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Characterization and photodegradation mechanism of three Algerian wood species

Ouadou Yasmina, Aliouche Djamel, Thévenon Marie-France, Djillali Mohammed. 2017. Characterization and photodegradation mechanism of three Algerian wood species. Journal of Wood Science, 63 (3) : pp. 288-294.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : MATERIALS SCIENCE, PAPER & WOOD / Quartile : Q2, Sujet : FORESTRY

Abstract : Aging is the irreversible change of mechanical, physical, and chemical properties of materials; the main objective of this work was to study the photochemical degradation and structural changes of three major Algerian wood species. For this, we evaluated the photodegradation mechanism for Maritime Pine (Pinus pinaster), zeen oak (Quercus canariensis), and afares oak (Quercus afares) by accelerated aging in a Xenon test chamber. Degradation of the samples was established by an initial color change (after 30 h exposure), followed by roughening and cracking (120 h exposure) as translated by scanning electron microscopy and Fourier transform infrared spectroscopy. The discoloration of irradiated wood samples was primarily related to the decomposition of lignin which is the key structure in wood photodegradation. As expected, a decrease in mechanical properties was observed; for all samples, the modulus of elasticity decreased after aging, indicating that the wood specimens loss some of their stiffness. (Résumé d'auteur)

Mots-clés Agrovoc : Pinus pinaster, Quercus, Bois, Propriété technologique, Propriété physicochimique, Propriété mécanique, Photolyse, Décoloration, Élasticité, Spectroscopie infrarouge

Mots-clés géographiques Agrovoc : Algérie

Mots-clés complémentaires : quercus canariensis, quercus afares, Module d'élasticité

Classification Agris : K50 - Processing of forest products
U30 - Research methods

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

  • Ouadou Yasmina, Université M'Hamed Bougara (DZA)
  • Aliouche Djamel, Université M'Hamed Bougara (DZA)
  • Thévenon Marie-France, CIRAD-PERSYST-UPR BioWooEB (FRA)
  • Djillali Mohammed, National Center for Textile and Leather (DZA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/584171/)

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