Characterization of aspen exploded wood lignin
Canadian Journal of Chemistry1982Vol. 60(18), pp. 2372–2382
Citations Over TimeTop 10% of 1982 papers
Abstract
Exploded wood lignin (EXWL) was extracted from moist steam hydrolysed aspen (Populustremuloides) wood using methanol. The lignin was examined by elemental analysis, gel permeation chromatography, infrared spectroscopy, proton and 13 C nmr. The observed nmr spectra were compared with those of aspen milled wood lignin (MWL). Typical composition of the material is C 9 H 9.2 O 2.7 (OCH 3 ) 1.1 Assignment of all the signals in the nmr spectrum led to the conclusion that the explosion process causes cleavage of the β-aryl-ether bond. The weight average molecular weight was found to be 1700–1900 and the polydispersity 2.6. The finely divided exploded wood was soluble in 90% methanol/water mixtures to well beyond 20% by weight at room temperature.
Related Papers
- → Reaction behavior of lignin in supercritical methanol as studied with lignin model compounds(2003)72 cited
- → Monodisperse lignin fractions as standards in size-exclusion analysis(2009)21 cited
- → Delignification mechanism during high-boiling solvent pulping. Part 6: Changes in lignin structure analyzed by 1H-13C correlation 2-D NMR spectroscopy(2004)30 cited
- → Study of Structure of Industrial Acid Hydrolysis Lignin, Oxidized in the H2O2-H2SO4System(2016)22 cited
- → The Characteristics and Reactivity of Acid-Labile Aryl Ether Units in Wood Lignin(2014)