The efficiency of pistacia atlantica gum for increasing resistance of rapeseed oil-heat treated wood to fungal attacks

Morad Mahmoud Kia ^[2] ; Asghar Tarmian ^[2] ; Ali Naghi Karimi ^[2] ; Hadi Gholamiyan ^[2] ; Ali Abdulkhani ^[2] ; Mohamad Reza Mastri Farahan ^[1]
1. [1] Gorgan University of Agricultural Sciences and Natural Resources
  
  Gorgan University of Agricultural Sciences and Natural Resources
  
  Irán
2. [2] Department of Wood and Paper Science and Technology.University of Tehran. Iran
Localización: Maderas: Ciencia y tecnología, ISSN 0717-3644, ISSN-e 0718-221X, Vol. 22, Nº. 4, 2020, págs. 457-466
Idioma: inglés
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Resumen
- In this research, we used Pistacia atlantica gum during cooling phase of oil-heat treatment of poplar wood (Populus deltoids) to improve its resistance to the white-rot fungus Trametes versicolor and growth of the mold fungus Penicillium expansum. Thermal modification was carried out using rapeseed oil at 180 °C, 200 °C and 220 °C for 2 hours and 4 hours. The modified wood specimens were then directly cooled in the oil containing 0 %, 5 % and 10 % (w/w) of the gum at 25 °C for 30 minutes. The chemical constituents of the essential oil extracted with a Clevenger type apparatus were determined by chromatography–mass spectrometry (GC-MS). The amounts of α-pinene, β-pineneand α-terpinolene of the essential oil were 60,2 %, 8,7 % and 3,9 %, respectively. The mold resistance was greatly improved, while the improvement against the decay fungus was only observed for the specimens modified at 180 °C. Our results confirmed that the enhanced fungal resistance was not only due to the presence of monoterpenes in the essential oil, but also to a further reduction in the hygroscopicity of the treated wood