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Title: FT-Raman Investigation of Milled-Wood Lignins: Softwood, Hardwood, and Chemically Modified Black Spruce Lignins

Source: Journal of Wood Chemistry and Technology, 31:324-344, 2011

Author(s)Agarwal, Umesh P.; McSweeny, James D.; Ralph, Sally A.

Publication Year: 2011  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-2A  FPL-4709-3A

Abstract: 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

Publication Review Process: Formally Refereed

File size: 407 kb(s)

Date posted: 07/12/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 38961
Current FPL Scientist associated with this product
Agarwal, Umesh P.
Research Chemist

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