碳酸钙在水溶性甲壳素溶液中的结晶行为

The Crystal Behavior of Calcium Carbonate in Water-Soluable Chitin

依据生物矿化基本原理,以甲壳素作为有机基质,探讨了在不同浓度甲壳素溶液中CaCO3晶体的生长情况;同时研究了生长体系的pH值和温度对生成CaCO3晶体的影响。通过傅里叶红外光谱、扫描电子显微镜进行表征的结果表明,甲壳素溶液中形成的CaCO3晶体完全不同于纯水中形成的晶体;而且甲壳素溶液的浓度不同,形成的CaCO3晶体的晶型也有较大差别。在CaCO3结晶过程中,CaCO3对甲壳素也有影响,即晶体与甲壳素之间存在相互作用。

Based on the basic principles of biominerlization, the paper analyses calcium carbonate crystallization in waterable chitin solution under the control of chitin, using chitin as the matrix; and analyseses the effect on crystals by varying temperature or pH of the system. The obtained calcium carbonate was characterized by Fourier transform infrared spectroscopy （FTIR）, scanning electronic microscopy（SEM） and X ray powder diffraction（XRD）. As a result, it was found that crystals were different formed in purity water~ and the obtained crystals are different in different concentration chitin solution. Calcium carbonate has effect on chitin during the calcium carbonate formation process, so there is the interaction between chitin and calcium carbonate.