引用本文:
吴刚, 陈龙, 谢安建, 沈玉华, 李士阔, 张庆凤. N,O-羧甲基壳聚糖体系中纳米碳酸钙的仿生合成[J]. 应用化学,
2006, 23(10): 1076-1080.
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.
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.
N,O-羧甲基壳聚糖体系中纳米碳酸钙的仿生合成
摘要:
将壳聚糖改性制得相对分子质量为3.08×105、取代度为1.84%的N,O-羧甲基壳聚糖(CMC),并以之作为模拟生物矿化的有机质诱导和调控碳酸钙晶体的成核与生长,采用红外光谱、紫外光谱、透射电镜及X射线衍射等测试技术对所得产物进行了表征。研究结果表明,CMC通过和钙离子的配位作用,调控生成了以高能量球霰石为主的碳酸钙纳米微晶;当CMC的质量浓度为5.0、2.0、1.4、1.1和0.8 g/L时,所得碳酸钙的粒径分别为15、20、50、150和100 nm。可见在CMC为5.0~1.1 g/L的浓度范围内,体系所生成的碳酸钙粒径随CMC浓度的升高而减小;CMC的表面活性和吸附包裹作用稳定了生成的碳酸钙纳米粒子。
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关键词:
- 仿生合成
- / N,O-羧甲基壳聚糖
- / 碳酸钙
- / 纳米粒子
- / 生物矿化
English
Biomimetic Synthesis of CaCO3 Nanoparticles in N,O-Carboxymethyl Chitosan Solution
Abstract:
N,O-Carboxymethyl chitosan(CMC)(Mw=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.
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Key words:
- biomimetic synthesis
- / N,O-carboxymethylchitosan
- / calcium carbonate
- / nanoparticle
- / biomineralization
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