Analysis of the role of the main constitutive polysaccharides in the flax fibre mechanical behaviour

摘要: Abstract The role of the main cell-wall polysaccharide-constituents flax fibres on their mechanical behaviour has been investigated. One sample scutched underwent a successive sequence extractions (boiling water, EDTA, HCl, NaOH), and tensile tests elementary were carried out after each step. Results indicated primary in performance fibres. Indeed, an increase TIII proportion was observed boiling water extraction. Furthermore, EDTA extraction, significant decrease strength at tangent modulus threshold (312–153 MPa) strain rupture (2.3–2.9%), occurred. Additionally, it highlighted that Young’s decreased In secondary cell-wall, deduced matrix polysaccharides involved load transfer whereas structuring enhanced cohesion between cellulose microfibrils. At end extraction sequence, still had performances close to those regenerated ones exhibited typical non-linear behaviour. Thus, hypothesized microfibril reorientation phenomena can occur NaOH when are mostly composed cellulose.