Multiscale analysis of hierarchical flax-epoxy biocomposites with nanostructured interphase by xyloglucan and cellulose nanocrystals - Biopolymères Interactions Assemblages Access content directly
Journal Articles Composites Part A: Applied Science and Manufacturing Year : 2024

Multiscale analysis of hierarchical flax-epoxy biocomposites with nanostructured interphase by xyloglucan and cellulose nanocrystals

Abstract

Natural biological systems feature hierarchical nanostructured architectures achieving high strength and toughness. In this work, the spontaneous adsorption of xyloglucan (XG) and cellulose nanocrystals (CNC) onto flax fabrics is considered to develop hierarchical interphases with improved interfacial adhesion in epoxy-based biocomposites. A multi-scale analysis is carried out, from the nano & micrometric scale with the characterization of fibre surface topography, work of adhesion and interfacial shear strength (IFSS) between flax fibres and epoxy resin, to the macroscopic scale with the transverse mechanical properties of biocomposites. At the fibre scale, XG and CNC increase the surface roughness of flax fibres, as well as their adhesion to epoxy resin with IFSS improved by 60 %, up to 22.3 MPa. At the composite scale, the treatments have a major influence on the cohesion of flax cell walls and microstructure of the biocomposites. Transverse tensile tests reveal both cohesive and adhesive interfacial failure.
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Thursday, November 14, 2024
Embargoed file
Thursday, November 14, 2024
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Dates and versions

hal-04582973 , version 1 (22-05-2024)

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Estelle Doineau, Monica Francesca Pucci, Bernard Cathala, Jean-Charles Bénézet, Julien Bras, et al.. Multiscale analysis of hierarchical flax-epoxy biocomposites with nanostructured interphase by xyloglucan and cellulose nanocrystals. Composites Part A: Applied Science and Manufacturing, 2024, 184, pp.108270. ⟨10.1016/j.compositesa.2024.108270⟩. ⟨hal-04582973⟩
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