Substitution of Phenolic Components by Steam-Exploded Lignin in Plywood and Self-Binding Boards with Account of Energy Vecessary for Steam Explosion Treatment
2010
Jānis Grāvītis, Janis Abolins, Ramunas Tapciauskas, Andris Vēveris, Bruno Alksnis

By using lignin extracted from steam-exploded wood as adhesive in plywood and hot-pressed fibreboards to substitute phenol-formaldehyde resins is reported. Mixtures of commercial phenol-formaldehyde resins containing 10 % lignin by weight tested as plywood binders under conditions of factory production show satisfactory cohesion. Properties of sample boards containing different amount of lignin adhesive are compared between themselves and with the EU standards for fibreboards. A strong correlation of density and form stability under humid conditions with the lignin content is found. Results of testing mechanical properties of the boards suggest that effect of lignin on mechanical strength depends on the size of particles and hot-pressing temperature. Steam explosion and hot-pressing technologies tested in the study are shown to have potential of utilizing low-quality wood and waste from forest industry to make value-added products. The estimates based on a simple model of energy flows show the energy required by steam explosion pre-treatment of biomass being within 10 % of the heat content of biomass.


Atslēgas vārdi
steam explosion (SE), SE lignin, plywood, fibreboard, SE energy evaluation

Gravitis, J., Abolins, J., Tapciauskas, R., Veveris, A., Alksnis, B. Substitution of Phenolic Components by Steam-Exploded Lignin in Plywood and Self-Binding Boards with Account of Energy Vecessary for Steam Explosion Treatment. Materiālzinātne un lietišķā ķīmija . Nr.21, 2010, 7.-11.lpp. ISSN 1407-7353.

Publikācijas valoda
English (en)
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