CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

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

J. Rencoret ; J. C. del Rio ; A. Gutierrez ; A. T. Martinez ; Shiming Li (Institutionen för kemi- och bioteknik, Fysikalisk kemi) ; Jim Parkås ; Knut Lundquist (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
Wood Science and Technology (0043-7719). Vol. 46 (2012), 1-3, p. 459-471.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: nuclear-magnetic-resonance, dfrc method, nmr-spectroscopy, sinapyl, acetate, ether type, 2d nmr, kenaf, cleavage, monomers, plants



Denna post skapades 2012-02-07.
CPL Pubid: 154863

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Fysikalisk kemi (2005-2014)
Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)

Ämnesområden

Pappers-, massa- och fiberteknik

Chalmers infrastruktur