Particleboards from Recycled Thermally Modified Wood

In recent years, the production and consumption of thermally modified wood (TMW) has been increasing. Offcuts and other waste generated during TMWs processing into products, as well as already disposed products based on TMWs can be an input recycled raw material for production of particleboards (PBs...

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Autores principales:	Ján Iždinský, Zuzana Vidholdová, Ladislav Reinprecht
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	particleboards thermally modified wood recycled wood physical and mechanical properties decay and mould resistance FTIR Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/e789a4d1d9b5482b86f9c1f1344d08ec
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spelling	oai:doaj.org-article:e789a4d1d9b5482b86f9c1f1344d08ec2021-11-25T17:37:31ZParticleboards from Recycled Thermally Modified Wood10.3390/f121114621999-4907https://doaj.org/article/e789a4d1d9b5482b86f9c1f1344d08ec2021-10-01T00:00:00Zhttps://www.mdpi.com/1999-4907/12/11/1462https://doaj.org/toc/1999-4907In recent years, the production and consumption of thermally modified wood (TMW) has been increasing. Offcuts and other waste generated during TMWs processing into products, as well as already disposed products based on TMWs can be an input recycled raw material for production of particleboards (PBs). In a laboratory, 16 mm thick 3-layer PBs bonded with urea-formaldehyde (UF) resin were produced at 5.8 MPa, 240 °C and 8 s pressing factor. In PBs, the particles from fresh spruce wood and mixed particles from offcuts of pine, beech, and ash TMWs were combined in weight ratios of 100:0, 80:20, 50:50 and 0:100. Thickness swelling (TS) and water absorption (WA) of PBs decreased with increased portion of TMW particles, i.e., TS after 24 h maximally about 72.3% and WA after 24 h maximally about 64%. However, mechanical properties of PBs worsened proportionally with a higher content of recycled TMW—apparently, the modulus of rupture (MOR) up to 55.5% and internal bond (IB) up to 46.2%, while negative effect of TMW particles on the modulus of elasticity (MOE) was milder. Decay resistance of PBs to the brown-rot fungus <i>Serpula lacrymans</i> (Schumacher ex Fries) S.F. Gray increased if they contained TMW particles, maximally about 45%, while the mould resistance of PBs containing TMW particles improved only in the first days of test. In summary, the recycled TMW particles can improve the decay and water resistance of PBs exposed to higher humidity environment. However, worsening of their mechanical properties could appear, as well.Ján IždinskýZuzana VidholdováLadislav ReinprechtMDPI AGarticleparticleboardsthermally modified woodrecycled woodphysical and mechanical propertiesdecay and mould resistanceFTIRPlant ecologyQK900-989ENForests, Vol 12, Iss 1462, p 1462 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	particleboards thermally modified wood recycled wood physical and mechanical properties decay and mould resistance FTIR Plant ecology QK900-989
spellingShingle	particleboards thermally modified wood recycled wood physical and mechanical properties decay and mould resistance FTIR Plant ecology QK900-989 Ján Iždinský Zuzana Vidholdová Ladislav Reinprecht Particleboards from Recycled Thermally Modified Wood
description	In recent years, the production and consumption of thermally modified wood (TMW) has been increasing. Offcuts and other waste generated during TMWs processing into products, as well as already disposed products based on TMWs can be an input recycled raw material for production of particleboards (PBs). In a laboratory, 16 mm thick 3-layer PBs bonded with urea-formaldehyde (UF) resin were produced at 5.8 MPa, 240 °C and 8 s pressing factor. In PBs, the particles from fresh spruce wood and mixed particles from offcuts of pine, beech, and ash TMWs were combined in weight ratios of 100:0, 80:20, 50:50 and 0:100. Thickness swelling (TS) and water absorption (WA) of PBs decreased with increased portion of TMW particles, i.e., TS after 24 h maximally about 72.3% and WA after 24 h maximally about 64%. However, mechanical properties of PBs worsened proportionally with a higher content of recycled TMW—apparently, the modulus of rupture (MOR) up to 55.5% and internal bond (IB) up to 46.2%, while negative effect of TMW particles on the modulus of elasticity (MOE) was milder. Decay resistance of PBs to the brown-rot fungus <i>Serpula lacrymans</i> (Schumacher ex Fries) S.F. Gray increased if they contained TMW particles, maximally about 45%, while the mould resistance of PBs containing TMW particles improved only in the first days of test. In summary, the recycled TMW particles can improve the decay and water resistance of PBs exposed to higher humidity environment. However, worsening of their mechanical properties could appear, as well.
format	article
author	Ján Iždinský Zuzana Vidholdová Ladislav Reinprecht
author_facet	Ján Iždinský Zuzana Vidholdová Ladislav Reinprecht
author_sort	Ján Iždinský
title	Particleboards from Recycled Thermally Modified Wood
title_short	Particleboards from Recycled Thermally Modified Wood
title_full	Particleboards from Recycled Thermally Modified Wood
title_fullStr	Particleboards from Recycled Thermally Modified Wood
title_full_unstemmed	Particleboards from Recycled Thermally Modified Wood
title_sort	particleboards from recycled thermally modified wood
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e789a4d1d9b5482b86f9c1f1344d08ec
work_keys_str_mv	AT janizdinsky particleboardsfromrecycledthermallymodifiedwood AT zuzanavidholdova particleboardsfromrecycledthermallymodifiedwood AT ladislavreinprecht particleboardsfromrecycledthermallymodifiedwood
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Particleboards from Recycled Thermally Modified Wood

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