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Colour responses from wood, thermally modified in superheated steam and pressurized steam atmospheres
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
Department of Forest Products, Swedish University of Agricultural Sciences, Uppsala.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.ORCID-id: 0000-0002-7711-9267
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
2010 (engelsk)Inngår i: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 5, nr 3, s. 211-219Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this study, two different methods were used to produce thermally modified wood. One was carried out in a typical kiln drying chamber using superheated steam (SS) and the other used pressurized steam in an autoclave cylinder (PS). Overall, both processes followed the same principles and the wood was not treated with any chemicals. Two wood species were studied, Scots pine (Pinus sylvestris) and Norway spruce (Picea abies). Treatments in the autoclave were carried out under pressure using temperatures of 160°C, 170°C and 180°C. Temperatures of 190°C and 212°C were used in treatments in the chamber at normal air pressure. The colour was measured using L*C*H colour space. Results for both species showed that similar L* (lightness) can be reached at lower (20-308C) temperatures using PS compared with SS treatment. The hue angle of PS-treated wood was smaller than that of SS-treated wood. No significant difference in C* (chroma) was detected. The difference in E value between PS- and SS-treated wood was smaller for Norway spruce than for Scots pine. The residual moisture content was about 10% higher in wood treated by the PS process compared with the SS process

sted, utgiver, år, opplag, sider
2010. Vol. 5, nr 3, s. 211-219
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Träfysik
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URN: urn:nbn:se:ltu:diva-5042DOI: 10.1080/17480272.2010.520739Scopus ID: 2-s2.0-78649531225Lokal ID: 30faa350-0699-11e0-b767-000ea68e967bOAI: oai:DiVA.org:ltu-5042DiVA, id: diva2:977916
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Validerad; 2010; 20101213 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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