Skip to Main content Skip to Navigation
Theses

Amélioration de la rétention par le bois des sels d'ammonium quaternaire et conséquences sur la résistance à l'attaque des champignons : Etude du comportement, face aux basidiomycètes, du bois greffé par des motifs acyles à longue chaîne carbonée

Abstract : This study involves two distinct parts. In the first part, we have studied the chemical modification of quatemary ammonium salts in wood and the preservation of wood against attack by fungi. The modified and the unmodified quaternary ammonium salts show the same biological activity in an artificial medium. The blocks of wood, impregnated with modified and unmodified salts, show that the modification is very beneficial. We have noted that the retention of modified ammonium in the wood is twice than in wood treated with unmodified ammonium. The results obtained in the impregnation test of wood are confirmed by transmission electron microscopy (TEM) coupled with an Electron Energy Loss Spectrometry (EELS). The modification of the chemical structure of ammonium salts allows an increase of the azote rate in wood (44,4 %).The modified ammonium in the cellular cavity level has been observed by the Scanning Electron Microscopy (SEM). The results we found in the biological wood resistance are very interesting. We have also found, for example, that a 1 % concentration of a quaternary ammonium salts preserves wood from the attack of Coriolus versicolor and Poria placenta. The last part is devoted to the study of the ability of modified sawdusts with fatty acids to protect wood. Interesting results are obtained in this area.
Document type :
Theses
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01748359
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 11:32:42 AM
Last modification on : Thursday, April 12, 2018 - 1:59:59 AM
Long-term archiving on: : Thursday, September 13, 2018 - 8:44:01 PM

File

SCD_T_1998_0235_BOUSTA.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01748359, version 1

Citation

Faisl Bousta. Amélioration de la rétention par le bois des sels d'ammonium quaternaire et conséquences sur la résistance à l'attaque des champignons : Etude du comportement, face aux basidiomycètes, du bois greffé par des motifs acyles à longue chaîne carbonée. Autre. Université Henri Poincaré - Nancy 1, 1998. Français. ⟨NNT : 1998NAN10235⟩. ⟨tel-01748359⟩

Share

Metrics

Record views

73

Files downloads

54