Wood Science and Technology

, Volume 54, Issue 1, pp 103–121 | Cite as

Liquefaction of alder wood as the source of renewable and sustainable polyols for preparation of polyurethane resins

  • Kamila GoszEmail author
  • Daria Kowalkowska-Zedler
  • Józef Haponiuk
  • Łukasz PiszczykEmail author


Liquefaction of wood-based biomass gives different polyol properties depending on the reagents used. In this article, alder wood sawdust was liquefied with glycerol and poly(ethylene glycol) solvents. Liquefaction reactions were carried out at temperatures of 120, 150 and 170 °C. The obtained bio-polyols were analyzed in order to establish the process efficiency, hydroxyl number, acid value, viscosity and structural characteristics using Fourier transform infrared (FTIR), carbon (13C) and proton (1H) NMR analyses. The results indicate that the optimal conditions for the liquefaction process are at 150 °C for 6 h. The results of the FTIR spectra analysis and the hydroxyl number in the range of 214–687 mg KOH/g showed that the obtained bio-polyols are a potential substitute for petrochemical polyols commonly used for the synthesis of polyurethane polymers. Polyurethane resins containing 90 wt% of bio-polyol were obtained by a one-step method using a hydraulic press. The material was pressed for 15 min (5 MPa) at 100 °C with an NCO/OH ratio in the range of 0.9–1.2. Dynamic mechanical thermal analysis (DMA) showed high cross-linking density and modulus of elasticity in a wide range of 62–1362 MPa.



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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Polymers Technology, Chemical FacultyGdansk University of TechnologyGdańskPoland
  2. 2.Department of Inorganic Chemistry, Chemical FacultyGdańsk University of TechnologyGdańskPoland

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