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Optimisation des paramètres durée et température d'un traitement thermique du bois. Modifications des propriétés d'usage du bois en relation avec les modifications physico-chimiques et ultrastructurales occasionnées par le traitement thermique.

Abstract : Heat treatment of retification is aimed to increase wood stability and durability. When the treatment duration is as short as possible, high temperatures are necessary to obtain significant improvement of these two properties. This involves two main drawback : firstly, exothermic reactions may happen and can make the monitoring of the treatment difficult ; secondly, a loss of mechanical strength occurs. By another way, heterogeneity of retified wood is large, since it includes heterogeneity of natural wood and heterogeneity due to the heat treatment process. It is thus necessary to find some tools to check quickly retified wood end-use properties.
The first part of this study deals with the optimisation of parameters of treatment duration and temperature. On the one hand, it is shown that it is possible to improve the heat treatment monitoring by increasing duration and decreasing temperature. On the other hand, the possibility to improve the end-use properties of retified wood is tested and discussed on massive samples.
The second part of this study deals with the means to evaluate quickly the end-use properties of retified wood. This work contributes to find the connection between modifications of physico-chemical and ultrastructural and modifications of wood end-use properties (stability and mechanical resistance).
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https://tel.archives-ouvertes.fr/tel-00012090
Contributor : Andrée-Aimée Toucas <>
Submitted on : Wednesday, April 5, 2006 - 6:31:38 PM
Last modification on : Monday, October 19, 2020 - 10:57:15 AM
Long-term archiving on: : Saturday, April 3, 2010 - 11:07:27 PM

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  • HAL Id : tel-00012090, version 1

Citation

Vincent Repellin. Optimisation des paramètres durée et température d'un traitement thermique du bois. Modifications des propriétés d'usage du bois en relation avec les modifications physico-chimiques et ultrastructurales occasionnées par le traitement thermique.. Génie des procédés. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2006. Français. ⟨tel-00012090⟩

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