|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Biological Materials Science Symposium
||Functional Design of Keratinous Materials: Pangolin Scales and the Feather Shaft
||Bin Wang, Marc A. Meyers
|On-Site Speaker (Planned)
Nature presents a plenty of efficient biological materials which are a continuing source of inspiration to develop new synthetic materials. Keratins are among the toughest biological materials, and the pangolins scales and the feather shaft stand out with interesting functions: the scales are strong and resilient to resist sudden and repeated loads from predators, and the feather shaft is light-weight, strong and stiff, yet reasonably flexible. The structure and mechanical properties of scales from Chinese and African pangolins were correlated for the first time. They consist of flattened keratinocytes and show crossed lamellar structure (2~8 Ám). Tensile and compressive behaviors under different strain rates, and along different orientations were studied. The feather shaft shows a morphological gradient of cortex and a layered structure with differentially oriented fibers varying along the shaft length which work in synergy to provide adjusted bending stiffness, torsional rigidity and reasonable flexibility optimized for flight.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)