Journal
POLYMER DEGRADATION AND STABILITY
Volume 95, Issue 6, Pages 997-1003Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2010.03.012
Keywords
Miscanthus x giganteus; Lignin; Organosolv pre-treatment; NMR spectroscopy; FTIR spectroscopy; SEC
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Funding
- CPER
- European (FEDER)
- DRRT
- FNADT
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Ethanol organosolv lignin extracted from Miscanthus x giganteus with differing levels of severity (1.75 < CS<2.8) were subjected to comprehensive structural characterization by C-13, P-31 NMR, FTIR spectroscopy and gel permeation chromatography. The results were compared to those from milled wood lignin from the same feedstock. The results showed that an increase in the severity of the treatment enhanced the dehydration reactions on the side chain and the condensation of lignin, increased the concentration of phenol groups and decreased the molecular mass of lignin fragments. It appeared that for the experimental conditions generally employed the cleavage of a-aryl ether bonds is primarily reaction responsible for lignin depolymerization under the organosolv conditions examined. (C) 2010 Elsevier Ltd. All rights reserved.
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