CHEMICAL CHANGES OF HEAT TREATED PINE AND EUCALYPT WOOD MONITORED BY FTIR

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dc.creatorB Esteves
dc.creatorH Pereira
dc.creatorI Domingos
dc.creatorA Velez
dc.date2013
dc.date.accessioned2026-07-07T04:37:24Z
dc.descriptionA hardwood, Eucalyptus globulus Labill., and a softwood Pinus pinaster Aiton., were heat treated at temperatures between 170 and 210ºC in an oven and in an autoclave. The samples were pre-extracted with dichloromethane, ethanol and water and ground prior to Fourier Transform Infrared (FTIR) spectroscopic analysis.The heat treatment caused significant changes in the chemical composition and structure of wood, in lignin and polysaccharides. Hemicelluloses were the first to degrade as proved by the initial decrease of the 1730 cm-1 peak due to the breaking of acetyl groups in xylan. Hardwood lignin changed more than softwood lignin, with a shift of maximum absorption from 1505 cm-1 to approximately 1512 cm-1 due to decrease of methoxyl groups, loss of syringyl units or breaking of aliphatic side-chains. The macromolecular structure becomes more condensed and there is a clear increase of non-conjugated (1740 cm-1) in relation to conjugated groups (1650 cm-1). However, the changes induced by the thermaltreatment are difficult to monitor by FTIR spectroscopy due to the different chemical reactions occurring simultaneously.
dc.formatapplication/pdf
dc.identifier0717-3644
dc.identifierhttps://www.redalyc.org/articulo.oa?id=48527705010
dc.identifier10.4067/S0718-221X2013005000020
dc.identifier.urihttp://hdl.handle.net/123456789/467252
dc.languageen
dc.publisherUniversidad del Bío Bío
dc.relationhttp://www.redalyc.org/revista.oa?id=485
dc.rightsMaderas. Ciencia y Tecnología
dc.sourceMaderas. Ciencia y Tecnología (Chile) Num.2 Vol.15
dc.subjectAgrociencias
dc.titleCHEMICAL CHANGES OF HEAT TREATED PINE AND EUCALYPT WOOD MONITORED BY FTIR
dc.typeartículo científico

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