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Surface densification of acetylated wood
KTH Royal Institute of Technology, Sweden.
RISE., SP – Sveriges Tekniska Forskningsinstitut. KTH Royal Institute of Technology, Sweden.ORCID-id: 0000-0001-7014-6230
KTH Royal Institute of Technology, Sweden.
Aalto University, Finland.
Vise andre og tillknytning
2016 (engelsk)Inngår i: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 74, nr 6, s. 829-835Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The mechanical properties of wood can be improved by compressing its porous structure between heated metal plates. By adjusting the process parameters it is possible to target the densification only in the surface region of wood where the property improvements are mostly needed in applications, such as flooring. The compressed form is, however, sensitive to moisture and will recover to some extent in high humidity. In this study, therefore, acetylated radiata pine was utilised in the surface densification process in order to both reduce the set-recovery of densified wood and to improve the hardness of the acetylated wood. Pre-acetylation was found to significantly reduce the set-recovery of surface densified wood. However, after the second cycle the increase in set-recovery of acetylated wood was relatively higher than the un-acetylated wood. The acetylated samples were compressed by only 1 mm (instead of the target 2 mm), yet, the hardness and hardness recovery of the acetylated samples significantly increased as a result of densification. It was also discovered that rough (un-planed) surfaces may be surface densified, however, even if the surface became smooth to the touch, the appearance remained uneven.

sted, utgiver, år, opplag, sider
2016. Vol. 74, nr 6, s. 829-835
Emneord [en]
Acetylation, Densification, Hardness, Recovery, Acetylated wood, Densified wood, Mechanical properties of wood, Porous structures, Process parameters, Property improvement, Surface densification, Surface region, Wood
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Identifikatorer
URN: urn:nbn:se:ri:diva-27590DOI: 10.1007/s00107-016-1077-3Scopus ID: 2-s2.0-84976477767OAI: oai:DiVA.org:ri-27590DiVA, id: diva2:1057863
Tilgjengelig fra: 2016-12-19 Laget: 2016-12-19 Sist oppdatert: 2020-12-01bibliografisk kontrollert

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