Eco-Friendly Materials for Chemical Products Manufacturing: Adhesives Derived from Biomass and Renewable Resources

Gómez-Jiménez-Aberasturi, Olga

doi:10.1007/978-3-319-48281-1_154-1

Cited by 2 publications

(1 citation statement)

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“…In most lignin‐based phenolic resins, technical lignin must be modified to increase the number of reactive sites, such as hydroxymethylation, phenolation, ionic liquid modification, oxidative depolymerizaton, demethylation, and liquefaction . However, these strategies have limitations on the substitution rate of lignin and commercial development because of environmental concerns . In addition, most lignin used in the production of phenolic resins originates from raw materials of softwood and gramineous plants that have abundant guaiacyl and p ‐hydroxyphenyl units as the amounts of reactive site in guaiacyl units and p ‐hydroxyphenyl units are much higher than that in syringyl units from hardwood .…”

Section: Introductionmentioning

confidence: 99%

Valorization of Technical Lignin for the Production of Desirable Resins with High Substitution Rate and Controllable Viscosity

et al. 2020

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The valorization of lignin to replace phenol is significant in the production of phenolic resins. However, a great challenge is to produce lignin‐based resin (LR) with a suitable viscosity and high substitution rate of lignin to phenol. In this study, LRs were produced using hardwood technical lignin derived from the pulping industry. Structural analysis of the LRs indicated that the unsubstituted para and ortho carbon atoms of the aromatic ring influenced the curing temperature and activation energy of the resins. The curing kinetics and thermal decomposition study implied that urea and methylene groups in cured LRs were significant factors that affected the thermal stability negatively. The prepared LRs showed desirable features if used as adhesives to make plywood. This is the first approach in which a substitution rate of up to 65 % is achieved for low‐reactive‐site hardwood lignin, which provides a solution to the challenge of the simultaneous realization of the high addition of lignin and the adaptive viscosity of resins.

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Section: Introductionmentioning

confidence: 99%