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Influence of heat transferring media on durability of thermally modified wood
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.ORCID-id: 0000-0002-7711-9267
SP Technical Research Institute of Sweden.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
2011 (Engelska)Ingår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 6, nr 1, s. 356-372Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Studies on the durability and dimensional stability of a series of hardwoods and softwoods after thermal modification in vegetable oils and in steam atmospheres have been performed. Mass loss after exposure to Coniophora puteana (BAM Ebw. 15) for 16 weeks was very low for European birch, European aspen, Norway spruce, and Scots pine thermally modified in a linseed oil product with preservative (for 1 hour at 200 degrees C). Fairly low mass losses were obtained for wood thermally modified in linseed-, tung-and rapeseed oil, and losses were related to the wood species. Low mass loss during rot test was also found for Norway spruce and Scots pine modified in saturated steam at 180 degrees C. Water absorption of pine and aspen was reduced by the thermal treatments and the extent of reduction was dependent on wood species and thermal modification method. Thermally modified aspen was stable during cycling climate tests, whereas pine showed considerable cracking when modified under superheated steam conditions (Thermo D). At lower modification temperature (180 degrees C) an increase in mass after modification in rapeseed oil of spruce, aspen and sapwood as well as heartwood of pine was observed, whereas at high temperature (240 degrees C) a mass loss could be found. Oil absorption in room tempered oil after thermal modification in oil was high for the more permeable aspen and pine (sapwood).

Ort, förlag, år, upplaga, sidor
2011. Vol. 6, nr 1, s. 356-372
Nationell ämneskategori
Biomaterial
Forskningsämne
Träfysik
Identifikatorer
URN: urn:nbn:se:ltu:diva-8047Lokalt ID: 67d4a7d7-d350-45e8-bd7c-b14506c39053OAI: oai:DiVA.org:ltu-8047DiVA, id: diva2:980937
Anmärkning
Validerad; 2011; 20110415 (ysko)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2017-11-24Bibliografiskt granskad

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Karlsson, OlovSidorova, EkaterinaMorén, Tom

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