Surface Changes of Selected Hardwoods Due to Weather Conditions

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface Changes of Selected Hardwoods Due to Weather Conditions

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Surface Changes of Selected Hardwoods Due to Weather Conditions

Popis výsledku anglicky

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

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

FORESTS

ISSN

1999-4907

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

15

Strana od-do

1-15

Kód UT WoS článku

000448398100053

EID výsledku v databázi Scopus

2-s2.0-85053618916