Drvna industrija, Vol. 76 No. 2, 2025.
Izvorni znanstveni članak
https://doi.org/10.5552/drvind.2025.0232
Properties of Phenol-Formaldehyde Resin Modified with Kraft Lignin for Particleboard Production
Miroslav Němec
; Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Luboš Prokůpek
; Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
Jaromír Hradecký
; Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Vojtěch Obst
; Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
Tomáš Pipíška
; Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
Štepan Hysek
orcid.org/0000-0001-8642-0847
; Czech University of Life Sciences Prague, Faculty of Forestry and Wood Sciences, Prague-Suchdol, Czech Republic
Sažetak
Lignin is a natural polymer with a phenolic structure, which makes it suitable as a substitute in phenol-formaldehyde (PF) resins. In this study, unmodified kraft lignin was used as a substitute in a commercial phenol-formaldehyde resin, with the substitution rate being 10 %. This resin was further used to produce a singlelayer particleboard using hot pressing in a laboratory press. Results of physical and mechanical tests showed that the addition of lignin to the PF resin negatively affected these properties, while particleboards bonded with lignin-modified PF resin met the requirements of the standard for lower-class particleboards. Scanning electron microscopy confirmed cohesive failures in ruptured particleboards bonded with both the reference resin and the lignin-modified PF resin. For the lignin-modified PF resin, particles of undissolved lignin were found in the resin. Further testing showed no difference in the emission of volatile organic compounds between the variants.
Ključne riječi
Wood-based composite; lignin; adhesive; mechanical properties; physical properties
Hrčak ID:
332610
URI
Datum izdavanja:
25.5.2026.
Posjeta: 895 *