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Communication Dans Un Congrès Année : 2012

High resolution scanning diffractometry for wood microstructure observations

Résumé

The hierarchical architecture of biopolymers induces remarkable behaviour. Wood mechanical properties mainly originate from the organization of wood tissue and interactions of cellwall components. The respective contribution on components inside those networks occurs at nanometric scale and still challenging to investigate in-situ. X-ray scattering techniques are now used as a routine technique to investigate internal organization of material components. For that purpose large-scale synchrotron facilities like ESRF offer leading X-ray sources capabilities (large energy range, high brilliance, high intensity, dedicated setups). ESRF's ID13 beamline serves high spacial resolution scanning setups to expertise in elastic scattering of monochromatic X-rays. Since analytical description of the scattering signal of cellulose have been well describe wood material benefit wide range of exposure conditions and sample environment. During this conference, we will present our achievements based on transverse sections of poplar specimens exposed to micrometric beam (1.2 μm side, 12.6 keV energy) to reveal crystalline cellulose distribution within wood tissue and to nanometric beam (100 nm side, 12 6 keV energy) to map the evolution of cellulose orientation within double cell wall over combined Wide-Angle (WAXS) and Small-Angle (SAXS) X-ray Scattering configuration. Within those setups hygrometric sample environment and stretching solicitations will be approached based on-going developments.

Domaines

Matériaux
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Dates et versions

hal-01113298 , version 1 (04-02-2015)

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  • HAL Id : hal-01113298 , version 1

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Cédric Montero, Bruno Clair, Manfred Burghammer. High resolution scanning diffractometry for wood microstructure observations. COST FP0802 Workshop 'Micro Characterisation of Wood Material', Oct 2012, Edimbourg, United Kingdom. ⟨hal-01113298⟩
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