Abstract
The preparation of self-binding lignocellulosic fibreboards has been investigated. Different high-density fibreboards (HDF) were hot-pressed based on a mixture of grey alder (Alnus incana L. Moench) wood chips processed by steam explosion auto-hydrolysis (SE) and 15% or 25% lignin content from three different industrial sources: softwood kraft lignin (SWKL), soda wheat straw lignin (SoWhStL) and hydrolysis wheat straw lignin (HWhStL). Density, thickness swelling (TS) after immersion in water for 24 h, modulus of rupture (MOR), modulus of elasticity (MOE) and strength of internal bond (IB) of the board samples were determined. The amount (15% or 25%) and moisture content (MC) (18±1% or 5±2%) of the added lignin affected all the tested properties of the HDF except for density. However, the kind of the added lignin affects the obtained fibreboard more significantly compared to the control sample made without an admixture of lignin. In some cases, the tested values were diminished to half. The tested properties of the HDF samples produced with SoWhStL or HWhStL are compatible with standard requirements for medium-density fibreboard (MDF) for general use under dry conditions (EN 622-5, MDF), however, it depends on the lignin amount and MC.
Acknowledgements
The study has been made within the framework of the Wood Wisdom project “ProLignin – High-Value Products from Lignin Side-streams of Modern Biorefineries” and the Latvian National Research Programme Project 3. “Biomaterials and Bioproducts with extensive use of forest resources” 2014–2017 with financial support of the State Forest Service of Latvia. The authors are grateful to the staff of Forest and Wood Products R&D Institute, Jelgava, Latvia for the pressing and testing equipments.
References
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Original Articles
- About structural changes of lignin during kraft cooking and the kinetics of delignification
- Utilization of lignin powder for manufacturing self-binding HDF
- Consecutive determination of softwood kraft lignin structure and molar mass from NMR measurements
- Production of hemicellulose oligomers from softwood chips using autohydrolysis followed by an enzymatic post-hydrolysis
- Morphological features of aerogels and carbogels based on lignosulfonates
- Wood based activated carbons for supercapacitor electrodes with sulfuric acid electrolyte
- New insights into the decomposition mechanism of chlorine dioxide at alkaline pH
- Upgrading of commercial pulps to high-purity dissolving pulps by an ionic liquid-based extraction method
- Hardwood kraft pulp structural features affecting refinability
- Brightness stability of eucalyptus-dissolving pulps: effect of the bleaching sequence
- Cellulose fiber based fungal and water resistant insulation materials
- Biomass conversion into blow-in heat insulation materials by steam explosion
- Effect of cationic polyelectrolytes in contact-active antibacterial layer-by-layer functionalization
- Nanocelluloses obtained by ammonium persulfate (APS) oxidation of bleached kraft pulp (BKP) and bacterial cellulose (BC) and their application in biocomposite films together with chitosan
- Volatile terpene extraction of spruce, fir and maritime pine wood: supercritical CO2 extraction compared to classical solvent extractions and steam distillation
- Protective effects of proanthocyanidins extracts from the bark of deciduous trees in lipid systems
- Short Notes
- Steam explosion treatments of technical hydrolysis lignin
- Moisture absorption properties of hardwood veneers modified by a sol-gel process
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Original Articles
- About structural changes of lignin during kraft cooking and the kinetics of delignification
- Utilization of lignin powder for manufacturing self-binding HDF
- Consecutive determination of softwood kraft lignin structure and molar mass from NMR measurements
- Production of hemicellulose oligomers from softwood chips using autohydrolysis followed by an enzymatic post-hydrolysis
- Morphological features of aerogels and carbogels based on lignosulfonates
- Wood based activated carbons for supercapacitor electrodes with sulfuric acid electrolyte
- New insights into the decomposition mechanism of chlorine dioxide at alkaline pH
- Upgrading of commercial pulps to high-purity dissolving pulps by an ionic liquid-based extraction method
- Hardwood kraft pulp structural features affecting refinability
- Brightness stability of eucalyptus-dissolving pulps: effect of the bleaching sequence
- Cellulose fiber based fungal and water resistant insulation materials
- Biomass conversion into blow-in heat insulation materials by steam explosion
- Effect of cationic polyelectrolytes in contact-active antibacterial layer-by-layer functionalization
- Nanocelluloses obtained by ammonium persulfate (APS) oxidation of bleached kraft pulp (BKP) and bacterial cellulose (BC) and their application in biocomposite films together with chitosan
- Volatile terpene extraction of spruce, fir and maritime pine wood: supercritical CO2 extraction compared to classical solvent extractions and steam distillation
- Protective effects of proanthocyanidins extracts from the bark of deciduous trees in lipid systems
- Short Notes
- Steam explosion treatments of technical hydrolysis lignin
- Moisture absorption properties of hardwood veneers modified by a sol-gel process