Skip to Main content Skip to Navigation
Theses

Caractérisation HPLC de marqueurs permettant de prévoir l'évolution de certaines propriétés macroscopiques du bois lors de différents processus de dégradation

Abstract : The identification of markers able to highlight and quantify wood deterioration by different degradation agents can be of great interest in the development of material control methods. In the first part of this work, the characterization and the quantification of the two non durable wood species extractives, beech and silky oak, treated or not with propiconazole and exposed to various white rot or brown rot fungi were carried out. The evolution of the quantity and the nature of extractives depend directly on the presence of biocide and allowed to clearly differentiate degraded and non-degraded samples. This is particularly true in the case of catechin identified in the extracts of beech, which is rapidly degraded by rotting fungi constituting therefore a valuable marker of wood degradation. In the second part of this work, the evolution of the chemical composition of wood treated by mild pyrolysis at 240°C under nitrogen was investigated. Although the results mainly confirm those described previously in the literature, isolation of lignin and holocellulose fractions and analysis of monosaccharides constitutive of holocellulose fraction highlighted an important carbonization of wood reported up to now for higher temperatures. This phenomenon is confirmed by 13C NMR and could be at the origin of some of the new properties of the material.
Document type :
Theses
Complete list of metadata

Cited literature [170 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/tel-01748513
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 11:37:01 AM
Last modification on : Thursday, April 12, 2018 - 1:59:58 AM
Long-term archiving on: : Friday, September 14, 2018 - 9:29:36 AM

File

SCD_T_2008_0032_MOUNGUENGUI.pd...
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01748513, version 1

Citation

Wenceslas Steeve Mounguengui. Caractérisation HPLC de marqueurs permettant de prévoir l'évolution de certaines propriétés macroscopiques du bois lors de différents processus de dégradation. Autre. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10032⟩. ⟨tel-01748513⟩

Share

Metrics

Record views

101

Files downloads

2117