EFFECT OF HIGH-TEMPERATURE FIBERIZATION ON THE CHEMICAL STRUCTURE OF SOFTWOOD
- 31 August 2001
- journal article
- Published by Informa UK Limited in Journal of Wood Chemistry and Technology
- Vol. 21 (3), 227-245
- https://doi.org/10.1081/wct-100105374
Abstract
Softwoods fiberized at high temperatures (above 170°C) were subjected to bulk and surface chemical analyses. It was found that the frequency of lignin β-O-4 linkages declined while that of phenolic hydroxyl groups increased with an increase in fiberization temperature. The amount of water extractable aromatic compounds increased with increasing temperature of fiberization, which was associated with cleavage of lignin ether linkages. The water extractable material generated was enriched in hemicelluloses and contained aromatic compounds rich in phenolic hydroxyl groups and low in β-O-4 linkages. The amount and hemicellulose content of the water extracts increased with increasing fiberization temperature. Lipophilic extractives covered most of the fiber surfaces while the surface lignin content of extractives-free fibers roughly doubled their bulk lignin content.Keywords
This publication has 11 references indexed in Scilit:
- Surface Composition and Morphology of CTMP FibersHolzforschung, 1999
- Enzymatic activation of wood fibres as a means for the production of wood compositesJournal of Adhesion Science and Technology, 1997
- Structural changes of cellulose, wood, and paper under shear deformation and high pressureJournal of Applied Polymer Science, 1994
- Polysaccharides Dissolved from Norway Spruce in Thermomechanical Pulping and Peroxide BleachingJournal of Wood Chemistry and Technology, 1994
- The Determination of LigninPublished by Springer Science and Business Media LLC ,1992
- Determination of Phenolic Hydroxyl GroupsPublished by Springer Science and Business Media LLC ,1992
- Cross Polarization/Magic Angle Spinning Nuclear Magnetic Resonance (CP/MAS NMR) SpectroscopyPublished by Springer Science and Business Media LLC ,1992
- Wettability of kraft pulps-effect of surface composition and oxygen plasma treatmentJournal of Adhesion Science and Technology, 1992
- Mechanochemistry of Lignin. IV. Mechanochemical Reactions of Phenylcoumaran ModelsHolzforschung, 1990
- Mechanochemistry of Lignin III. Mechanochemical Reactions of β—O—4 Lignin Model CompoundsHolzforschung, 1990