Impact of Thermal Treatment and Accelerated Aging on the Chemical Composition, Morphology, and Properties of Spruce Wood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F25%3A103536" target="_blank" >RIV/60460709:41320/25:103536 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/1999-4907/16/1/180" target="_blank" >https://www.mdpi.com/1999-4907/16/1/180</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/f16010180" target="_blank" >10.3390/f16010180</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of Thermal Treatment and Accelerated Aging on the Chemical Composition, Morphology, and Properties of Spruce Wood

Popis výsledku v původním jazyce

Thermal modification improves the properties of wood, especially its stability and durability. We thermally treated spruce wood with the Thermowood process at three temperatures (160 degrees C, 180 degrees C, and 210 degrees C) and subjected it to accelerated aging in wet mode. We evaluated the chemical composition (wet chemistry, infrared spectroscopy), color, surface morphology, and wetting of the wood surface with water. Thermal treatment caused a significant decrease in hemicelluloses (up to 72.39% at a temperature of 210 degrees C), which initiated an increase in the content of more resistant wood components-cellulose and lignin. With accelerated aging, the hemicellulose content decreased by another 5%. The most significant differences between the infrared spectra of thermally modified wood before and after exposure to accelerated aging were in the absorption bands of lignin (1509 and 1596 cm-1) and in the region of carbonyl groups between 1800 and 1630 cm-1. Thermal treatment also caused a change in the color of the wood to dark brown; the overall color difference Delta E increased several times. The thermal-induced shortening of polysaccharide fibers and reduction in their width were even more manifested during accelerated aging. This work contains new knowledge about the properties critical for the reuse of thermally modified wood after accelerated aging, simulating the end of its life cycle.

Název v anglickém jazyce

Impact of Thermal Treatment and Accelerated Aging on the Chemical Composition, Morphology, and Properties of Spruce Wood

Popis výsledku anglicky

Thermal modification improves the properties of wood, especially its stability and durability. We thermally treated spruce wood with the Thermowood process at three temperatures (160 degrees C, 180 degrees C, and 210 degrees C) and subjected it to accelerated aging in wet mode. We evaluated the chemical composition (wet chemistry, infrared spectroscopy), color, surface morphology, and wetting of the wood surface with water. Thermal treatment caused a significant decrease in hemicelluloses (up to 72.39% at a temperature of 210 degrees C), which initiated an increase in the content of more resistant wood components-cellulose and lignin. With accelerated aging, the hemicellulose content decreased by another 5%. The most significant differences between the infrared spectra of thermally modified wood before and after exposure to accelerated aging were in the absorption bands of lignin (1509 and 1596 cm-1) and in the region of carbonyl groups between 1800 and 1630 cm-1. Thermal treatment also caused a change in the color of the wood to dark brown; the overall color difference Delta E increased several times. The thermal-induced shortening of polysaccharide fibers and reduction in their width were even more manifested during accelerated aging. This work contains new knowledge about the properties critical for the reuse of thermally modified wood after accelerated aging, simulating the end of its life cycle.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

FORESTS

ISSN

1999-4907

e-ISSN

1999-4907

Svazek periodika

16

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

21

Strana od-do

1-21

Kód UT WoS článku

001404118000001

EID výsledku v databázi Scopus

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