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Within-process and seasonal changes during industrial production of high-density fibreboard. Part 1: Influence of wood species composition on polyoses in the products
-
Martin Weigl
,
Rupert Wimmer
Published/Copyright:
April 18, 2012
Abstract
Industrially produced high-density fibreboard fibres are inhomogeneous in structure and chemical composition. Changes in polysaccharide chemistry during processing have an impact on strength loss, fibre separation and structural alterations. In the present study, carbohydrate composition of extracted wood chips and refiner fibres was monitored for a year at an industrial HDF plant. The polysaccharides were analysed via methanolysis and quantification of the monomeric sugars released. Significant reductions of arabinose, xylose, rhamnose and galacturonic acid were observed. The amount of glucose and extractable substances increased. The depletion of galacturonic acid and rhamnose indicates a degradation of pectin located in the compound middle lamella. The diminishing amounts of the other sugars and elevated extractive contents are a result of hemicellulose degradation. A pronounced seasonal variability of the data was observed depending on the processed wood species and degree of chemical degradation.
Keywords: analysis of polyoses; cellulose; chip; degradation; extractives; fibre; HDF; hemicellulose; industrial; methanolysis; sugar analysis
Received: 2012-2-27
Accepted: 2012-3-5
Published Online: 2012-04-18
Published in Print: 2012-07-01
©2012 by Walter de Gruyter Berlin Boston
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Keywords for this article
analysis of polyoses;
cellulose;
chip;
degradation;
extractives;
fibre;
HDF;
hemicellulose;
industrial;
methanolysis;
sugar analysis
Articles in the same Issue
- Original Papers
- Identification of new lignans in Norway spruce knotwood extracts
- Isolation and characterization of β-cadinene synthase cDNA from Chamaecyparis formosensis Matsum
- Antioxidant activity of fractions from Quercus sideroxyla bark and identification of proanthocyanidins by HPLC-DAD and HPLC-MS
- New diarylpropanoids from Lindera glauca Bl. heartwood
- Extracting value-added products before pulping: Hemicellulosic ethanol from Eucalyptus globulus wood
- Effect of various pulp properties on the solubility of cellulose in sodium hydroxide solutions
- Dissolution and acetylation of ball-milled birch (Betula platyphylla) and bamboo (Phyllostachys nigra) in the ionic liquid [Bmim]Cl for HSQC NMR analysis
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