Changes in the Chemical Composition and Decay Resistance of Thermally-Modified Hevea brasiliensis Wood

Autor(es)

Durgante Severo, Elias Taylor ^{[1, 2, 3]} ; Calonego, Fred Willians ^[1] ; Sansigolo, Claudio Angeli ^[1] ; Bond, Brian ^{[2, 4]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Fac Agr Sci, Dept Forest Sci, Sao Paulo - Brazil

^[2] Virginia Tech, Brooks Forest Prod Ctr, Dept Sustainable Biomat, Blacksburg, VA - USA

^[3] Fazenda Expt Lageado, Fac Agr Sci, Dept Forest Sci, POB 237, BR-18603970 Botucatu, SP - Brazil

^[4] Virginia Polytech Inst & State Univ, Brooks Forest Prod Ctr, 1650 Ramble Rd, Blacksburg, VA 24061 - USA

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 11, n. 3 MAR 17 2016.
• Citações Web of Science: 11

Resumo

In this study the effect of thermal treatment on the equilibrium moisture content, chemical composition and biological resistance to decay fungi of juvenile and mature Hevea brasiliensis wood (rubber wood) was evaluated. Samples were taken from a 53-year-old rubber wood plantation located in Tabapua, Sao Paulo, Brazil. The samples were thermally-modified at 180 degrees C, 200 degrees C and 220 degrees C. Results indicate that the thermal modification caused: (1) a significant increase in the extractive content and proportional increase in the lignin content at 220 degrees C; (2) a significant decrease in the equilibrium moisture content, holocelluloses, arabinose, galactose and xylose content, but no change in glucose content; and (3) a significant increase in wood decay resistance against both Pycnoporus sanguineus (L.) Murrill and Gloeophyllum trabeum (Pers.) Murrill decay fungi. The greatest decay resistance was achieved from treatment at 220 degrees C which resulted in a change in wood decay resistance class from moderately resistant to resistant. Finally, this study also demonstrated that the influence of thermal treatment in mature wood was lower than in juvenile wood. (AU)

• Processo FAPESP: 13/15372-0 - Desenvolvimento de programa de modificação térmica para Hevea brasiliensis, caracterização química e estudo da degradação biológica da madeira
• Beneficiário: Elias Taylor Durgante Severo
• Modalidade de apoio: Bolsas no Exterior - Pesquisa