期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 49, 期 -, 页码 243-250出版社
ELSEVIER
DOI: 10.1016/j.msec.2015.01.003
关键词
Shrimp exoskeleton; Nanomechanics; Temperature dependence; Biomimetic; Rimicaris exoculata; Hydrothermal vents
资金
- NSF CMMI Biomechanics and Mechanobiology Program [CMMI 1131112]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1131112] Funding Source: National Science Foundation
This investigation reports a comparison of the exoskeleton mechanical strength of deep sea shrimp species Rimicaris exoculata and shallow water shrimp species Pandalus platyceros at temperatures ranging from 25 degrees C to 80 degrees C using nanoindentation experiments. Scanning Electron Microscopy (SEM) observations suggest that both shrimp exoskeletons have the Bouligand structure. Differences in the structural arrangement and chemical composition of both shrimps are highlighted by SEM and EDX (Energy Dispersive X-ray) analyses. The variation in the elastic moduli with temperature is found to be correlated with the measured compositional differences. The reduced modulus of R. exoculata is 8.26 +/- 0.89 GPa at 25 degrees C that reduces to 7.61 +/- 0.65 GPa at 80 degrees C. The corresponding decrease in the reduced modulus of P. platyceros is from 27.38 +/- 2.3 GPa at 25 degrees C to 24.58 +/- 1.71 GPa at 80 degrees C. The decrease in reduced moduli as a function of temperature is found to be dependent on the extent of calcium based minerals in exoskeleton of both types of shrimp exoskeletons. (C) 2015 Elsevier B.V. All rights reserved.
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