The Influence of Oil Uptake on Moisture Excluding Efficiency in Thermally Treated Wood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43918138" target="_blank" >RIV/62156489:43410/20:43918138 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.swst.org/wp/wp-content/uploads/2020/07/SWST-2020-Proceedings-Final-final-final.pdf" target="_blank" >http://www.swst.org/wp/wp-content/uploads/2020/07/SWST-2020-Proceedings-Final-final-final.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of Oil Uptake on Moisture Excluding Efficiency in Thermally Treated Wood

Popis výsledku v původním jazyce

Thermal modification of wood is an environmentally friendly method for the improvement of wood water related properties hygroscopicity reduction, dimensional stability and resistance against fungal degradation which uses steam, nitrogen or oil as the heat transfer and oxygen excluding medium. High oil retention was proved during treatment in hot oil, especially when permeable wood species were used or the wood was kept to cool in oil bath. For comparison, hemp oil impregnated, and heat treated (200oC) European beech wood samples were prepared, and the combined treatment was used as well. After the treatment, the samples were held in standard conditions and above the water level. The equilibrium moisture content was lower in all treatments compared to untreated beech and all treatments showed good moisture excluding efficiency, especially in short-term exposure. The combined treatment reduced the wood hygroscopicity the most with moisture excluding efficiency of 27% for saturated air. However, there are two issues which can influence the moisture content measurement in oil treated wood increase in sample density/weight related to oil uptake after treatment and weight change caused by oxygen bonding during spontaneous drying process at the time of sample conditioning.

Název v anglickém jazyce

The Influence of Oil Uptake on Moisture Excluding Efficiency in Thermally Treated Wood

Popis výsledku anglicky

Thermal modification of wood is an environmentally friendly method for the improvement of wood water related properties hygroscopicity reduction, dimensional stability and resistance against fungal degradation which uses steam, nitrogen or oil as the heat transfer and oxygen excluding medium. High oil retention was proved during treatment in hot oil, especially when permeable wood species were used or the wood was kept to cool in oil bath. For comparison, hemp oil impregnated, and heat treated (200oC) European beech wood samples were prepared, and the combined treatment was used as well. After the treatment, the samples were held in standard conditions and above the water level. The equilibrium moisture content was lower in all treatments compared to untreated beech and all treatments showed good moisture excluding efficiency, especially in short-term exposure. The combined treatment reduced the wood hygroscopicity the most with moisture excluding efficiency of 27% for saturated air. However, there are two issues which can influence the moisture content measurement in oil treated wood increase in sample density/weight related to oil uptake after treatment and weight change caused by oxygen bonding during spontaneous drying process at the time of sample conditioning.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20502 - Paper and wood

Projekt

<a href="/cs/project/GJ19-25171Y" target="_blank" >GJ19-25171Y: Hygro-termo-mechanické chování modifikovaných materiálů na bázi dřeva na různých úrovních pozorování</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 2020 Society of Wood Science and Technology International Convention

ISBN

978-1-73404-850-6

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

479-487

Název nakladatele

Society of Wood Science and Technology

Místo vydání

Monona

Místo konání akce

Portorož

Datum konání akce

12. 7. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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