Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin
Journal article, 2012
The occurrence and nature of acetate groups in the milled wood lignin (MWL) isolated from birch (Betula pendula Roth) has been addressed by spectroscopic (2D-NMR) and chemical degradative (derivatization followed by reductive cleavage, DFRC) methods. Considerable amounts of acetate groups were present in the MWL preparation. However, 2D-NMR analysis indicated that the lignin polymer is not extensively acetylated and that the major part of the acetate groups is attached to the xylan moieties present in the MWL preparation. Nevertheless, evidence of the presence of minor acetylation of the gamma-carbon of the lignin side chain (< 3% of both syringyl and guaiacyl lignin units) was provided by DFRC analysis.
cleavage
ether type
monomers
plants
nuclear-magnetic-resonance
acetate
2d nmr
kenaf
nmr-spectroscopy
sinapyl
dfrc method
Author
J. Rencoret
Spanish National Research Council (CSIC)
J. C. del Rio
Spanish National Research Council (CSIC)
A. Gutierrez
Spanish National Research Council (CSIC)
A. T. Martinez
Spanish National Research Council (CSIC)
Shiming Li
Chalmers, Chemical and Biological Engineering, Physical Chemistry
Jim Parkås
Knut Lundquist
Chalmers, Chemical and Biological Engineering, Forest Products and Chemical Engineering
Wood Science and Technology
0043-7719 (ISSN) 1432-5225 (eISSN)
Vol. 46 1-3 459-471Subject Categories (SSIF 2011)
Paper, Pulp and Fiber Technology
DOI
10.1007/s00226-011-0417-z