izpis_h1_title_alt

Quality control of thermally modified timber using dynamic vapor sorption (DVS) analysis
ID Humar, Miha (Avtor), ID Repič, Rožle (Avtor), ID Kržišnik, Davor (Avtor), ID Lesar, Boštjan (Avtor), ID Cerc Korošec, Romana (Avtor), ID Brischke, Christian (Avtor), ID Emmerich, Lukas (Avtor), ID Rep, Gregor (Avtor)

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Izvleček
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 (ML$_{TM}$) was correlated with factors derived from DVS analysis. The present DVS measurements suggest that the equilibrium wood moisture content (EMC$_{95\%}$ $_{RH}$), the time to reach 10% wood moisture content (t$_{10\%}$ $_{MC}$), 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 technique.

Jezik:Angleški jezik
Ključne besede:thermal modification, quality control, dynamic vapour sorption, wood, moisture content
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Leto izida:2020
Status objave pri reviji:Objavljeno
Verzija članka:Založnikova različica članka
Št. strani:12 str.
Številčenje:Vol. 11, iss. 6, art. 666
PID:20.500.12556/RUL-133934 Povezava se odpre v novem oknu
UDK:630*8
ISSN pri članku:1999-4907
DOI:10.3390/f11060666 Povezava se odpre v novem oknu
COBISS.SI-ID:19360259 Povezava se odpre v novem oknu
Datum objave v RUL:20.12.2021
Število ogledov:254
Število prenosov:98
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Forests
Skrajšan naslov:Forests
Založnik:MDPI
ISSN:1999-4907
COBISS.SI-ID:3872166 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:11.06.2020

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:termična modifikacija, kontrola kakovosti, dinamična sorpcija vodne pare, les, vlažnost lesa

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:L4-7547
Naslov:Obnašanje lesa in lignoceluloznih kompozitov v zunanjih pogojih

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P4-0015
Naslov:Les in lignocelulozni kompoziti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:IC LES PST 0481-09

Financer:Drugi - Drug financer ali več financerjev
Številka projekta:C3330-16-529003
Naslov:Sustainable and Innovative Construction of Smart Buildings
Akronim:TIGR4smart

Financer:Drugi - Drug financer ali več financerjev
Številka projekta:OP20.03520
Naslov:Wood Products over a Lifetime
Akronim:WOOLF

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