Publication detail

Surface Characteristics of One-Sided Charred Beech Wood

MACHOVÁ, D. OBERLE, A. ZÁRYBNICKÁ, L. DOHNAL, J. ŠEDA, V. DÖMENY, J. VACENOVSKÁ, V. KLOIBER, M. PĚNČÍK, J. TIPPNER, J. ČERMÁK, P.

Original Title

Surface Characteristics of One-Sided Charred Beech Wood

Type

journal article in Web of Science

Language

English

Original Abstract

The aim of this paper was to analyze selected properties of beech wood (Fagus sylvatica L.) treated by one-sided surface charring. Specimens were one-side charred with a hot plate using several time-temperature combinations (from 200 to 400 degrees C). Characteristics such as colour, discoloration, surface roughness, fire resistance, total carbohydrate content at several wood layers and decay resistance were evaluated. Surface charring was applied to the radial and tangential surfaces. Colour measurements showed that the surface of the wood turned grey due to charring. In addition to colour measurements, other experiments showed significant differences between radial and tangential specimens due to their different structures. The higher the temperature used in treating them, the lower the roughness values for radial specimens, while the trend for tangential specimens was the opposite. A smoother surface is more fire resistant, so radial specimens are generally better in this regard. Tangential specimens are more susceptible during preparation to forming cracks that impair flame resistance because a continuous protective densified layer is not formed. The determination of total carbohydrates revealed significant changes at various wood depths after surface charring. These changes were more predictable in radial specimens due to the annual ring orientation, because each layer consisted of a similar earlywood/latewood ratio. Finally, when decay resistance was assessed, weight loss was found to be lower in all specimens than in the references. The results suggest that charring at a particular combination of temperature and time improved the investigated properties of the surface-modified beech.

Keywords

surface charring; wood modification; colour changes; surface roughness; fire resistance; phenol sulphuric acid assay; decay resistance; beech

Authors

MACHOVÁ, D.; OBERLE, A.; ZÁRYBNICKÁ, L.; DOHNAL, J.; ŠEDA, V.; DÖMENY, J.; VACENOVSKÁ, V.; KLOIBER, M.; PĚNČÍK, J.; TIPPNER, J.; ČERMÁK, P.

Released

12. 5. 2021

Publisher

MDPI

Location

BASEL

ISBN

2073-4360

Periodical

Polymers

Year of study

13

Number

10

State

Swiss Confederation

Pages from

1

Pages to

15

Pages count

15

URL

https://www.mdpi.com/2073-4360/13/10/1551

Full text in the Digital Library

http://hdl.handle.net/11012/200981

BibTex

@article{BUT171502,
  author="Dita {Machová} and Anna {Oberle} and Lucie {Zárybnická} and Jakub {Dohnal} and Vít {Šeda} and Jakub {Dömeny} and Veronika {Vacenovská} and Michal {Kloiber} and Jan {Pěnčík} and Jan {Tippner} and Petr {Čermák}",
  title="Surface Characteristics of One-Sided Charred Beech Wood",
  journal="Polymers",
  year="2021",
  volume="13",
  number="10",
  pages="1--15",
  doi="10.3390/polym13101551",
  issn="2073-4360",
  url="https://www.mdpi.com/2073-4360/13/10/1551"
}