The reduction in the fibre saturation point of wood due to chemical modification using anhydride reagents: A reappraisal
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Callum A.S. Hill
Abstract
The data from a previous study of the moisture adsorption of Corsican pine modified with linear chain carboxylic acid anhydrides (acetic, propionic, butyric, valeric, hexanoic) has been reanalysed so that moisture content is reported as a percentage of cell wall mass only. As part of this work, the change in fibre saturation point (FSP, determined from fits of the Hailwood-Horrobin model) of the modified wood has been determined as a function of weight percentage gain (WPG). The change in FSP is not determined by the extent of hydroxyl substitution of the cell wall, but is related to WPG only (as reported previously). This is also true for the relationship between monolayer water, polylayer water, molecular weight per sorption site at saturation and WPG. However, there is no simple linear relationship between calculated FSP and WPG. When the FSP was determined by solute exclusion methods, the reduction thereof could be simply explained as due to bulking of the cell wall by the bonded acyl substituents. This is not the case when the FSP is determined from adsorption isotherms. This result is interpreted as an ambiguity of determination of FSP from projections of sorption isotherms. Differences in FSP determined by the two methods (sorption versus solute exclusion) are considered to be due to incomplete wetting of the lignocellulosic material when absorbing moisture from the initial dry state.
©2008 by Walter de Gruyter Berlin New York
Artikel in diesem Heft
- Original Papers
- Alkaline-sulfite chemithermomechanical pulping of Eucalyptus grandis biotreated by Ceriporiopsis subvermispora under varied culture conditions
- First characterization of the development of bleached kraft softwood pulp fiber interfaces during drying and rewetting using FRET microscopy
- The fate of phosphorus in the bleaching of spruce TMP with the new bleaching agent – THPS
- Dynamics of the effective capillary cross-sectional area during the alkaline impregnation of eucalyptus wood
- Wood solubilization and depolymerization using supercritical methanol. Part 1: Process optimization and analysis of methanol insoluble components (bio-char)
- Wood solubilization and depolymerization by supercritical methanol. Part 2: Analysis of methanol soluble compounds
- Composition of callus resin of Norway spruce, Scots pine, European larch and Douglas fir
- The reduction in the fibre saturation point of wood due to chemical modification using anhydride reagents: A reappraisal
- Water absorption thermodynamics in single wood pellets modelled by multivariate near-infrared spectroscopy
- A survey of moisture distribution in two sets of Scots pine logs by NIR-spectroscopy
- Identification of selected log characteristics from computed tomography images of sugar maple logs using maximum likelihood classifier and textural analysis
- Compressive stress-strain properties of natural materials treated with aqueous NaOH
- Profile production in multi-veneer sheets by continuous roll forming
- Evaluation on structural performance of compressed wood as shear dowel
- Wood-adhesive interactions in a PVAc latex
- A comprehensive analysis of the relation of cellulose microfibril orientation and lignin content in the S2 layer of different tissue types of spruce wood (Picea abies (L.) Karst.)
- Micromorphological characteristics and lignin distribution in bamboo (Phyllostachys pubescens) degraded by the white rot fungus Lentinus edodes
- Synthesis of ethylene maleic anhydride copolymer containing fungicides and evaluation of their effect for wood decay resistance
- Short Notes
- Plasma treatment of heat treated beech wood – investigation on surface free energy
- Meetings
Artikel in diesem Heft
- Original Papers
- Alkaline-sulfite chemithermomechanical pulping of Eucalyptus grandis biotreated by Ceriporiopsis subvermispora under varied culture conditions
- First characterization of the development of bleached kraft softwood pulp fiber interfaces during drying and rewetting using FRET microscopy
- The fate of phosphorus in the bleaching of spruce TMP with the new bleaching agent – THPS
- Dynamics of the effective capillary cross-sectional area during the alkaline impregnation of eucalyptus wood
- Wood solubilization and depolymerization using supercritical methanol. Part 1: Process optimization and analysis of methanol insoluble components (bio-char)
- Wood solubilization and depolymerization by supercritical methanol. Part 2: Analysis of methanol soluble compounds
- Composition of callus resin of Norway spruce, Scots pine, European larch and Douglas fir
- The reduction in the fibre saturation point of wood due to chemical modification using anhydride reagents: A reappraisal
- Water absorption thermodynamics in single wood pellets modelled by multivariate near-infrared spectroscopy
- A survey of moisture distribution in two sets of Scots pine logs by NIR-spectroscopy
- Identification of selected log characteristics from computed tomography images of sugar maple logs using maximum likelihood classifier and textural analysis
- Compressive stress-strain properties of natural materials treated with aqueous NaOH
- Profile production in multi-veneer sheets by continuous roll forming
- Evaluation on structural performance of compressed wood as shear dowel
- Wood-adhesive interactions in a PVAc latex
- A comprehensive analysis of the relation of cellulose microfibril orientation and lignin content in the S2 layer of different tissue types of spruce wood (Picea abies (L.) Karst.)
- Micromorphological characteristics and lignin distribution in bamboo (Phyllostachys pubescens) degraded by the white rot fungus Lentinus edodes
- Synthesis of ethylene maleic anhydride copolymer containing fungicides and evaluation of their effect for wood decay resistance
- Short Notes
- Plasma treatment of heat treated beech wood – investigation on surface free energy
- Meetings
