Since phenolic hydroxyl groups represent the principal chromophoric groups in wood, the effect of acetylation treatment of spruce- and beechwood samples on their photodegradation was examined It was revealed that used modification method increased significantly brightness of both wood species. Moreover, the blocking of phenolic hydroxyl groups by acetylation has positive effect on the stabilization of brightness upon photodegradation cased by UV-laser irradiation. Although, acetoxy groups linked to lignin macromolecule are removed partly by UV energy, FTIR analysis of modified wood samples as well as of the isolated lignins shows that the oxidation, ring degradation and demethoxylation reactions proceed in less extent in comparison with that of unmodified wood.
|Number of pages||8|
|Journal||Drevarsky Vyskum/Wood Research|
|Publication status||Published - dec. 1 2002|
ASJC Scopus subject areas
- Materials Science (miscellaneous)