Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin

• 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 (

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

Keyword

cleavage

kenaf

sinapyl

2d nmr

acetate

plants

nmr-spectroscopy

ether type

dfrc method

monomers

nuclear-magnetic-resonance

Publication and Content Type

art (subject category)

ref (subject category)