Article
Licensed
Unlicensed
Requires Authentication
Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp
-
T. Bikova
Published/Copyright:
June 1, 2005
Summary
An approach to a chromophore composition study using the direct size-exclusion chromatography (SEC-UV) analysis of an alkaline extract of pulp fibre walls is described. Absorbance in the 290–405 nm range of 2% and 18% NaOH extract from unbleached pulps obtained by conventional and extended kraft delignification of black alder wood is compared. The effect of cooking conditions on the localisation and accessibility of chromophores is elucidated. The alkali-soluble lignin from pulp produced by extended cooking was less oxidised, less conjugated, and less coloured as compared with the conventional kraft lignin. A chromophore accessibility index is proposed. The chromogenic structures in pulps obtained by extended cooking were more resistant to alkali solutions than those in conventional kraft pulps.
:
Published Online: 2005-06-01
Published in Print: 2001-09-19
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- The Influence of Rays on the Transverse Elastic Anisotropy in Green Wood of Deciduous Trees
- The Effect of Varying Latewood Proportion on the Radial Distribution of Lignin Content in a Pine Stem
- Effects of Environmental Factors on the Color of Sugi (Cryptomeria japonica D. Don) Yellowish Heartwood
- Influence of Tannin-Copper Complexes as Preservatives for Wood on Mechanism of Decomposition by Brown-Rot Fungus Fomitopsis palustris
- Characteristics of Sludges Produced by Destabilization of CCA Preservative Solutions
- Extractives and Structural Components in Wood and Bark of Endemic Oak Quercus vulcanica Boiss
- Fragmentation of Suberin and Composition of Aliphatic Monomers Released by Methanolysis of Cork from Quercus suber L.,Analysed by GC-MS, SEC and MALDI-MS
- Controlled Assembly of Glucuronoxylans onto Cellulose Fibres
- Solid State NMR Studies on Inhomogeneous Structure of Fibre Wall in Kraft Pulp
- Characterizing the Surface Roughness of Thermomechanical Pulp Fibers with Atomic Force Microscopy
- Thermal Decomposition of Cellulose Crystallites in Wood
- Damage and Fracture Mechanisms during Mode I and III Loading of Wood
- Directional Characteristics of Near Infrared Light Reflected from Wood
- An Investigation of Selected Factors that Influence Hardwood Wettability
- Intra-Ring Variations in the Rolling Shear Modulus of Spruce Wood
- Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp
- Addition of Boron Based Compound in the LVL Glueline: Effect on the Mechanical Properties and the Leaching of Boron
Articles in the same Issue
- The Influence of Rays on the Transverse Elastic Anisotropy in Green Wood of Deciduous Trees
- The Effect of Varying Latewood Proportion on the Radial Distribution of Lignin Content in a Pine Stem
- Effects of Environmental Factors on the Color of Sugi (Cryptomeria japonica D. Don) Yellowish Heartwood
- Influence of Tannin-Copper Complexes as Preservatives for Wood on Mechanism of Decomposition by Brown-Rot Fungus Fomitopsis palustris
- Characteristics of Sludges Produced by Destabilization of CCA Preservative Solutions
- Extractives and Structural Components in Wood and Bark of Endemic Oak Quercus vulcanica Boiss
- Fragmentation of Suberin and Composition of Aliphatic Monomers Released by Methanolysis of Cork from Quercus suber L.,Analysed by GC-MS, SEC and MALDI-MS
- Controlled Assembly of Glucuronoxylans onto Cellulose Fibres
- Solid State NMR Studies on Inhomogeneous Structure of Fibre Wall in Kraft Pulp
- Characterizing the Surface Roughness of Thermomechanical Pulp Fibers with Atomic Force Microscopy
- Thermal Decomposition of Cellulose Crystallites in Wood
- Damage and Fracture Mechanisms during Mode I and III Loading of Wood
- Directional Characteristics of Near Infrared Light Reflected from Wood
- An Investigation of Selected Factors that Influence Hardwood Wettability
- Intra-Ring Variations in the Rolling Shear Modulus of Spruce Wood
- Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp
- Addition of Boron Based Compound in the LVL Glueline: Effect on the Mechanical Properties and the Leaching of Boron
