Journal
BIOINSPIRATION & BIOMIMETICS
Volume 13, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1748-3190/aaa6b7
Keywords
natural fibres; flax stem; composite; microstructure; mechanical properties
Funding
- Fiabilin
- Oseo
- Region Bretagne
- CNRS
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The present paper proposes to carefully study and describe the reinforcement mechanisms within a flax stem, which is an exceptional natural model of composite structure. Thanks to accurate microscopic investigations, with both optical and SEM method, we finely depicted the flax stem architecture, which can be view as a composite structure with an outer protection, a unidirectional ply on the periphery and a porous core; each component has a specific function, such as mechanical reinforcement for the unidirectional ply and the porous core. The significant mechanical role of fibres was underlined, as well as their local organisation in cohesive bundles, obtained because of an intrusive growth and evidenced in this work through nanomechanical AFM measurement and 3D reconstruction. Following a biomimetic approach, these data provide a source of inspiration for the composite materials of tomorrow.
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