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vol.18 número2Influence of wood sample size and species on the leaching of chromium and copper using different lab testsEffect of the Brazilian thermal modification process on the chemical composition of Eucalyptus grandis juvenile wood: Part 2: Solubility and ash content índice de autoresíndice de materiabúsqueda de artículos
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Maderas. Ciencia y tecnología

versión On-line ISSN 0718-221X

Resumen

BATISTA, Djeison Cesar et al. Effect of the Brazilian thermal modification process on the chemical composition of Eucalyptus grandis juvenile wood: Part 1: Cell wall polymers and extractives contents. Maderas, Cienc. tecnol. [online]. 2016, vol.18, n.2, pp.273-284. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2016005000025.

This article reports the first study of the influence of the Brazilian process of thermal modification called VAP HolzSysteme® on the chemical composition of Eucalyptus wood. Flatsawn boards of Eucalyptus grandis juvenile wood were tested for four treatment levels: untreated and thermally modified at final cycle temperatures of 140, 160 and 180 °C. Chemical analyses were carried out according to the standards of the Technical Association of the Pulp and Paper Industry and encompassed total extractives, insoluble lignin, holocellulose (cellulose + hemicelluloses) and solvent soluble extractives in water (cold and hot) and ethanol:toluene (1:2 v.v.) mixture. The chemical composition of thermally modified Eucalyptus grandis juvenile wood was significantly changed by the VAP HolzSysteme® process compared to untreated wood. Only the wood thermally modified at final cycle temperature of 180 °C was significantly different for all the chemical analyses performed compared to untreated wood.

Palabras clave : Extractives content; holocellulose; insoluble lignin; VAP HolzSysteme®.

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