Exploring the mechanical performance and in-planta architecture of secondary hemp fibres

Alain Bourmaud (1) , Jérome Malvestio (2) , Nicolas Lenoir (3) , David Siniscalco (1) , Anouck Habrant (4) , Andrew King (5) , David Legland (4) , Christophe Baley (1) , Johnny Beaugrand (4, 6)

1 IRDL - Institut de Recherche Dupuy de Lôme
2 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux
3 PLACAMAT - Plateforme Aquitaine de Caractérisation des Matériaux
4 INRA - Institut National de la Recherche Agronomique
5 SSOLEIL - Synchrotron SOLEIL
6 URCA - Université de Reims Champagne-Ardenne

Peak-Force Quantitative Nano-Mechanical property mapping (PF-QNM) and Micro Tomography were applied to explore the architecture and nano-mechanical properties of hemp secondary fibres cell walls. After a comparative morphological analysis of both primary and secondary fibres, secondary bundles structure and mechanical properties were investigated. As a first, it was showed that, in spite of important morphological differences, secondary fibres stiffness was the same that primary fibres one; moreover, innovative tomographic images gave an inedited representation of secondary bundles confirming the intrusive development of secondary hemp fibres.

Mots clés: Hemp; Secondary fibres; Morphology; Nanoindentation; AFM; mu-CT tomography

Domaines: Sciences de l'ingénieur [physics]

Alain Bourmaud, Jérome Malvestio, Nicolas Lenoir, David Siniscalco, Anouck Habrant, et al.. Exploring the mechanical performance and in-planta architecture of secondary hemp fibres. Industrial Crops and Products, 2017, 108, pp.1-5. ⟨10.1016/j.indcrop.2017.06.010⟩. ⟨hal-01697271⟩