Surface Fractal Dimensionality and Hygroscopicity for Heated Wood
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T. Nakano
Summary
The relationship between hygroscopicity and the microsurface of heated wood was examined using the fractal surface dimensionality. The hygroscopicity of heated wood decreased with the increase in heating temperature to 250°C, and then decreased again above 350°C after increasing up to 350°C. This change corresponded to chemical changes in the wood, especially a reduction in hydroxyl groups, up to 250°C, and to the temperature dependence of the fractal dimensionality calculated from nitrogen gas adsorption above 250°C. The fractal dimensionality increased gradually from 100 to 250°C, followed by a rapid increase above 250°C with a peak at 350°C, and leveled off above 400°C. From the results, it is concluded that hygroscopicity of heated wood changes at 250°C and that it is dependent upon the chemical properties of wood below 250°C and upon the surface complexity above 250°C.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- Editorial
- Post-Harvest Chemical Staining in Blackwood (Acacia melanoxylon R. Br.)
- Albino Strains of Ophiostoma Species for Biological Control of Sapstaining Fungi
- Presence of a Distinct S3 Layer in Mild Compression Wood Tracheids of Pinus radiata
- A Method to Estimate Fibre Length Distribution in Conifers Based on Wood Samples from Increment Cores
- Inhomogeneities in the Chemical Structure of Hardwood Lignins
- Molecular Modeling of Lignin β-O-4 Model Compounds. Comparative Study of the Computed and Experimental Conformational Properties for a Guaiacyl β-O-4 Dimer
- Kraft Green Liquor Pretreatment of Softwood Chips. Part III: Lignin Chemical Modifications
- The Role of Ferulic Acid Removal during Bleaching of Wheat Straw Mechanical Pulp with Peroxygen Reagents
- Surface Fractal Dimensionality and Hygroscopicity for Heated Wood
- Evaluation of the Microclimate in a Stored Softwood Chip Pile for Biopulping
- Wettability of Heat-Treated Wood
- The Relationship between Longitudinal Growth Strain, Tree Form and Tension Wood at the Stem Periphery of Ten- to Eleven-Year-Old Eucalyptus globulus Labill.
- Effects of Thermal Conductivity Data on Accuracy of Modeling Heat Transfer in Wood
- Detection of the Fracture Path under Tensile Loads through in situ Tests in an ESEM Chamber
- Properties of Southern Pine Wood Impregnated with Styrene
- Takayoshi Higuchi 75 Years Old
- Literature Reports
Articles in the same Issue
- Editorial
- Post-Harvest Chemical Staining in Blackwood (Acacia melanoxylon R. Br.)
- Albino Strains of Ophiostoma Species for Biological Control of Sapstaining Fungi
- Presence of a Distinct S3 Layer in Mild Compression Wood Tracheids of Pinus radiata
- A Method to Estimate Fibre Length Distribution in Conifers Based on Wood Samples from Increment Cores
- Inhomogeneities in the Chemical Structure of Hardwood Lignins
- Molecular Modeling of Lignin β-O-4 Model Compounds. Comparative Study of the Computed and Experimental Conformational Properties for a Guaiacyl β-O-4 Dimer
- Kraft Green Liquor Pretreatment of Softwood Chips. Part III: Lignin Chemical Modifications
- The Role of Ferulic Acid Removal during Bleaching of Wheat Straw Mechanical Pulp with Peroxygen Reagents
- Surface Fractal Dimensionality and Hygroscopicity for Heated Wood
- Evaluation of the Microclimate in a Stored Softwood Chip Pile for Biopulping
- Wettability of Heat-Treated Wood
- The Relationship between Longitudinal Growth Strain, Tree Form and Tension Wood at the Stem Periphery of Ten- to Eleven-Year-Old Eucalyptus globulus Labill.
- Effects of Thermal Conductivity Data on Accuracy of Modeling Heat Transfer in Wood
- Detection of the Fracture Path under Tensile Loads through in situ Tests in an ESEM Chamber
- Properties of Southern Pine Wood Impregnated with Styrene
- Takayoshi Higuchi 75 Years Old
- Literature Reports
