Surface Changes of Selected Hardwoods Due to Weather Conditions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F18%3A77869" target="_blank" >RIV/60460709:41320/18:77869 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3390/f9090557" target="_blank" >http://dx.doi.org/10.3390/f9090557</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/f9090557" target="_blank" >10.3390/f9090557</a>

Result language
angličtina
Original language name
Surface Changes of Selected Hardwoods Due to Weather Conditions
Original language description
The study is focused on the surface changes of five hardwoods (oak, black locust, poplar, alder and maple) that were exposed to natural weathering for 24 months in the climatic conditions of Central Europe. Colour, roughness, visual and chemical changes of exposed surface structures were examined. The lowest total colour changes (Delta E) were found for oak (23,77), the highest being recorded for maple (34,19). Roughness differences after 24-month exposure (Delta R-a) showed minimal changes in poplar wood (9,41), the highest changes in roughness were found on the surface of alder (22,18). The presence of mould and blue stains was found on the surface of maple, alder and poplar. Chemical changes were characterized by lignin and hemicelluloses degradation. Decreases of both methoxy and carbonyl groups, cleavage of bonds in lignin and hemicelluloses, oxidation reaction and formation of new chromophores were observed. In the initial phases of the degradation process, the discoloration was related to chem
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20502 - Paper and wood

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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