Spectral sensitivity in the photodegradation of fir wood (Abies alba Mill.) surfaces : colour changes in natural weathering
| Autor: | Hrvoje Turkulin, Vjekoslav Živković, Klaus Richter, Kristijan Radmanović, Martin Arnold |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
biology Mineralogy Forestry Weathering Plant Science biology.organism_classification Industrial and Manufacturing Engineering Abies alba Wavelength wood colour photodegradation spectral sensitivity activation spectra discoloration Spectral sensitivity Materials Science(all) General Materials Science Irradiation Surface layer sense organs Composite material Photodegradation skin and connective tissue diseases Visible spectrum |
| DOI: | 10.1007/s00226-013-0601-4 |
| Popis: | Activation spectra of wood under natural irradiation were investigated in detail in this work. The main purpose was to study colour changes on the wood surface over time and into the depth during natural light exposure and thus to further contribute to the optimization of surface-protecting treatments. In a natural weathering test, three 80-μm-thick strips of fir wood forming the surface layer of a wood composite were exposed to light under a series of glass cut-off filters. Samples were withdrawn at intervals and tested for colour changes. Identification of the most detrimental wavebands of light causing photodegradation was performed based on recorded colour changes. With chronological development of exposure, the colour changes shifted ever deeper into the surface and further into the visible region of the spectrum. A relatively narrow waveband from 360 to 435 nm was identified in the activation spectra to be the most active band, causing the greatest proportion of recorded colour changes. However, also visible light of wavelengths up to 515 nm significantly contributed to colour changes of the surface layers. |
| Databáze: | OpenAIRE |
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