Better insight into the nano-mechanical properties of flax fibre cell walls

Olivier Arnould (1, 2, 3) , David Siniscalco (3) , Alain Bourmaud (3) , Antoine Le Duigou (3) , Christophe Baley (3)

1 LMGC - Laboratoire de Mécanique et Génie Civil
2 BOIS - Bois
3 IRDL - Institut de Recherche Dupuy de Lôme

Peak-Force Quantitative Nano-Mechanical property mapping (PF-QNM) was applied to explore the nano-mechanical properties of flax fibre cell walls in cross-section. After validation of the ability of PF-QNM to determine stiffness gradients in aramid fibres, measurements were performed on developing flax bast fibres. The presence of two layers with different indentation moduli implies their progressive development during thickening of the secondary cell wall. Finally, measurements were carried out on technical flax fibre cell wall; but, in this case, no significant stiffness gradient could be identified in the secondary S 2 layer.

Mots clés: AFM (Atomic Force Microscopy); PF-QNM (Peak-Force Quantitative Nano-Mechanical property mapping); Nanoindentation; Flax fibre; Aramid fibre

Domaines: Mécanique des matériaux [physics.class-ph]

Olivier Arnould, David Siniscalco, Alain Bourmaud, Antoine Le Duigou, Christophe Baley. Better insight into the nano-mechanical properties of flax fibre cell walls. Industrial Crops and Products, 2017, 97, pp.224 - 228. ⟨10.1016/j.indcrop.2016.12.020⟩. ⟨hal-01436083⟩