Syntheses and properties of liquefied products of ozone treated wood/epoxy resins having high wood contents
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Toshiyuki Asano
Abstract
Liquefied products with high wood content were prepared by pretreating wood with ozone before liquefaction. As a result, the ratio of wood to polyhydric alcohol (W/P ratio) used as solvent could be increased to 2:1. Resin blends were prepared by mixing liquefied products with ethylene glycol diglycidyl ether (EGDGE, water-soluble) and diglycidyl ether of bisphenol A (DGEBA, oily consistency). The wood content of the resin blend could be increased to 53%. The resins were cured by citric acid or triethylene tetramine (TETA), and their mechanical properties were evaluated. Dynamic mechanical measurements revealed that the former had higher glass transition temperatures than the latter. It was found that the resin with DGEBA cured by citric acid had almost the same level of tensile strength as commercial plastics.
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©2007 by Walter de Gruyter Berlin New York
Articles in the same Issue
- MWL fraction with a high concentration of lignin-carbohydrate linkages: Isolation and 2D NMR spectroscopic analysis
- Papermaking properties of the ECF-bleached kraft pulps from first-thinning Scots pine (Pinus sylvestris L.)
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- Properties of piezoelectric voltage considering the microscopic structure of wood cell walls
- Adjusting for fibre length-biased sampling probability using increment cores from standing trees
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- Award Presentation on the occasion of the European Workshop on Lignocellulosics and Pulp (EWLP 2006) in Vienna
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Articles in the same Issue
- MWL fraction with a high concentration of lignin-carbohydrate linkages: Isolation and 2D NMR spectroscopic analysis
- Papermaking properties of the ECF-bleached kraft pulps from first-thinning Scots pine (Pinus sylvestris L.)
- Syntheses and properties of liquefied products of ozone treated wood/epoxy resins having high wood contents
- Quality control of thermally modified timber: Interrelationship between heat treatment intensities and CIE L*a*b* color data on homogenized wood samples
- Violet light causes photodegradation of wood beyond the zone affected by ultraviolet radiation
- Dynamic mechanical analysis of dry wood: Linear viscoelastic response region and effects of minor moisture changes
- Material properties and their interrelation in chemically modified clear wood of Scots pine
- Effect of treatments with 1,3-dimethylol-4,5-dihydroxy-ethyleneurea (DMDHEU) on the tensile properties of wood
- Penetration of amino-silicone micro- and macro-emulsions into Scots pine sapwood and the effect on water-related properties
- Search for a relationship between stress wave velocity and internal stresses in eucalypts and radiata pine
- Kiln-drying lumber quality of hybrid poplar clones
- Heat and mass transfer in wood composite panels during hot pressing: Part 3. Predicted variations and interactions of the pressing variables
- Heat and mass transfer in wood composite panels during hot pressing: Part 4. Experimental investigation and model validation
- Dielectric relaxation of water adsorbed on wood and charcoal
- Properties of piezoelectric voltage considering the microscopic structure of wood cell walls
- Adjusting for fibre length-biased sampling probability using increment cores from standing trees
- External and internal fungal flora of pine sapwood (Pinus sylvestris L.) specimens in above-ground field tests at six different sites in south-west Germany
- Award Presentation on the occasion of the European Workshop on Lignocellulosics and Pulp (EWLP 2006) in Vienna
- Phenolic compounds in silver birch (Betula pendula Roth) wood
