贝壳中交错纹状的结构对力学性能的影响

The effect of crossed-laminar structure on mechanical properties in mollusk shell

软体动物贝壳作为最简单的生物矿化材料利用坚硬的外壳保护了柔弱的软体组织。以腹足纲香螺为对象,研究其内层交错纹状的结构及有机蛋白质对纳米压痕等力学性能的影响。实验结果表明,加热前后贝壳的力学性能发生改变,加热后各项力学性能随之降低。加热前后贝壳交错纹状结构中有机蛋白质分子和文石晶体界面处模型的变化,表明力学性能不仅仅与贝壳独特的微观结构相关,同时也与其中的有机质以及有机质和无机相之间的健合等因素有关。

The mollusk shells, as a simple biominerals, have developed a rigid calcified shell to protect the soft body against environmental pressures and predators. The paper has studied the effect of the crossed-laminar structure and organic matrix protein on mechanical properties of nanoindentation of the hemifusus tuba conch shell. The results showed that the states of the organic matrix protein were different before heated and after heated, and which changed the mechanical properties of mollusk shells. After heated the mechanical properties decreased seriously. Thus applying the interface models of organic protein and inorganic crystal in the crossed-laminar structure between former and after heating states preferably explain that the mechanical properties are not only correlative to unique microstructure, but also relate with the organic matrix and the bond between the organic matrix and inorganic mineral.