Jaša Saražin1, Antonio Pizzi2, Siham Amirou2, Detlef Schmiedl3, Milan Šernek1,*
Journal of Renewable Materials, Vol.9, No.5, pp. 881-907, 2021, DOI:10.32604/jrm.2021.015047
Abstract A non-isocyanate-based polyurethane (NIPU) wood adhesive was produced from organosolv lignin, which is a
bio-sourced raw material, available in large quantities and produced as a by-product of the paper industry.
The formulation of this new lignin-based NIPU adhesive, which is presented, was chemically characterised by
Matrix-Assisted Laser Desorption Ionization Time of Flight (MALDI ToF) mass spectrometry and by Fourier
Transform Infra-Red (FTIR) spectrometry analyses. The oligomers formed were determined and showed that
the three species involved in the NIPU adhesive preparation were formed by the co-reaction of the three reagents
used: lignin, dimethyl carbonate, and hexamethylene diamine. Linear and branched… More >
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