Relationship between dissolution of fiber materials and development of pulp strength in alkaline peroxide bleaching of mechanical pulp
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G.X. Pan
Abstract
This study elucidates the relationship between the dissolution of pulp components and the development of fiber bonding properties in alkaline peroxide bleaching of aspen mechanical pulp. In general, bleaching reactions cause the removal of pulp substances from the fibers, which in turn improves pulp strength properties. Nonetheless, alkaline hydrolysis is particularly important to the development of strength because this reaction mechanism plays a key role in imparting additional carboxylic acid groups onto the fibers. The strong correlation between fiber carboxylic acid group concentration and the amount of anionic dissolved substances makes it possible for us to predict the strength properties of bleached pulps by estimating the anionicity of bleaching filtrates using analytical methods such as cationic demand. The paper also provides insights into the importance of the alkalinity in peroxide bleaching to the dissolution of pulp materials and the strength development.
Copyright © 2004 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Bioactive phenolic substances in industrially important tree species. Part 1: Knots and stemwood of different spruce species
- Oligolignans in Norway spruce and Scots pine knots and Norway spruce stemwood
- Delignification mechanism during high-boiling solvent pulping. Part 6: Changes in lignin structure analyzed by 1H-13C correlation 2-D NMR spectroscopy
- Ozonation of conventional kraft and SuperBatch residual lignins in methanol/water and water
- Relationship between dissolution of fiber materials and development of pulp strength in alkaline peroxide bleaching of mechanical pulp
- Nondestructive estimation of tracheid length from sections of radial wood strips by near infrared spectroscopy
- Heat transfer model for estimating pinene emissions from hot-pressing softwood flakeboard
- Monitoring creep-rupture in oriented strandboard using acoustic emission: Effects of moisture content
- Adhesives made from isocyanates and pyrolysis oils for wood composites
- Effect of wood acidity and catalyst on UF resin gel time
- Estimation of green moisture content distribution in hemfir timber by stochastic simulation
- Theoretical exploration of factors affecting dielectric constants of masson pine
- Shrinkage stress of wood during drying under superheated steam above 100°C
- Exploratory evaluation of oscillation drying for thick hemlock timbers
- A biopulping mechanism: Creation of acid groups on fiber
- Enzymatically polymerized phenolic compounds as wood preservatives
- Evaluation of borate formulations as wood preservatives to control subterranean termites in Australia
