The effect of carboxymethyl chitosan on the precipitation of calcium carbonate
The effect of carboxymethyl chitosan on the precipitation of calcium carbonate
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DOI：
10.1016/j.jcrysgro.2003.03.001
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发表时间：
2004-02-01
影响因子：
1.8
通讯作者：
Xu, DF
中科院分区：
文献类型：
--
作者：
Liang, P;Zhao, Y;Xu, DF
壳聚糖对壳的无机-有机杂化结构的形成具有重要作用。本文将水不溶性壳聚糖改性为水溶性大分子羧甲基壳聚糖（CMCS），并将其作为碳酸钙（CaCO 3）结晶过程的添加剂。XRD、Micro FT-IR和SEM对沉淀晶体的综合研究表明，CMCS的加入明显改变了晶体的形貌，但没有引起晶型的转变，CaCO 3在所有情况下都保持方解石的形态，无论是否存在于沉淀系统中的CMCS。CaCO 3的形态变化强烈依赖于水溶液中的CMCS浓度。(C)2003 Elsevier B. V.保留所有权利。
It is believed that chitosan plays an important role on the formation of specific inorganic-organic hybrid structure of shells. In this paper, insoluble chitoan was modified to a water-soluble macromolecule-carboxymethyl chitosan (CMCS), and further used as an additive in the crystallization process of calcium carbonate (CaCO3). The combination investigation of XRD, Micro FT-IR and SEM on the precipitated crystals shows that the addition of CMCS obviously changed the crystal morphology, but did not induce the transformation of the crystal form, i.e., CaCO3 keeps calcite form in all the cases no matter whether CMCS exists or not in the precipitation systems. The morphological variation of CaCO3 strongly depends on the CMCS concentration in the aqueous solutions. (C) 2003 Elsevier B.V. All rights reserved.