Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 110, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmbbm.2020.103942
Keywords
Natural fibre; Composite; Mechanical properties; Toughness; Biomedical applications
Funding
- National Natural Science Foundation of China [51905019]
- China Postdoctoral Science Foundation [2019M650432]
- Fundamental Fund for Central Universities in China
- Royal Society International Exchanges 2017 Cost Share Award [IEC\NSFC\170342]
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There is an emerging interest in natural silkworm silks as alternative reinforcement for engineering composites. Here, we summarize the research on two common silkworm silks and silk fibre reinforced plastics (SFRPs) from the authors over the past few years in the context of related research. Silk fibres from silkworms display good strength and toughness under ambient and cryogenic conditions owing to their elastic-plastic deformation mechanism. In particular, the wild Antheraea pertly((A. pernyi) silk also displays micro- and nano-fibrillation as an important mechanism for toughness and impact resistance. For SFRP composites, we found: (i) it is critical to achieve silk fibre volume fraction to above 50% for an optimal reinforcement and toughening effect; (ii) the tougher A. pernyi silks present a better reinforcement and toughening agent than B. mori silks; (iii) impact and toughness properties are advantageous properties of SFRPs; (iv) hybridization of natural silk with other fibres can further improve the mechanical performance and economics of SFRPs for engineering applications; and (v) the lightweight structure designs can improve the service efficiency of SFRPs for energy absorption. The understanding on the comprehensive mechanical properties and the toughening mechanisms of silks and silk fibre-reinforced polymer composites (SFRPs) could provide key insights into material design and applications.
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