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Quality control of thermally modified timber using dynamic vapor sorption (DVS) analysis [Elektronski vir]Humar, Miha ...The importance of thermal modification is increasing worldwide. Increased use of thermally modified timber (TMT) has resulted in a need for reliable quality control, comprising control of variation ... of the production within defined limits, allowing third-party control in the case of certification and the regulation of customer complaints and claims. Techniques are thus needed to characterise the modification of quality in terms of improved target properties of TMT during industrial production, and of TMT products that have been in service for an arbitrary time. In this study, we aimed to utilise dynamic vapor sorption (DVS) for this purpose. Norway spruce (Picea abies) and European beech (Fagus sylvatica) samples were thermally modified at different temperatures according to different heat treatment techniques: (1) the Silvapro process based on an initial vacuum; (2) an air heat treatment, whereby samples were wrapped in aluminium foil; (3) thermal modification of wood samples in the ambient atmosphere in a laboratory oven. Wood samples from closed processes were analysed for validation. TMT was characterised with respect to mass loss, colour and density. Mass loss of wood due to modification (MLTM) was correlated with factors derived from DVS analysis. The present DVS measurements suggest that the equilibrium wood moisture content (EMC95% RH), the time to reach 10% wood moisture content (t10% MC), and the elongation factor, c, derived from a logarithmic function, can serve as alternative parameters to characterise the quality of several thermal modification processes. Further studies are recommended using other wood species, different modification processes and further parameters gained from DVS measurements to understand the robustness and the predictive power of the applied techniqueSource: Forests [Elektronski vir]. - ISSN 1999-4907 (Vol. 11, iss. 6, 2020, str. 1-12)Type of material - e-articlePublish date - 2020Language - englishCOBISS.SI-ID - 19360259
Author
Humar, Miha |
Repič, Rožle |
Kržišnik, Davor |
Lesar, Boštjan |
Cerc Korošec, Romana |
Brischke, Christian |
Emmerich, Lukas |
Rep, Gregor
Topics
termična modifikacija |
kontrola kakovosti |
dinamična sorpcija vodne pare |
les |
vlažnost lesa |
thermal modification |
quality control |
dynamic vapour sorption |
wood |
moisture content
Author | Humar, Miha ... |
Title | Quality control of thermally modified timber using dynamic vapor sorption (DVS) analysis [Elektronski vir] |
Publication date | 2020-06-11 |
COBISS.SI-ID | 19360259 |
Publication version in repository | Publisher's version |
Publication licence | Creative Commons Attribution 4.0 International |
Embargo | Immediate publication for public |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
---|---|---|---|
Obnašanje lesa in lignoceluloznih kompozitov v zunanjih pogojih | L4-7547-2016 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Les in lignocelulozni kompoziti | P4-0015-2015 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Wood and wood products over a lifetime | WOOLF | OP20.03520 | |
IC za pripravo, staranje in terensko testiranje lesa ter lignoceluloznih materialov | OC LES PST | 0481-09 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
Trajnostno in inovativno gradbeništvo za pametne stavbe | TIGR4smart | C3330-16-52900 |
Ministrstvo za izobraževanje, znanost in šport European Regional Development Fund |
Files that belong to the publication
Link |
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https://www.mdpi.com/1999-4907/11/6/666 |
https://repozitorij.uni-lj.si/IzpisGradiva.php?id=133934 |
https://dirros.openscience.si/IzpisGradiva.php?id=16885 |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Humar, Miha | 19106 |
Repič, Rožle | 51944 |
Kržišnik, Davor | 37425 |
Lesar, Boštjan | 28503 |
Cerc Korošec, Romana | 16256 |
Brischke, Christian | |
Emmerich, Lukas | |
Rep, Gregor | 20964 |
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