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Acetylation and densification of wood
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.ORCID iD: 0000-0001-8514-5409
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials. SP Tech Res Inst Sweden.ORCID iD: 0000-0001-7014-6230
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.ORCID iD: 0000-0002-9156-3161
Department of Forest Products Technology, Aalto University.
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2015 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The purpose of this study was to explore the possibility to surface densify acetylated solid wood. The aim of surface densification is to improve mechanical properties, such as hardness, at the very surface of wood where the property improvements are mostly needed (e.g. in flooring and decking). However, when subjected to moisture, surface densified wood may swell back almost to the original dimensions. Therefore, acetylated and non-acetylated wood was surface densified in order to investigate whether the dimensional stability of densified wood may be improved by pre-acetylation. Surface densification was performed by compressing the acetylated radiate pine samples between metal plates with only one side heated (150°C) in order to target the deformation to one surface only. The original thickness of the samples was 20 mm and the target thickness 18 mm which was controlled by metal stops. The recovery of the deformation (set-recovery) was measured by soaking the samples in water and measuring the oven-dry thickness before and after soaking in repeated cycles. It was found that acetylated wood may be surface densified and indeed the set-recovery of the pre-acetylated wood was significantly lower (17.4 %) compared to non-acetylated wood (72.8 %). Further studies in adjusting the process parameters might lead to even higher reduction in set-recovery.

Place, publisher, year, edition, pages
2015.
Keywords [en]
acetylation, densification, moisture content, set-recovery
National Category
Wood Science
Identifiers
URN: urn:nbn:se:kth:diva-205574OAI: oai:DiVA.org:kth-205574DiVA, id: diva2:1089262
Conference
11th Meeting of the Northern European Network for Wood Science and Engineering – WSE. 14.-15.9.2015, Poznan, Poland
Note

The authors would like to acknowledge Accsys Technologies (Chiel Lankveld, Ferry Bongers and John Alexander) for providing the wood material for this study and giving comments during the writing process. QC 20170424

Available from: 2017-04-19 Created: 2017-04-19 Last updated: 2017-04-24Bibliographically approved

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CiteExportLink to record
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  • apa
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