Surface Modification of Spruce and Fir Sawn-Timber by Charring in the Traditional Japanese Method-Yakisugi

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F21%3A43919902" target="_blank" >RIV/62156489:43410/21:43919902 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/polym13101662" target="_blank" >https://doi.org/10.3390/polym13101662</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym13101662" target="_blank" >10.3390/polym13101662</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface Modification of Spruce and Fir Sawn-Timber by Charring in the Traditional Japanese Method-Yakisugi

Popis výsledku v původním jazyce

The traditional Japanese method of wood surface charring was studied. To perform the surface charring, three sawn Norway spruce and Silver fir wood boards of dimension 190 x 24 x 4000 mm(3) were tied together to act as a chimney and charred in a short time (3-4 min) with open flame at a temperature above 500 degrees C. Temperature inside the chimney was recorded on the three different positions during the charring process. Surface temperature of spruce increased from 0 degrees C to 500 degrees C in approx. 120-300 s while fir increased in approx. 100-250 s. The thickness of the charred layer and the resulting cupping effect were investigated at the different heights of the chimney to evaluate its variability. Temperature achieved during the charring process was sufficient to get a significant charred layer of 2.5 and 4.5 mm on average for spruce and fir samples, respectively. The analyzed samples showed a significant cupping effect to the charred side with no difference between the annual ring orientation of sawn boards. Spruce exhibit a more significant cupping effect when compared to fir, i.e., 3.2-6 mm and 2.2-4.5 mm, respectively. Furthermore, the pH values of charred samples increased significantly, which could be an indication of improved resistance against wood-decay fungi. For better insight into the traditional charring method, further studies should be carried out to execute the charring process in a consistent quality and therefore fully exploit its potential.

Název v anglickém jazyce

Surface Modification of Spruce and Fir Sawn-Timber by Charring in the Traditional Japanese Method-Yakisugi

Popis výsledku anglicky

The traditional Japanese method of wood surface charring was studied. To perform the surface charring, three sawn Norway spruce and Silver fir wood boards of dimension 190 x 24 x 4000 mm(3) were tied together to act as a chimney and charred in a short time (3-4 min) with open flame at a temperature above 500 degrees C. Temperature inside the chimney was recorded on the three different positions during the charring process. Surface temperature of spruce increased from 0 degrees C to 500 degrees C in approx. 120-300 s while fir increased in approx. 100-250 s. The thickness of the charred layer and the resulting cupping effect were investigated at the different heights of the chimney to evaluate its variability. Temperature achieved during the charring process was sufficient to get a significant charred layer of 2.5 and 4.5 mm on average for spruce and fir samples, respectively. The analyzed samples showed a significant cupping effect to the charred side with no difference between the annual ring orientation of sawn boards. Spruce exhibit a more significant cupping effect when compared to fir, i.e., 3.2-6 mm and 2.2-4.5 mm, respectively. Furthermore, the pH values of charred samples increased significantly, which could be an indication of improved resistance against wood-decay fungi. For better insight into the traditional charring method, further studies should be carried out to execute the charring process in a consistent quality and therefore fully exploit its potential.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Polymers

ISSN

2073-4360

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

1662

Kód UT WoS článku

000655146900001

EID výsledku v databázi Scopus

2-s2.0-85107284204