Chemical-mechanical stability of the hierarchical structure of shell nacre
Chemical-mechanical stability of the hierarchical structure of shell nacre
复制标题
贝壳珍珠层分级结构的化学机械稳定性
DOI：
10.1007/s11433-010-0134-x
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发表时间：
2010-02
影响因子：
6.4
通讯作者：
Guo WanLin
中科院分区：
文献类型：
--
作者：
Sun JinMei;Guo WanLin
从化学稳定性和化学-力学耦合的新角度对贝壳珍珠层的分级结构和力学性能进行了实验研究。通过化学脱蛋白或脱矿方法，结合微/纳米尺度表征技术，发现皱纹盘鲍珍珠层中含有由不规则文石片层和片层间有机基质薄层堆叠而成的分级结构。而文石片晶本身是由纳米颗粒和片晶内有机基质骨架组成的纳米复合材料。不同晶型的纳米粒子的平均粒径和骨架分布有很大差异。虽然片晶间和片晶内有机基质都能被氢氧化钠溶液分解，但单个文石片晶的化学稳定性远高于与它们堆叠在一起的微结构的化学稳定性。此外，对氢氧化钠处理后的珍珠层的微/纳米结构进行宏观弯曲测试或纳米压痕实验。结果表明，叠层微结构和纳米复合片晶的杨氏模量均降低。显微组织的减少比片晶的减少更为显著。因此，纳米复合片晶本身的化学机械稳定性远高于珍珠层的堆叠微结构的化学机械稳定性。
The hierarchical structure and mechanical property of shell nacre are experimentally investigated from the new aspects of chemical stability and chemistry-mechanics coupling. Through chemical deproteinization or demineralization methods together with characterization techniques at micro/nano scales, it is found that the nacre of abalone,haliotis discus hannai, contains a hierarchical structure stacked with irregular aragonite platelets and interplatelet organic matrix thin layers. Yet the aragonite platelet itself is a nanocomposite consisting of nanoparticles and intraplatelet organic matrix framework. The mean diameter of the nanoparticles and the distribution of framework are quite different for different platelets. Though the interplatelet and intraplatelet organic matrix can be both decomposed by sodium hydroxide solution, the chemical stability of individual aragonite platelets is much higher than that of the microstructure stacked with them. Further, macroscopic bending test or nanoindentation experiment is performed on the micro/nanostructure of nacre after sodium hydroxide treatment. It is found that the Young’s modulus of both the stacked microstructure and nanocomposite platelet reduced. The reduction of the microstructure is more remark than that of the platelet. Therefore the chemical-mechanical stability of the nanocomposite platelet itself is much higher than that of the stacked microstructure of nacre.
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影响因子：
14
作者：
Song, F;Soh, AK;Bai, YL
通讯作者：
Bai, YL
影响因子：
4.5
作者：
K. Katti;D. Katti;Jing-Ying Tang;S. Pradhan;M. Sarikaya
通讯作者：
K. Katti;D. Katti;Jing-Ying Tang;S. Pradhan;M. Sarikaya
影响因子：
8.6
作者：
F. Song;J. Zhou;Xianghong Xu;Yi Xu;Yi-long Bai
通讯作者：
F. Song;J. Zhou;Xianghong Xu;Yi Xu;Yi-long Bai
DOI：
10.1098/rspa.1999.0423
发表时间：
1999-07
期刊：
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
影响因子：
--
作者：
S. Mesarovic;N. Fleck
通讯作者：
S. Mesarovic;N. Fleck
DOI：
10.1016/j.msea.2004.06.072
发表时间：
2005-01-15
影响因子：
6.4
作者：
Lin, A;Meyers, MA
通讯作者：
Meyers, MA