Document Type : Research Paper

Author

Assistant Professor at Department of Wood Science and Technology, Faculty of Materials Engineering and New Technologies, University of Shahid Rajaee Teacher Training, Tehran, Iran

Abstract

The present study was carried out with the aim of thermal analysis of furfurylated wood produced from beech (Fagus orientalis) and fir (Abies alba). In this regard, the specimens were saturated with two different levels of furfurylation in the form of low levels (14% fir and 20% beech) and high levels (38% fir and 65% beech), and compared with control samples. The results showed that changes in the TGA and DTA thermograms occur with an increase in the furfurylation level. In the first section of TGA graphs, thermal stability of the wood increased with furfurylation and its level change due to decreased water absorption and evaporation of gases during the process of furfurylation. But in the second and third regions, because of the replacement of furfuryl alcohol with lower thermal stability and flammability in the structure of wood and changes in the chemical structure of the wood, the thermal stability of wood polymers in both species decreased. The results of the analysis of DTA thermograms, in addition to confirming the findings from the TGA analysis, made clear the results of the impact of wood species on the thermal stability of wood polymers. Due to the difference in cellulose and hemicellulose and lignin in the structure of softwoods and hardwoods, the hemi-cellulose type in two species and the thermal stability difference of different implementation, wood polymers from two beech and fir are different in the variation of the surface under the curve of the DTA thermograms, the initial temperatures and peak temperatures.

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Beall, F.C., 1969. Thermogravimetric Analysis of Wood Lignin and Hemicelluloses. Wood and Fiber Science, 3(3):215-226.
Brown, M. E., 2001. Thermal Analysis Techniques and Applications Technology & Engineering. Kluwer Academic Publishers, 264p.
Esteves, B., Nunes, L. and Pereira, H., 2011. Properties of furfurylated wood (Pinus pinaster). European Journal of Wood and Wood Products, 69:521-525
Goldstein, I.S., 1955. The impregnation of wood to impart resistance to alkali and acid. Forest Product Journal, 5(4): 265-267.
Goldstein, I.S. and Dreher W.A., 1960. Stable furfuryl alcohol impregnation solutions. Industrial & Engineering Chemistry Research, 52(1):57-58.
Khodabandehloo, H. and Azadfallah, M., 2016. Thermal Stability of Cyanoethylated Cellulose Nanofiber. Nashrieh Shimi va Mohandesi Shimi Iran (NSMSI), 35(1): 91-97
Lande, S., Westin, M. and Schneider, M., 2004. Chemistry and ecotoxicology of furfurylated wood. Scandinavian Journal of Forest Research, 19(Suppl 5): 14-21.
Lande, S., Westin, M. and Schneider M., 2004. Properties of furfurylated wood. Scandinavian Journal of Forest Research, 19(Suppl 5): 22-30.
Navi, P., and Sandberg, D., 2011. The Thermo-hydro-mechanical Processing of Wood. Taylor & Francis Group, LLC, 357p.
Revzvani, R., The effect of furfurylation on physical & mechanical properties of Poplar wood, in MSc thesis of Forestry and wood Technology, 2010, Gorgan University of Agricultural Sciences and Natural Resources: Gorgan.    
Schneider, M.H., 1995. New cell wall and cell lumen wood polymer composites. Wood Science and Technology, 29: 121-127.
Sjostrom E., 1981. Wood Chemistry; Fundamentals and Applications. Academic Press, 258p
Stamm, A.J., 1964. wood and cellulose science. Ronald Press, New York, 549p.
Talaei, A., Zare, M.S. and Abdolzadeh, H., 2016. Effect of furfurylation on shear strength of bond line and screw withdrawal resistance of beech and fir. 31(3): 446-457.
Wesley W. W., 1986. Thermal Analysis, third edition. Wiley-Interscience John. 832 p.