Study of chemical modifications and fungi degradation of thermally modified wood using DRIFT spectroscopy
Résumé
A mild thermal treatment of wood leads to improved macroscopic properties (dimensional stabilization and resistance against fungal degradation). The chemical modifications induced by the thermal treatment were investigated by means of DRIFT spectroscopy on wood blocks in order to explain the new macroscopic properties on a molecular level. The formation of new ether linkage was observed in addition to the well-known acidic hydrolysis reactions of wood. Fungal attack was found to take place even after thermal degradation of pentosanes by a standard oxidative way. A competition between depolymerization and condensation reactions was observed.
Mots clés
Angiospermae
Dicotyledones
Fagaceae
Spermatophyta
Gymnospermae
Coniferales
Basidiomycetes
Thallophyta
Condensation
Depolymerization
Infrared spectrum
Hardwood
Fagus sylvatica
Softwood
Pinus pinaster
Wood preservative
Poria
Fungi
Biodegradation
Experimental study
Fourier transform spectroscopy
Rectification
Modified wood