甲壳素诱导形成形貌独特的碳酸钙

甲壳素诱导形成形貌独特的碳酸钙 Formation of Several Novel Morphologies of Calcium Carbonate Induced by Chitin 梁慧 LIANG Hui1 1 first-author 彭湘红 PENG Xianghong2 2 李习俊 LI Xijun3 3 王敏娟 WANG Minjuan2 2 武汉大学基础医学院 武汉大学基础医学院 School of Medicine,Wuhan University School of Medicine,Wuhan University 江汉大学化学与环境工程学院 江汉大学化学与环境工程学院 College of Chemistry and Environmental Engineering,Jianghan University College of Chemistry and Environmental Engineering,Jianghan University 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecular Science,Wuhan University College of Chemistry and Molecular Science,Wuhan University 利用甲壳素溶液中的尿素分解所产生的CO2与体系中的Ca2+反应生成碳酸钙,通过控制诱导反应温度、放置时间及体系的pH值,可诱导形成不同形貌的碳酸钙.用X射线衍射仪和扫描电子显微镜对其晶体结构和形貌进行表征,显示该碳酸钙为球霰石、文石和方解石晶体的混合物.结果表明:甲壳素能诱导形成形貌独特的碳酸钙,包括腔体直径为0.6～3.0μm的中空微球、宽约200nm的晶须聚集体、多孔网状结构和直径为1.5～3.0μm的表面光滑的微球. Several novel morphologis of Calcium carbonate （CaCO3） were formed by Ca2+ of the system reacting with CO2 which decomposed by the urea in the chitin solution. Various novel morphologies of calcium carbonate were induced by controlling the reaction time and the temperature,and the pH value of system. The crystallized structure and the morphologies of CaCO3 were characterized by X-ray and the scanning electron micrograph,respectively. The results show that CaCO3 induced by chitin have calcite,aragonite and vaterite crystal structures. There exists various morphologies of CaCO3,including the hollow microspheres with 0.6 3 .0 μm diameter,the aggregate of nanometer whiskers having 200 nm width,the macropore internet,and the smooth surface micropsheres with 1.5 3 .0 μm diameter. 甲壳素 碳酸钙 诱导结晶 纳米晶须 中空微球 尿素 Chitin calcium carbonate induced crystallization nanometer whiskers hollow microspheres urea 10.14188/j.1671-8836.2010.01.006 O611.3 湖北省教育厅科学研究计划项目（B20093404）;武汉市市属高校科研项目（2008K040）;武汉市科技计划项目（0751699478-06） 2010-01-01 2021-04-01 1 56