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Abbravation: Journal of Wood Science

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SpringerOpen

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10.1016/0305-0491(74)90104-7

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1611-4663

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Analysis on residue formation during wood liquefac

Authors: Masahiko Kobayashi Toshiyuki Asano Mikio Kajiyama Bunichiro Tomita
Publish Date: 2004/10
Volume: 50, Issue: 5, Pages: 407-
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Abstract

Liquefactions of cellulose powder steamed lignin alkali lignin and their mixtures were carried out to analyze the reaction process of wood using polyhydric alcohol The liquefaction of wood proceeded immediately and wood components were converted to NNdimethylformamide DMFsoluble components After that the condensation reaction occurred with increasing reaction time However none of cellulose powder steamed lignin and alkali lignin condensed by themselves during their liquefaction The mixture of cellulose and lignin was also liquefied and condensed after a long reaction time The results of analysis showed that the behavior of the mixture resembled that of wood with respect to molecular weight distribution and the main functional groups Lignin was converted to DMFsoluble compounds in the initial stage of wood liquefaction followed by cellulose gradually being converted into soluble compounds After that condensation reactions took place among some parts of depolymerized and degraded compounds from cellulose and lignin and were converted into DMFinsoluble compounds It was concluded that the ratedetermining step of wood liquefaction was the depolymerization of cellulose Furthermore it was suggested that the condensation reaction was due to the mutual reaction among depolymerized cellulose and degraded aromatic derivatives from lignin or due to the nucleophilic displacement reaction of cellulose by phenoxide ion


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  1. Bending creep behavior of wood under cyclic moisture changes
  2. Effects of urea treatment on litter decomposition in Pasania edulis forest soil
  3. Effects of five additive materials on mechanical and dimensional properties of wood cement-bonded boards
  4. Bearing properties of engineered wood products I: effects of dowel diameter and loading direction
  5. Screening method for wood extractives: direct cellulose thin-layer chromatography plate
  6. Load-carrying capacity of steel-to-timber joints with a pretensioned bolt
  7. Cultivation of Pleurotus eryngii on umbrella plant ( Cyperus alternifolius ) substrate
  8. Enhancement of saccharification by overexpression of poplar cellulase in sengon
  9. Film formation and some structural features of hemicellulose fractions from Pinus densiflora leaves
  10. Effect of element type on the internal bond quality of wood-based panels determined by three methods
  11. Comparative study of organic solvent-soluble and water-soluble lipophilic extractives from wheat straw 2: spectroscopic and thermal analysis
  12. Contribution of lignin to the reactivity of wood in chemical modifications II: influence of delignification on reaction with vaporous formaldehyde
  13. Water removal of wet veneer by roller pressing
  14. Wavelength dependence of machining performance in UV-, VIS- and NIR-laser cutting of wood
  15. Essential oil from the leaves of Cryptomeria japonica acts as a silverfish ( Lepisma saccharina ) repellent and insecticide
  16. Chemical composition, antioxidant and antibacterial activities of extracts from Schinus molle wood branch growing in Egypt
  17. Quantification of knots in dimension lumber using a single-pass X-ray radiation
  18. Development of an air-injection press for preventing blowout of particleboard IV: effects of air-injection conditions on board performance and formaldehyde emission
  19. Vapor phase reaction of wood with maleic anhydride (I): dimensional stability and durability of treated wood
  20. Applied data for modeling the behavior in cyclic torsion of beams in glued-laminated wood: influence of amplitude
  21. Potassium distribution in black heartwood of sugi ( Cryptomeria japonica ) I: Localization in axial parenchyma cells
  22. Upgrading of urea formaldehyde-bonded reed and wheat straw particleboards using silane coupling agents
  23. Resistance of gamma-irradiated sapwood of Cryptomeria japonica to biological attacks
  24. The smell and odorous components of dried shiitake mushroom, Lentinula edodes I: relationship between sensory evaluations and amounts of odorous components
  25. Mechanism of mercerization revealed by X-ray diffraction
  26. Cesium adsorption from aqueous solutions onto Japanese oak charcoal III: effects of water-extraction treatment
  27. Radial variations of wood properties in Casuarina equisetifolia growing in Bangladesh
  28. Improvement of fire retardancy of plywood by incorporating boron or phosphate compounds in the glue
  29. Extractives relating to heartwood color changes in sugi ( Cryptomeria japonica ) by a combination of smoke-heating and UV radiation exposure
  30. Stress wave velocity, basic density, and compressive strength in 34-year-old Pinus merkusii planted in Indonesia
  31. Use of hemicellulase in sequence with hydrogen peroxide and laccase for improvement of teak veneer surface color
  32. Antioxidant compounds from Eucalyptus grandis biomass by subcritical liquid water extraction
  33. Shiitake ( Lentinula edodes ) cultivation in sawdust media consisting of kunugi ( Quercus acutissima ) mixed with sugi ( Cryptomeria japonica ): optimization of gaseous phase rate in media by three-phase-structure analysis
  34. Radial variations of vibrational properties of three tropical woods

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