Influence of Temperature and Holding Time in Oil Heat Treatment on Physical and Mechanical Properties of Fir Wood (Abies Sp.)

Document Type : Research Paper

Authors

1 Graduated M.Sc, Student, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran

2 Associate Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran

3 Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran

Abstract

Influences of temperature as well as holding time on physical and mechanical properties of Fir wood were studied in this work during the oleothermal wood modification. Wood samples were cut and treated oleothermally in the soybean oil at 200 and 230°C for the holding time of 1, 3 and 5 hours. Weights and the dimensions were measured before and after treatment. Bending strengths, water absorption and swelling, dry density and the impact load resistance (un-notched) were determined in the samples. Results revealed that the oleothermal treatment of wood had no significant effects on the density. Dimensions and the weights were reduced significantly in the treated wood. There was more reduction in the radial dimension than that of the tangential one. It means that wood was collapsed in this direction after treatment. Reductions in the water and moisture absorption as well as the swelling were determined in the samples. Bending tests revealed reduction in moduli of the elasticity and the rupture. There was no significant change in the impact load resistance of the treated samples.

Keywords


 
[1]. Hill, C. (2006). Wood Modification, Chemical, Thermal and Other Processes. Wiley, Chichester, 239 p.
[2]. Weiland, J. J. and Guyonnet, R. (2003). Study of chemical modifications and fungi degradation of thermally modified wood using DRIFT spectroscopy. Holz als Roh und Werkstoff, 61 (3): 216-221.
[3]. Homan, W. J. and Jorissen, A. J. M. (2004). Wood modification developments. HERON, 49(4): 361-386.
[4]. Mohebby, B. and Sanaei, I. (2005). Influences of the hydro-thermal treatment on physical properties of beech wood (Fagus orientalis). 36th Annual Meeting Bangalore, India: 24-28.
[5]. Mitchell, P. (1988). Irreversible property changes of small loblolly pine specimens heated in air, nitrogen, or oxygen. Wood and Fiber Science, 20(3): 320-335.
[6]. Wang, J. (2007). Initiating evaluation of thermal-oil treatment for post-MPB lodgepole pine. forintek canada corp. Western Division 2665 East Mall Vancouver, British Columbia V6T 1W5, P: 41.
[7]. Windeisen, E., Strobel, C., and Wegener, G. (2007). Chemical changes during the production of thermo-treated beech wood. Wood Science and Technology, 41(6): 523-536.
[8]. Manalo, R. D. and Acda, M. N. (2009). Effects of hot oil treatment on physical and mechanical properties of three species of Philippine bamboo. Journal of Tropical Forest Science, 21: 19-24.
[9]. Korkut, D., Korkut, S., Bekar, I., Budakçi, M., Dilik, T., and Çakicier, N. (2008). The effects of heat treatment on the physical properties and surface roughness of Turkish Hazel (Corylus colurna L.) wood. International Journal of Molecular Sciences, 9: 1772-1783.
[10]. Hyvönen, A., Piltonen, P., and Niinimäki, J. (2006). Tall oil/water-emulsions as water repellents for scots pine sapwood. European Journal of Wood and Wood Products, 65(5): 68-73.
[11]. Tremblay, C. and Baribeault, J. (2009). Physical and mechanical properties of thermally modified aspen wood. the 4th european conference on wood modification. April 27-29, Stockholm, Sweden: 231-234.
[12]. Yildiz, S., Gezer, E., and Yildiz, U. (2006). Mechanical and chemical behavior of spruce wood modified by heat. Building and Environment, 41: 1762-1766.
[13]. Kortelainen, S., Antikainen, T., and Viitaniemi, P. (2005). The water absorption of sapwood and heartwood of scots pine and norway spruce heat-treated at 170°C, 190°C, 210°C and 230°C. European Journal of Wood and Wood Products, 64: 192-197.
[14]. Boonstra, M., Acker, J., TJEERDSMA, B., and Kegel, E. (2007). Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents. Annals of Forest Science, 64(7): 679-690.
[15]. American Society for Testing and Materials, ASTM D 2395-02: Standard Test Methods for Specific Gravity of Wood and Wood-Based Materials.
[16]. Mirzaei, G., Mohebby, M., and Tasooji, M. (2012). The effect of hydrothermal treatment on bond shear strength of beech wood. European Journal of Wood and Wood Products, 70(5): 705-709.
[17]. American Society for Testing and Materials, ASTM D 143-94. Testing Small Clear Timber Specimens.
[18]. American Society for Testing and Materials, ASTM D 256-04. Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics.
[19]. Esteves, B. M. and Pereira, H. M. (2009). Wood modification by heat treatment: A review. BioResources, 4(1): 370-404.
[20]. Hietala, S., Maunu, S. L., Sundholm, F., Jämsä, S., and Viitaniemi, P. (2002). Structure of thermally modified wood studied by liquid state nmr measurements. Holzforschung, 56:522-528.
[21]. Sundqvist, B. (2004). Color changes and acid formation in wood during heating. Doctoral Thesis, Luleå University of Technology, Sweden: P 50.
[22]. Boonstra, MJ., Van Acker, J., Tjeerdsma, BF., and Kegel, EV. (2007) Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents. Annals of Forest Science, 64: 679-690.
[23]. Wang, J. Y. and Cooper, P. A. (2005). Effect of oil type, temperature and time on moisture properties of hot oil-treated wood. Holz als Roh-und Werkstoff, 63: 417-422.
[24]. Mirzaei, G. (2011). Effect of hydrothermal treatment on bond shear strength in beech (fagus orientalis) and paulownia (paulownia fortunei) woods, MSc. Thesis, Tarbiat Modares University, Faculty of Natural Resources: P. 83.
[25]. Garrote, G., Dominiguez, H., and Parajó, J. C. (1999). Hydrothermal processing of lignocellulosic materials. Holz als Roh- und Werkstoff, 57 (3): 191-202.
[26]. Winandy, J. E. and Rowell, R. M. (2005). Chemistry of Wood Strength. Handbook of Wood Chemistry and Wood Composites, CRC Press LLC. Boca Raton London New York  Washington, D C, pp. 303-347.
[27]. Birkinshaw, C. and Dolan, S. (2009). Mechanism of strength loss in heat treated softwoods. European Conference on Wood Modification, 337-434.
[28]. Sailer, M., Rapp, A. O., and Leithoff, H. (2000). Improved resistance of scots pine and spruce by application of an oil-heat treatment. The International Research Group on Wood Preservation, IRG Document No. IRG/WP00–40162.
[29]. Mirzaei, G., Mohebby, B., and Tabarsa, T. (2013). Collapsibility and wettability of hydrothermally treated wood. Iranian Journal of Wood and Paper Industries, 3(1): 1-11.
[30]. Tjeerdsma, B. F., Boonstra, M., Pizzi, A., Tekely, P., and Militz, H. (1998). Characterization of thermal modified wood: molecular reasons for wood performance improvement. cpmas 13 c nmr characterization of thermal modified wood. Holz als Roh-und Werkstoff, 56: 149-153.