Effect of larch wood extractive leaching on accelerated weathering aging durability of oil-based coatings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F23%3A97097" target="_blank" >RIV/60460709:41320/23:97097 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.2478/forj-2022-0018" target="_blank" >http://dx.doi.org/10.2478/forj-2022-0018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/forj-2022-0018" target="_blank" >10.2478/forj-2022-0018</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of larch wood extractive leaching on accelerated weathering aging durability of oil-based coatings

Popis výsledku v původním jazyce

Wood is a natural material and is subject to degradation due to weather, UV radiation, and humidity. Wood is composed of many components. The basic structural elements of wood include cellulose, hemicellulose, and lignin. Furthermore, these are accompanying substances, which also include extractive substances. Specifically, these substances, together with lignin, have a negative effect on its life thanks to their chemical reactions, which are initiated mainly by UV radiation (so-called photodegradation). This study evaluates the effect of controlled degradation of extractives and lignin on the surface of the wood before the application of the coating system and also on its overall service life. Samples of larch wood (Larix decidua Mill.) were exposed to exterior natural influences in Prague (Czech Republic) according to EN 927-3 (2020) for 10 and 20 weeks. Subsequently, the samples were sterilized in an autoclave, due to possible contamination of the surface with fungi. The specimens were then treated with two oil-coating systems (V-420 and V-429). Subsequently, they were exposed to artificial aging in a UV chamber according to EN 927-6 (2019). Testing occurred at predetermined time intervals of 0, 1, 3, and 6 weeks, roughly corresponding to 0, 2, 6, and 12 months outdoors. The evaluated factors were the change in color, gloss, and surface wettability. The results showed a slightly positive effect of surface washout lasting ten weeks before applying the coating system.

Název v anglickém jazyce

Effect of larch wood extractive leaching on accelerated weathering aging durability of oil-based coatings

Popis výsledku anglicky

Wood is a natural material and is subject to degradation due to weather, UV radiation, and humidity. Wood is composed of many components. The basic structural elements of wood include cellulose, hemicellulose, and lignin. Furthermore, these are accompanying substances, which also include extractive substances. Specifically, these substances, together with lignin, have a negative effect on its life thanks to their chemical reactions, which are initiated mainly by UV radiation (so-called photodegradation). This study evaluates the effect of controlled degradation of extractives and lignin on the surface of the wood before the application of the coating system and also on its overall service life. Samples of larch wood (Larix decidua Mill.) were exposed to exterior natural influences in Prague (Czech Republic) according to EN 927-3 (2020) for 10 and 20 weeks. Subsequently, the samples were sterilized in an autoclave, due to possible contamination of the surface with fungi. The specimens were then treated with two oil-coating systems (V-420 and V-429). Subsequently, they were exposed to artificial aging in a UV chamber according to EN 927-6 (2019). Testing occurred at predetermined time intervals of 0, 1, 3, and 6 weeks, roughly corresponding to 0, 2, 6, and 12 months outdoors. The evaluated factors were the change in color, gloss, and surface wettability. The results showed a slightly positive effect of surface washout lasting ten weeks before applying the coating system.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/TH02020873" target="_blank" >TH02020873: Zvýšení odolnosti nátěrových systémů na vybraných druzích dřeva v exteriérových aplikacích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Central European Forestry Journal

ISSN

2454-034X

e-ISSN

2454-034X

Svazek periodika

69

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

6

Strana od-do

126-131

Kód UT WoS článku

000991889800007

EID výsledku v databázi Scopus

2-s2.0-85160680291