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Citation: WU Gang, CHEN Long, XIE An-Jian, SHEN Yu-Hua, LI Shi-Kuo, ZHANG Qing-Feng. Biomimetic Synthesis of CaCO₃ Nanoparticles in N,O-Carboxymethyl Chitosan Solution[J]. Chinese Journal of Applied Chemistry, ;2006, 23(10): 1076-1080. shu

Biomimetic Synthesis of CaCO₃ Nanoparticles in N,O-Carboxymethyl Chitosan Solution

1.
School of Chemistry and Chemical Engineering, Anhui University, School of Chemistry and Chemical Engineering & Key Laboratory of Environment-friendly Polymer Materials of Anhui Province, Hefei 230039

Corresponding author: SHEN Yu-Hua,
Received Date: 27 November 2005
Available Online: 8 April 2006
Fund Project: 国家自然科学基金(20371001,20471001) (20371001,20471001)安徽省教育厅高校学术技术带头人资助项目(2005hbz03) (2005hbz03)

N,O-Carboxymethyl chitosan(CMC)(M_w=3.08×10⁵) with 1.84% carboxymethyl substitution was synthesized and used as an organic matrix to induce and control the nucleation and growth of CaCO₃ crystals in aqueous solution,and the obtained CaCO₃ particles were characterized by FT-IR,UV,TEM and XRD.The results show that CMCs regulated the formation of the particles and led to vaterite nano-crystals.When the CMC concentration was 5.0,2.0,1.4,1.1 and 0.8 g/L,the average diameter of the obtained CaCO₃ particles was 15,20,50,150 and 100 nm,respectively.It could be concluded that the particles became smaller with the increase of the CMC concentration when the CMC concentration varied within the range of 5.0~1.1 g/L.Meanwhile,the CaCO₃nanoparticles were stabilized by the adsorbed CMC molecules.
- biomimetic synthesis,
- N,O-carboxymethylchitosan,
- calcium carbonate,
- nanoparticle,
- biomineralization
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通讯作者: 陈斌, bchen63@163.com

Biomimetic Synthesis of CaCO₃ Nanoparticles in N,O-Carboxymethyl Chitosan Solution