Analysis of Dimensional Stability of Thermally Modified Wood Affected by Wetting-Drying Cycles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F15%3A43907051" target="_blank" >RIV/62156489:43410/15:43907051 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.swst.org/meetings/AM15/pdfs/proceedings_2015.pdf" target="_blank" >http://www.swst.org/meetings/AM15/pdfs/proceedings_2015.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Dimensional Stability of Thermally Modified Wood Affected by Wetting-Drying Cycles

Popis výsledku v původním jazyce

The dimensional stability of thermally modified wood exposed to several wetting-drying cycles was analyzed. Specimens of dimensions 15x15x15 mm3 were thermally modified at 180 and 200 oC. The mass loss and chemical composition of the wood were determinedin order to evaluate the effect and degree of modification. Afterwards, the radial, tangential, and volumetric swelling, anti-swelling efficiency and mass loss due to wetting-drying cycles were determined and compared. The specimen's mass tended to decrease with each additional rewetting cycle. Additional extractives that were formed via thermal decomposition leached out during wetting cycles. Thermal modification positively affected the dimensional stability of all investigated species. The wood's swelling was reduced, a result attributed to hemicellulose degradation. Dimensional stability was improved by 24 to 30% following mild treatment and by 26 to 54% following more severe treatment. When specimens were exposed to six consecutive

Název v anglickém jazyce

Analysis of Dimensional Stability of Thermally Modified Wood Affected by Wetting-Drying Cycles

Popis výsledku anglicky

The dimensional stability of thermally modified wood exposed to several wetting-drying cycles was analyzed. Specimens of dimensions 15x15x15 mm3 were thermally modified at 180 and 200 oC. The mass loss and chemical composition of the wood were determinedin order to evaluate the effect and degree of modification. Afterwards, the radial, tangential, and volumetric swelling, anti-swelling efficiency and mass loss due to wetting-drying cycles were determined and compared. The specimen's mass tended to decrease with each additional rewetting cycle. Additional extractives that were formed via thermal decomposition leached out during wetting cycles. Thermal modification positively affected the dimensional stability of all investigated species. The wood's swelling was reduced, a result attributed to hemicellulose degradation. Dimensional stability was improved by 24 to 30% following mild treatment and by 26 to 54% following more severe treatment. When specimens were exposed to six consecutive

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.30.0031" target="_blank" >EE2.3.30.0031: Postdoktorské pozice v technických a ekonomických oborech na MENDELU</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 58th International Convention of Society of Wood Science and Technology. Renewable Materials and the Bio-Economy

ISBN

978-0-9817876-5-7

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

598-606

Název nakladatele

Society of Wood Science and Technology

Místo vydání

Monona

Místo konání akce

Jackson, Wyoming

Datum konání akce

7. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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