期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 222, 期 1, 页码 105-110出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2011.05.008
关键词
Beech; Lignin; Cellulose; Hemicelluloses; LASER; Irradiation dose; FTIR spectroscopy; Carbohydrates
The paper deals with color changes and wood component changes caused by laser beam irradiation. A 500 mm x 150 mm x 15 mm beech (Fagus sylvatica, L) board was irradiated by the CO2 laser beam at different exposures (expressed as the irradiation dose). The color changes were measured by the spectrophotometer and described in the CIELAB color system. Changes in the main wood components were observed by the Fourier transform infrared spectroscopy (FTIR) and carbohydrates were analysed by the gas chromatography of their aldonitrilacetates. With increasing the irradiation dose (from 14 to 57J cm(-1)) was observed a continual growth of the total color difference (Delta E*). Predominantly hemi-celluloses degradation was observed, while at a higher energy dosage lignin condensation occurred. (C) 2011 Elsevier B.V. All rights reserved.
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