Oil heat treatment of wood
2008 (English)In: Proceedings of the 4th Meeting of the Nordic-Baltic Network in Wood Material Science and Engineering (WSE), November 13 - 14, 2008, Riga, Latvia / [ed] Bruno Andersons, Riga, 2008Conference paper (Other academic)
The investigation of thermal treatment of wood has led to the improvement of heat treatment with vegetable oils. The aim of this work has been to study the oil absorption of wood during the process of oil heat treatment. This work has included the heat treatment of spruce, pine (heartwood and sapwood) and aspen in rape seed oil. The heat treatment was performed in the deep fryer at 180, 210 and 240°C during 30, 60 and 120 minutes. Two sets of samples were run, the first one was heat treated and left to cool in the air, the second one was heat treated and directly cooled in the oil bath for 1 hour. At 180°C there was a trend of increasing oil absorption during the heat treatment with the increasing the treatment time for all species. At 210°C the percentage of mass growth was reducing with increasing the time of the process. At 240°C all species lost the weight and the percentage of weight loss was increasing proportionally with increasing heat treatment time. During the heat treatment aspen had the highest mass increase and pine heartwood had the lowest. Results showed that wood absorbed significantly more oil in the stage of cooling in oil than during heat treatment. All species had a tendency to have approximately the same oil pick up during storing in the oil bath after the heat treatment at one temperature, so the heat treatment time did not have an effect on the oil absorption in the stage of cooling. The oil pick up during the stage of cooling had the lowest values for all species treated at 240°, because all the species lost the mass during the heat treatment at 240°. The colour changed during heat treatment and depended mainly on the heat treatment temperature. The darkness was increasing proportionally with increasing the thermal treatment temperature. The colour varied among the species.
Place, publisher, year, edition, pages
Research subject Wood Physics
IdentifiersURN: urn:nbn:se:ltu:diva-39645Local ID: e79edda5-7994-47f8-b330-1354d21101b1ISBN: 9789984396750OAI: oai:DiVA.org:ltu-39645DiVA: diva2:1013161
Meeting of the Nordic-Baltic Network in Wood Material Science and Engineering (WSE) : 13/11/2008 - 14/11/2008
Godkänd; 2008; 20140908 (katsid)2016-10-032016-10-03Bibliographically approved