Effect of different oil heat treatment conditions on chemical structure and physical properties of wingnut (Pterocarya fraxinifolia) wood

Document Type : Research Paper

Author

Assistant professor, Department of wood and lignocellulosic products, Natural Resources Faculty, agriculture and natural resources university, Sari, Iran

Abstract

Wood is one of the most important natural resources and its preservation is unavoidable for increasing the service life of wooden products. Wood modification with hot oil causes a steady transfer of heat into the wood and reduce its hydrophilicity through a chemical change of wood macromolecules. This study investigated the effect of oil heat treatment with linseed oil on the chemical structure and physical properties of wingnut wood. Specimens were heated at 140, 170, and 200 Cº for 2 and 4 hours. Results showed that water absorption of modified samples were lower than the control ones, and subsequently water absorption and thickness swelling of the modified samples decreased with increasing temperature. However, the time of modification had no significant effect. Also, Fourier-transform infrared (FTIR) analysis confirmed the reduction of hydroxyl groups in the modified samples, which this reduction was more sensible with increasing the temperature of modification.  

Keywords


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