Department of Wood Science and Technology (FFWT) - list of publications


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ČERMÁK, P. -- DEJMAL, A. -- PASCHOVÁ, Z. -- KYMÄLÄINEN, M. -- DÖMÉNY, J. -- BRABEC, M. -- HESS, D. -- RAUTKARI, L. One-sided surface charring of beech wood. Journal of Materials Science. 2019. v. 54, no. 13, p. 9497--9506. ISSN 0022-2461. URL: https://link.springer.com/article/10.1007%2Fs10853-019-03589-3

Original name: One-sided surface charring of beech wood
Czech name:
Written by (author): Ing. Petr Čermák, Ph.D.
Ing. Aleš Dejmal, Ph.D.
Mgr. Zuzana Paschová, Ph.D.
Maija Kymäläinen
Ing. Jakub Dömény, Ph.D.
Ing. Martin Brabec, Ph.D.
Ing. Dominik Hess
Lauri Rautkari
Department: Department of Wood Science and Technology
Kind of publication: article in a professional periodical
Periodical: Journal of Materials Science
Nature of article: paper
Volume no. (year): 54
Periodical number within the volume: 13
Year of publication: 2019
Starting page: 9497
Up to page: 9506
Number of pages: 10
Sub-specification: článek je obsažen v databázi Web of Science
UT code by Web of Science:
EID code by Scopus:
Form of publication: printed version
Original language: English
Description in original language: One-sided surface charring of beech wood (Fagus sylvatica L.) was analyzed. Specimens were charred on one surface using contact heating system with a hot plate, at a temperature of 220 degrees C and atmospheric pressure for 15 or 40min. Surface charring was applied on the radial or tangential surface. Spectrophotometric chemical analysis was carried out to determine the total amount of soluble carbohydrates and phenolic compounds beneath the surface in order to evaluate the depth (within 1, 2, 3 and 4mm) of the degradation affected by the charring. Specimens of dimensions 14x14x14mm were used to determine the moisture behavior of charred specimens. The equilibrium moisture content (EMC) of specimens was calculated at a temperature of 20 degrees C and 65% relative humidity. Water absorption (WA) was recorded during the water immersion for 240h at various intervals. Finally, the three-point bending tests were undertaken and modulus of rupture (MOR) and modulus of elasticity were calculated. Degradation of the main wood compounds due to chemical changes occurred during the surface charring is closely associated with a mass loss (3.5-5.5%) and further related to the severity of process and orientation of specimens to heat flow. Application of surface charring resulted in the significant reduction in EMC (20%) as a result of a decrease in hydroxyl groups, an increase in cellulose crystallinity as well as further cross-linking of lignin. Furthermore, the WA of one-sided surface-charred wood considerably decreased (15%) when compared to that of the control specimens. A significant increase in soluble carbohydrates as well as phenolic compounds was found, and it can be stated that one-sided charring affected wood properties to depth 2-3mm from the surface. Significant differences (14-24%) of bending strength MOR results are most likely due to improved sorption behavior of wood. The results show that beech wood charring improved moisture-related characteristics and consequently led to better mechanical behavior, but more studies are needed to exploit the potential of surface charring method for future use.
Description in English:
Description in Czech:
Year of submission: 2019
Year of transmission:
RIV identification number:
URL: https://link.springer.com/article/10.1007%2Fs10853-019-03589-3
 
Entry made by: Markéta Hejčová, DiS.
Last change: 05/21/2019 11:06 (Markéta Hejčová, DiS.)

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Source specification:

Journal of Materials Science. New York: ISSN 0022-2461.

Original name: Journal of Materials Science
Czech name:
Written by (author):
Kind of publication: magazine
ISSN: 0022-2461
Country of publisher: United States of America
Place of publishing: New York
Publisher: Springer
URL: http://www.springer.com/materials/journal/10853
Reviewed magazine: no
Original language: English
Description in original language:
Description in English:
Description in Czech:
 
Entry made by: Markéta Hejčová, DiS.
Last change: 12/22/2016 09:11 (Šárka Novotná)

Evaluation of publication:

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interesting
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amateur
 
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practical
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