Zhang Shiying, Koskela Salla, Meinhard Halvar, Penttilä Paavo, Awais Muhammad, Linder Markus B, Wang Shennan, Rautkari Lauri
Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland.
Center of Excellence in Life-Inspired Hybrid Materials, Aalto University, Espoo, Finland.
Nat Commun. 2025 Aug 25;16(1):7902. doi: 10.1038/s41467-025-63239-y.
The growing use of timber in construction has created an urgent need for high-performing engineered wood. Laminating timber facilitates production of structural components, but strong interfacial bonding is essential for engineered wood to outperform solid wood. Here we introduce a method for achieving strong wood bonding using an ionic liquid-dissolved cellulose solution. At the bonding interface, the dissolved cellulose fills the lumina and entangles with the wood cell wall, forming a dense cellulose network interconnecting with wood upon regeneration in water. Concurrent hot-pressing forms a permanently interlocked structure of wood cells. The multiscale bonded interface is water resistant with a shear strength over 20 MPa, nearly twice that of solid wood. This work presents an eco-friendly, high-performing wood bonding mechanism with promising applications in engineered wood products.
木材在建筑中的使用日益增加，这使得对高性能工程木材的需求变得紧迫。层压木材便于生产结构部件，但强大的界面粘结对于工程木材超越实木至关重要。在此，我们介绍一种使用离子液体溶解的纤维素溶液实现强力木材粘结的方法。在粘结界面处，溶解的纤维素填充细胞腔并与木材细胞壁缠结，在水中再生时形成与木材相互连接的致密纤维素网络。同时进行的热压形成了木材细胞的永久互锁结构。这种多尺度粘结界面具有防水性，抗剪强度超过20兆帕，几乎是实木的两倍。这项工作提出了一种生态友好、高性能的木材粘结机制，在工程木制品中具有广阔的应用前景。
