Integrating tough Antheraea pernyi silk and strong carbon fibres for impact-critical structural composites

Yang, Kang; Guan, Juan; Numata, Keiji; Wu, Change; Wu, Sujun; Shao, Zhengzhong; Ritchie, Robert O.

doi:10.1038/s41467-019-11520-2

Title: Integrating tough Antheraea pernyi silk and strong carbon fibres for impact-critical structural composites

Journal Article · 22 August 2019 · Nature Communications

DOI: https://doi.org/10.1038/s41467-019-11520-2 · OSTI ID:1619652

Yang, Kang ^[1]; Guan, Juan ^[2];

^[3]; Wu, Change ^[1]; Wu, Sujun ^[1]; Shao, Zhengzhong ^[4];

^[5]

Beihang Univ. (China)
Beihang Univ. (China); Beijing Advanced Innovation Center for Biomedical Engineering (China)
RIKEN, Saitama (Japan)
Fudan Univ., Shanghai (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

High stiffness and strength carbon fibres are commonly used to reinforce epoxy-resin composites. While wild Antheraea pernyi silk fibres exhibit high toughness originating from their α-helix/random coil conformation structures and their micro-fibre morphology, their insufficient strength and stiffness hinders them from being used in similar structural composites. In this work, we use interply hybridization of silk and carbon fibres to reinforce epoxy-matrix composites. With increased carbon fibre content, the quasi-static tensile/flexural stiffness and strength increases following the rule of mixtures while more silk fibre acts to increase ductility and impact strength. This results in a composite comprising equal volumes of carbon and silk fibres achieving an impact strength of 98 kJ m^-2, which is twice that of purely carbon-fibre reinforced composites (44 kJ m^-2). This work shows tough natural silk fibres and strong synthetic fibres can be successfully integrated into epoxy-resin composites for tailored mechanical properties.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC); USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1619652

Alternate ID(s):: OSTI ID: 1572046

Journal Information:: Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 53 works

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Enhancing the Mechanical Toughness of Epoxy-Resin Composites Using Natural Silk Reinforcements Yang, Kang; Wu, Sujun; Guan, Juan Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-11919-1	journal	September 2017
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The hybrid effect — does it exist? Phillips, L. N. Composites, Vol. 7, Issue 1 https://doi.org/10.1016/0010-4361(76)90273-1	journal	January 1976
A new approach to assessing carbon fiber/epoxy interfacial shear strength by tensile test of 45° fiber bundle composites: Experiment, modeling and applicability Qi, Guocheng; Du, Shanyi; Zhang, Boming Composites Science and Technology, Vol. 129 https://doi.org/10.1016/j.compscitech.2016.04.032	journal	June 2016
The mechanical design of spider silks: from fibroin sequence to mechanical function Gosline, J. M.; Guerette, P. A.; Ortlepp, C. S. Journal of Experimental Biology, Vol. 202, Issue 23 https://doi.org/10.1242/jeb.202.23.3295	journal	December 1999

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