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dc.contributor.authorKymäläinen, Maija
dc.contributor.authorDömény, Jakub
dc.contributor.authorSchwarzkopf, Matthew
dc.contributor.authorŠeda, Vít
dc.contributor.authorRautkari, Lauri
dc.date.accessioned2023-12-14T01:03:21Z
dc.date.available2023-12-14T01:03:21Z
dc.date.issued2023
dc.identifier.issn0043-7719 Sherpa/RoMEO, JCR
dc.identifier.urihttps://repozitar.mendelu.cz/xmlui/handle/20.500.12698/1817
dc.description.abstractSurface carbonization, or charring, of wooden exterior cladding boards is a modification method that creates a fully organic barrier layer in resemblance to a coating. The process effectively degrades the wood and transforms it into a carbonaceous residue that protects the underlying unmodified wood from environmental stresses. The surface quality of wood modified in this manner is a combination of several factors and depends on the manufacturing method and wood species. To assess the quality of spruce and birch modified with contact and flame charring techniques, several experiments were set up from the nanoscale to macroscopic evaluation of surface resistance to different stresses. The changes in elemental composition are scaled with the modification severity with little differences between wood species. The carbon structures analyzed by high-resolution transmission electron microscopy (HR-TEM) were found to be amorphous, but the electron energy-loss spectroscopy (EELS) revealed higher ordering with what is assumed to be random graphitic stacking of carbon sheets. These carbon-carbon bonds are stable, so a higher ordering is hypothesized to induce improved resistance to exterior stresses. The scanning electron microscopy (SEM) revealed a clear difference between contact-charred and flame-charred woods. The selected contact charring temperature was not high enough to induce the transformation of cell walls from anisotropic into an isotropic material but provided other benefits such as a relatively crack-free, smooth and scratch resistant surface. Surface roughness was able to adequately predict the surface quality of the contact-charred samples, and scratch tests were found to be suitable for evaluating the mechanical stress resistance of the surface instead of abrasion. In terms of overall quality, birch instead of spruce was concluded to better respond to both charring methods, although contact charring eliminates some species-specific characteristics, resulting in more homogeneous surfaces.en
dc.format1299-1317
dc.publisherSpringer New York
dc.relationEC/H2020/952314/Adaption strategies in forestry under global climate change impact/ASFORCLIC
dc.relation.ispartofWood Science and Technology
dc.relation.urihttps://doi.org/10.1007/s00226-023-01488-0
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectwood carbonizationen
dc.subjectwood modificationen
dc.subjectwood charringen
dc.subjectsurface treatmenten
dc.subjectsurface qualityen
dc.titleEvaluating the quality of surface carbonized woods modified with a contact charring or a gas flame charring techniqueen
dc.typeJ_ČLÁNEK
dc.date.updated2023-12-14T01:03:21Z
dc.description.versionOA-hybrid
local.identifier.doi10.1007/s00226-023-01488-0
local.identifier.scopus2-s2.0-85171272478
local.identifier.wos001066767600001
local.number6
local.volume57
local.identifier.obd43925442
local.identifier.e-issn1432-5225
dc.project.ID952314
dc.project.IDAdaption strategies in forestry under global climate change impact (ASFORCLIC)
dc.identifier.orcidDömény, Jakub 0000-0001-5233-2275
dc.identifier.orcidŠeda, Vít 0000-0002-2406-0257
local.contributor.affiliationLDF
local.horizonH_2020


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Except where otherwise noted, this item's license is described as CC BY 4.0