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Wood capillarity and deacetylation during eucalyptus alkaline impregnation. Sulphidity effects and comparison between transverse directions
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María Cristina Inalbon
Veröffentlicht/Copyright:
28. August 2012
Abstract
The relative ion transport capacity of wood – the “effective capillary cross sectional area" (ECCSA) – is determined in this work, based on the analogy with the relation between the electrical conductivities of wood and liquid medium. Wood was treated under different conditions and then the corresponding ECCSAA (the index A is for alkali) is estimated from the value obtained in an inert solution at room temperature (ECCSAInert). The difference between radial and tangential ECCSAA values is constant irrespective of pH, time, temperature and the presence of sodium sulfide in the treatment liquor. The results show that ECCSAA is dependent on the degree of removal of native acetyl groups from hardwood O-acetyl-glucuronoxylan. A kinetic expression for Eucalyptus wood deacetylation is validated and used to establish the relationship between the acetyl content and ECCSAA in both anatomical directions.
Received: 2012-2-24
Accepted: 2012-7-30
Published Online: 2012-08-28
Published in Print: 2013-01-01
©2013 by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Masthead
- Masthead
- Original Papers
- Assessment of total phenols and extractives of mahogany wood by near infrared spectroscopy (NIRS)
- Steam pretreatment for enzymatic hydrolysis of poplar wood: comparison of optimal conditions with and without SO2 impregnation
- Silica content of 36 Brazilian tropical wood species
- Dissolution and acetylation of ball-milled lignocellulosic biomass in ionic liquids at room temperature: application to nuclear magnetic resonance analysis of cell-wall components
- Effects of hydrothermal processing on the cellulosic fraction of Eucalyptus globulus wood
- Wood capillarity and deacetylation during eucalyptus alkaline impregnation. Sulphidity effects and comparison between transverse directions
- Effects of climatic test parameters on acetic acid emission from beech (Fagus sylvatica L.)
- Rational production of veneer by IR-heating of green wood during peeling: Modeling experiments
- Measurement of intra-ring wood density by means of imaging VIS/NIR spectroscopy (hyperspectral imaging)
- Coarse graining of wood cell arrangement and density dependence of elasticity
- Changes in viscoelastic vibrational properties between compression and normal wood: roles of microfibril angle and of lignin
- Elastic properties of cellular wood panels with hexagonal and auxetic cores
- Alternative experimental method to evaluate moment-carrying capacity of traditional wood-to-wood joint with small scale experiment
- Detection of iron-chelating and iron-reducing compounds in four brown rot fungi
- Synthesis and fungicidal activity of dehydroabietyl-1,2,4-triazolo-thiazolidinones
- Meetings
- Meetings
Schlagwörter für diesen Artikel
alkaline pre-extraction;
deacetylation kinetics;
diffusion;
effective capillarity
Artikel in diesem Heft
- Masthead
- Masthead
- Original Papers
- Assessment of total phenols and extractives of mahogany wood by near infrared spectroscopy (NIRS)
- Steam pretreatment for enzymatic hydrolysis of poplar wood: comparison of optimal conditions with and without SO2 impregnation
- Silica content of 36 Brazilian tropical wood species
- Dissolution and acetylation of ball-milled lignocellulosic biomass in ionic liquids at room temperature: application to nuclear magnetic resonance analysis of cell-wall components
- Effects of hydrothermal processing on the cellulosic fraction of Eucalyptus globulus wood
- Wood capillarity and deacetylation during eucalyptus alkaline impregnation. Sulphidity effects and comparison between transverse directions
- Effects of climatic test parameters on acetic acid emission from beech (Fagus sylvatica L.)
- Rational production of veneer by IR-heating of green wood during peeling: Modeling experiments
- Measurement of intra-ring wood density by means of imaging VIS/NIR spectroscopy (hyperspectral imaging)
- Coarse graining of wood cell arrangement and density dependence of elasticity
- Changes in viscoelastic vibrational properties between compression and normal wood: roles of microfibril angle and of lignin
- Elastic properties of cellular wood panels with hexagonal and auxetic cores
- Alternative experimental method to evaluate moment-carrying capacity of traditional wood-to-wood joint with small scale experiment
- Detection of iron-chelating and iron-reducing compounds in four brown rot fungi
- Synthesis and fungicidal activity of dehydroabietyl-1,2,4-triazolo-thiazolidinones
- Meetings
- Meetings
