Tubular structure agglomerates of calcium carbonate crystals formed on a cation-exchange membrane
Tubular structure agglomerates of calcium carbonate crystals formed on a cation-exchange membrane
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DOI：
10.1021/cg060045x
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发表时间：
2006-07-05
影响因子：
3.8
通讯作者：
Ooshima, Hiroshi
中科院分区：
文献类型：
--
作者：
Takiguchi, Masakazu;Igarashi, Koichi;Ooshima, Hiroshi
通过使用1 M氯化钙和1 M碳酸钠以及特别设计的配备有阳离子交换膜的结晶器来进行碳酸钙的结晶。结晶器为夹套圆柱形玻璃管，其通过阳离子交换膜分成两个隔室并水平放置。碳酸钙晶体在碳酸钠溶液侧的阳离子交换膜表面上生长，并垂直于膜表面形成自组装管状团聚体。该管被命名为CC管。在50 ℃下结晶9天后获得的CC管的内径和外径分别为约15 μ m和30 μ m。长度约200-400 μ m。大多数CC管由小方解石晶体组成。管的生长部位是膜与管的界面而不是管的顶部。
Crystallization of calcium carbonate was carried out by using 1 M calcium chloride and 1 M sodium carbonate and a specially designed crystallizer equipped with a cation-exchange membrane. The crystallizer is a jacketed cylindrical glass tube that was divided into two compartments by a cation-exchange membrane and placed horizontally. Calcium carbonate crystals grew on the surface of the cation-exchange membrane in the sodium carbonate solution side and formed self-assembled tubular agglomerates vertically against the membrane surface. The tube was named the CC-tube. The inner and outer diameters of the CC-tube obtained after 9 days of crystallization at 50 degrees C was about 15 and 30 mu m, respectively. The length was about 200-400 mu m. Most of the CC-tubes were composed of small calcite crystals. The growing site of the tube was concluded to be the interface between the membrane and the tube rather than the top of tube.