Strong and Weather‐Resistant Wood Bonding Enabled by Cell Wall–Inspired Ether‐Anchored Lignin

Summary

No reviewed summary yet. Read the abstract below or open the original publication.

Abstract

The weather resistance of bonding interfaces is a crucial prerequisite for scaling up bio‐based adhesives in the plywood industry; however, achieving a balance between mechanical robustness and green sustainability remains a major challenge. Inspired by the hierarchical composite interfaces of natural wood cell walls, a bioinspired lignin–carbohydrate matrix interfacial design strategy is proposed. Through controlled etherification between trimethylolpropane triglycidyl ether (TMPTE), lignin, and cellulose, lignin molecules are covalently anchored onto wood fibers, constructing a robust cross‐linked network analogous to natural cell wall architecture. The resulting bio‐adhesive exhibits exceptional bonding performance, with the dry strength enhanced from 1.11 ± 0.15 to 12.57 ± 1.25 MPa and the wet strength increased from 0 to 3.06 ± 0.38 MPa, surpassing most conventional petroleum‐based adhesives. Moreover, the adhesive maintains structural integrity under extreme conditions, including boiling water, cryogenic, high‐temperature, acidic/alkaline, and organic solvent environments. This work breaks through the long‐standing limitation of poor weather resistance in bio‐based adhesives and establishes a feasible and sustainable pathway toward robustness, low‐carbon structural bonding materials.

Abstract as supplied by the source. Full text may be restricted by the publisher.