Chemical changes of cell wall components of heat-treated wood / Alterações químicas dos componentes da parede celular de madeiras tratadas termicamente

Carolina Rodrigues Barroco, Danielle Affonso Sampaio, Renata Nunes Oliveira, Alexandre Miguel do Nascimento


The wood’s cell wall undergoes chemical modifications due to thermal action. The goal of this work was to analyze these changes in the Pinus caribaea var. caribaea and Khaya ivorensis, untreated and heat treated. The thermal treatment temperatures were 160° C, 180° C and 200° C, and the samples were then evaluated by Fourier transform infrared spectroscopy (FTIR). Fourier transform infrared spectroscopy analyzes were performed on samples with and without treatment, using a spectrometer in the Attenuated Total Reflectance (ATR) mode. The results were plotted in the Origin-Pro 8 program, obtaining comparison charts. In treated and untreated samples, the bands at ~1027cm-1 and ~3337cm-1 were more intense with increasing temperature. It suggests that the structural elements degraded, and small molecules were then obtained. It is concluded that the increase in temperature implied a greater absorption of infrared by the peaks related to cellulose, hemicelluloses, and lignin, indicating that they are undergoing changes.


Thermoretification, Pinus, African Mahogany, FTIR, Commercial Wood.

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