摘要
采用FTIR实时红外检测方法研究室温～600℃范围内贝壳珍珠层的红外光谱特征,结合热重分析考察淡水养殖珍珠贝壳中的有机和无机组分变化情况。采用扫描电子显微镜观察珍珠层的微结构,并利用X-射线衍射方法测量不同温度下贝壳中无机成分的晶相变化。结果表明,贝壳中氨基酸类有机物热分解后部分以胺的形式挥发,另一部分则转化为不可挥发的硝酸盐;加热至600℃时,贝壳中有机物消失完全;无机成分中碳酸钙的文石晶相随温度变化:在500℃时转变为方解石结构;600℃开始则分解为氧化钙。此研究可为生物矿化机理提供基础数据。
The spectra characteristics and changes of organic and inorganic compositions of nacre of shell cultured in freshwater from room temperature to 600 ℃ were instant studied by Fourier transform infrared spectroscopy （FTIR） and thermal gravimetric analysis （TGA）. The microstructure of nacre was observed by scanning electron microscope （SEM） , the changes of crystalline phase of inorganic compositions at different temperature were surveyed by X-ray diffraction （XRD）. The results showed that amino organic compounds in the shell were changed partially to the volatilizable amine and the others were transformed to the involatile nitrate compounds after thermal decompositon. The organic compounds disappeared completely at 600 ℃. The aragonite phase of calcium carbonate in inorganic composition changed with temperature and transformed from aragonite to calcite at 500 ℃, and calcium carbonate began to be decomposed to calcium oxide at 600℃. All of these can provide basic data for studying the biomineralization process and mechanisms of biological organisms.
出处
《黑龙江大学自然科学学报》
CAS
北大核心
2011年第1期85-89,共5页
Journal of Natural Science of Heilongjiang University
基金
安徽省教育厅高校省级自然科学一般项目(KJ2008B275)
安徽省高校青年教师科研"资助计划"项目(2008jp1038)
