BEHAVIOR OF THERMALLY MODIFIED WOOD TO BIODETERIORATION BY XYLOPHAGE FUNGI

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KARINE RAMOS DA ROSA BELLON PEDRO HENRIQUE RIBOLDI MONTEIRO http://orcid.org/0000-0003-1754-9721 RICARDO JORGE KLITZKE http://orcid.org/0000-0001-6839-9415 CELSO GARCIA AUER http://orcid.org/0000-0002-4916-2460 ALAN SULATO DE ANDRADE http://orcid.org/0000-0003-1574-9623

Abstract

Thermally modified wood undergoes chemical, physical and mechanical modifications, resulting in changes in resistance to wood biodegrading agents. The objective of this study was to evaluate the resistance to biodeterioration of thermally modified wood by the industrial process VAP HolzSysteme® of Eucalyptus  grandis, Pinus taeda and Tectona grandis, submitted to the Lentinula edodes fungi (brown rot)and Pleurotus djamor fungi (white rot), and to analyze the chemical properties before and after biodeterioration. Three treatments were considered for each species: Control - wood in natura, modified wood at 140 °C and 160 °C. The specimens were made according to ASTM D 1413 (ASTM, 1994) in which 36 specimens per treatment, in which 12 blocks were submitted to L. edodes fungus, 12 to P. djamor fungus, and 12 correction blocks. Different behaviors occurred among species under fungal action. For E. grandis wood the thermal modification increased the resistance to biodeterioration of the wood under the action of the L. edodes fungus, in the opposite way occurred for the species P. taeda. There was little variation between treatments in T. grandis wood for both fungi. It was concluded that the thermal modification conferred chemical alterations on the wood influencing their behavior in the biodeterioration by the fungal action in P. taeda species in a negative way, increasing the degradation level, and E. grandis in a positive way, reducing the biodeterioration. However, in T. grandis species no significant differences were identified in the different treatments by the action of different rotting fungi.

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BELLON, KARINE RAMOS DA ROSA et al. BEHAVIOR OF THERMALLY MODIFIED WOOD TO BIODETERIORATION BY XYLOPHAGE FUNGI. CERNE, [S.l.], p. 331-340, nov. 2020. ISSN 2317-6342. Available at: <http://cerne.ufla.br/site/index.php/CERNE/article/view/2409>. Date accessed: 01 dec. 2020.
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