Strong Fully Reprocessable Engineered Wood Composites.

Authors

Xilin Zhang, Zheng Liu, Zhezhe Zhou, Mark Lynch, Jianzhang Li, Paulomi Burey, Jingchao Li, Cheng Zhang, Qiang Gao, Pingan Song

Published in

Advanced materials (Deerfield Beach, Fla.). Pages e75232. Oct 07, 2026. Epub Oct 07, 2026.

Abstract

Developing fully reprocessable engineered wood composites (EWCs) with high mechanical strength under mild fabrication conditions remains a significant challenge. Here, a hyperbranched adhesive with complementary imine-bond and hydrogen-bond networks was designed and combined with wood particles to fabricate a wood composite (WP/HTP) by hot pressing at 120°C. The hyperbranched structure and multiple hydrogen bonds of the adhesive minimize steric hindrance while facilitating molecular-chain mobility, thereby synergistically accelerating imine-bond exchange. The WP/HTP exhibits outstanding reprocessability, retaining 100% of its mechanical properties after three cycles of reprocessing. Meanwhile, the reprocessed WP/HTP exhibits a modulus of rupture (MOR) of 89 MPa and a modulus of elasticity (MOE) of 5.2 GPa, far surpassing those of current commercial EWCs, which typically exhibit recovery rates of 3%-18%, MOR of 1-5 MPa, and MOE of 0.1-0.8 GPa. This study provides a practical strategy for fabricating strong, reprocessable EWCs for advanced manufacturing and represents a fundamental approach to addressing the wood-waste problem.

PMID:
42839850
Bibliographic data and abstract were imported from PubMed on 07 Oct 2026.

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