry of Education, Jilin University, Changchun 130021, China
  • Received:2008-07-30 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
  • Contact: WANG Zi-Chen

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Abstract: Based on the theory of biomimetic synthesis, well dispersed needle-shaped nano-CaCO3 particles with an average width of 80 nm and a ratio of diameter to length about 1∶12 were synthesized via a simple precipitation reaction of Na2CO3 with CaCl2 in the presence of L-histidine. The products were characterized by field emission scanning electron microscopy(FESEM), X-ray diffraction(XRD), fourier transform infrared spectroscopy(FTIR) and whiteness meter. The results show that needle-shaped nano-CaCO3 crystals are obtained in the presence of L-histidine. Whereas, only cubic micron CaCO3 crystals were obtained without L-histidine. Due to its nano-size, high oil-absorbed value and high whiteness, the needle-shaped nano-CaCO3 particle was expected to be used as the filler for high-grade paper products, such as carbon paper, handkerchief paper, printing paper, etc.

Key words: Needle-shaped nano-CaCO3, Biomimetic synthesis, L-Histidine, Oil-absorbed value, Whiteness

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