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Published in: Wood Science and Technology 1/2014

01-01-2014 | Original

Color and surface chemistry changes of extracted wood flour after heating at 120 °C

Authors: Yao Chen, Mandla A. Tshabalala, Jianmin Gao, Nicole M. Stark, Yongming Fan

Published in: Wood Science and Technology | Issue 1/2014

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Abstract

To investigate the effect of heat on color and surface chemistry of wood flour (WF), unextracted, extracted and delignified samples of commercial WF were heated at 120 °C for 24 h and analyzed by colorimetry, diffuse reflectance visible (DRV), attenuated total reflectance Fourier transform infrared (ATR-FTIR) and Fourier transform Raman (FT-Raman) spectroscopies. Unextracted samples showed a slight increase in CIEL*a*b* color coordinates, a * and b *. Compared with unextracted samples, color changes of the extracted samples varied with composition of the extraction solvents with generally smaller increases in a * and larger decreases in b * values. Delignified samples were marked by even larger increases in both a * and b * values. The color changes could be explained by analysis of the respective DRV, FTIR and FT-Raman spectra of the samples before and after heating. Heating of the extracted WF at 120 °C resulted in a red shift of the absorption at 430 nm and increase in absorption in the violet-blue spectral region of visible light. Delignified samples showed even more pronounced absorption in this spectral region after heating.

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Metadata
Title
Color and surface chemistry changes of extracted wood flour after heating at 120 °C
Authors
Yao Chen
Mandla A. Tshabalala
Jianmin Gao
Nicole M. Stark
Yongming Fan
Publication date
01-01-2014
Publisher
Springer Berlin Heidelberg
Published in
Wood Science and Technology / Issue 1/2014
Print ISSN: 0043-7719
Electronic ISSN: 1432-5225
DOI
https://doi.org/10.1007/s00226-013-0582-3

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