Title: FT-Raman investigation of milled-wood lignins : softwood, hardwood, and chemically modified black spruce lignins
Author: Agarwal, Umesh P.; McSweeny, James D.; Ralph, Sally A.
Source: Journal of wood chemistry and technology. Vol. 31, no. 4 (2011): p. 324-344.
Description: Raman spectroscopy is being increasingly applied to study wood and other lignin-containing biomass/biomaterials. Lignin’s contribution to the Raman spectra of such materials needs to be understood in the context of various lignin structures, substructures, and functional groups so that lignin-specific features could be identified and the spectral information could be interpreted usefully. Additionally, to enhance the utility of Raman as a characterization tool, an understanding of chemical-treatment-induced changes to the lignin spectrum is important. In the present work, Raman spectra of four milled-wood lignins (MWLs)—black spruce, loblolly pine, aspen, and sweetgum—were compared, and using black spruce MWL, spectral changes brought about by alkaline hydrogen peroxide bleaching, hydrogenation, acetylation, and methylation reactions were analyzed. The band intensity changes depended upon the nature of the chemical treatments.
Keywords: Raman spectroscopy, wood chemistry, Fourier-transform spectroscopy, lignin analysis, bleaching, spectrum analysis, pulping, lignocellulose, black spruce, hydrogen peroxide, hydrogenation, acetylation, methylation, chemical reactions, loblolly pine, aspen, softwoods, hardwoods, Picea mariana, Pinus taeda, Populus, chemical composition, spectroscopy, liquidambar, sweetgum, diazomethane, lignin, pulping, FT-Raman spectroscopy, milled-wood lignin, diimide-after borohydride, acetic anhydride
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Agarwal, Umesh P.; McSweeny, James D.; Ralph, Sally A. 2011. FT-Raman investigation of milled-wood lignins : softwood, hardwood, and chemically modified black spruce lignins. Journal of wood chemistry and technology. Vol. 31, no. 4 (2011): p. 324-344..