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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20502 - Paper and wood

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

10

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

1662

UT code for WoS article

000655146900001

EID of the result in the Scopus database

2-s2.0-85107284204