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From residues to resources: Fraunhofer WKI advances bio-based, formaldehyde-free adhesives for particleboard
Within the “LowEPanel” project, Fraunhofer WKI and partners are trialling formaldehyde-free lignin–HMF condensation resins for the manufacture of sustainable particleboards from regional wood residues, aiming to establish fully bio-based binders and optimise the value chain.
The construction and furniture sectors are increasingly seeking sustainable material solutions. Researchers at Fraunhofer WKI are developing bio-based adhesives derived from renewable resources and biogenic residues. In “LowEPanel”, formaldehyde-free lignin–HMF resins are being tested for particleboards produced from regional wood residues and recycled wood. The aim is to establish high-quality bio-based materials while enhancing product recyclability.
Lignin is a side stream from pulp and bioethanol production and thus a readily available resource. Hydroxymethylfurfural (HMF), obtained via sugar dehydration, serves as a platform chemical for resin and adhesive synthesis. Combining both yields a formaldehyde-free binder that avoids the release of hazardous formaldehyde and reduces reliance on fossil feedstocks.
Emphasis on the full processing chain
Beyond resin development, the consortium assesses whether alternative wood species from climate-resilient mixed forests can be used for particleboard production. Responding to forest transformation, the project opens new sourcing pathways. Building on the predecessor project “AdLigno”—which delivered one-hundred-per-cent bio-based, formaldehyde-free lignin–HMF resins at lab scale—“LowEPanel” now addresses scale-up, dosing technology and industrial processing.
The entire value chain is involved: from raw material suppliers through material and process development and larger-scale resin synthesis to particleboard manufacturers. This integrated approach is intended to accelerate the transfer of bio-based adhesives into industrial applications, conserving resources and improving the recyclability of wood-based panels.
Source: Fraunhofer WKI. From residues to resources: Bio-based adhesives for wood-based materials. Press release, 02 October 2025.
