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Theses

Durabilité de l'aspect naturel et conféré du bois : Amélioration par des traitements chimique et thermique

Abstract : The improvement of the durability of the surface aspect of a wood covered with a clearcoating is a veritable economic issue as far as outdoors use of timber is concerned. The variability of the photochemical behaviour of the various wood objects is assigned to the nature and the content of the extracts. First, we analyzed the natural color of a broad range of wood species of varied origins and its durability during a photochemical ageing. Correlations between the variations of the chromatic coordinates and the origin, the content and the antioxidant properties of the extracts were investigated. Second, we have attempted to improve the stability of a conferred wood color by environmentaly friendly treatments: impregnation by durable wood extracts and heat treatment. EPR was used to follow the kinetics of the radical species formations involved in the wood photodegradation. The last part was devoted to the study of the stabilization of the wood aspect by chemical modification of the phenolic chromophores of the wood components.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2006_0066_AHAJJI.pdf
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https://hal.univ-lorraine.fr/tel-01746614
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Submitted on : Thursday, March 29, 2018 - 10:41:18 AM
Last modification on : Wednesday, March 11, 2020 - 10:09:35 AM

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  • HAL Id : tel-01746614, version 1

Citation

Abdelaziz Ahajji. Durabilité de l'aspect naturel et conféré du bois : Amélioration par des traitements chimique et thermique. Autre. Université Henri Poincaré - Nancy 1, 2006. Français. ⟨NNT : 2006NAN10066⟩. ⟨tel-01746614⟩

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