Abstract
Wood extractives have an influence on different material properties. This study deals with the changes in wood extractives of larch sapwood due to two different low doses of energy irradiations. Electron beam irradiation (EBI) and γ-ray irradiation treatments were done by using two industrial processes. After the different modifications the extractions were performed with an accelerated solvent extractor (ASE) using hexane and acetone/water. The qualitative and quantitative chemical differences of irradiated larch sapwood samples were analysed using gas chromatography–mass spectrometry (GC-MS) and Fourier-transform infrared spectroscopy (FT-IR) vibrational spectroscopy methods. The yields of the quantitative extractions decreased due to the two different irradiation processes. While the compounds extracted with nonpolar solvent from wood were reduced, the number of compounds with polar functionalities increased based on the oxidation process. Quantitatively, resin acids and polyphenols were highly affected when exposed to the two irradiation sources, leading to significant changes (up, down) in their relative amount. Furthermore, two new substances were found in the extracts of larch sapwood samples after EBI or γ-ray treatments. New insight into the different effects of larch sapwood and wood extractives by EBI and γ-ray was gained in this study.
Funder
Federal State of Salzburg, EFRE, AWS;
Subject
General Materials Science
Reference25 articles.
1. Effect of High-Energy Cathode Rays on Cellulose
2. Changes in lignin and cellulose by irradiation
3. The improvement of wood by radiation-initiated polymerisation of monomer plastic;Buremester;Holz Roh Werkst.,1967
4. Zur Chemie gammabestrahlten Holzes
5. On the hydrogenolysis of lignin. 10. Comparative hydrogenolyses of lignins, lignosulfonic acid, and lignosulfonate model compounds under irradiation with γ-rays;Hoffmann;Paperi Ja Puu.,1976
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