Huang Yuefeng, Yang Yaohong, He Di, Liu Li, Wang Peng, Bi Wei, Kan Zhenqiang, Xu Kaimeng, Du Guanben, Zhang Lianpeng
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China.
College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
Int J Biol Macromol. 2025 Jan;284(Pt 1):138121. doi: 10.1016/j.ijbiomac.2024.138121. Epub 2024 Nov 26.
As awareness of building safety and fire prevention grows, the demand for fire-retardant materials is gradually increasing. The need for flame-retardant wood composites is particularly urgent in public, high-rise, and commercial buildings. However, most of the current research has focused on adding flame retardants, often at the expense of mechanical properties. This study prepared a fully bio-based flame retardant, high-strength, and boiling water resistant adhesive using supramolecular self-assembly strategy. In this work, chitosan, malic acid, and phytic acid were dissolved in water in one step, and the resulting adhesive is fully bio-based and environmentally friendly. Next, this adhesive had been applied to multi-layer wooden boards to prepare wood composites with excellent mechanical properties (the highest shear dry strength was 1.66 MPa). Furthermore, the crosslinked network created by the ester and amide bonds provides the wood composites with exceptional water resistance (the highest shear strength after boiling water treatment was 1.13 MPa). More importantly, the wood composites obtained have excellent flame retardancy (LOI = 30.2 %) compared to natural wood. Therefore, this work provides a reference for producing water-resistant and flame-retardant wood materials without compromising their mechanical properties.
随着建筑安全和防火意识的提高，对阻燃材料的需求逐渐增加。在公共建筑、高层建筑和商业建筑中，对阻燃木质复合材料的需求尤为迫切。然而，目前的大多数研究都集中在添加阻燃剂上，这往往是以牺牲机械性能为代价的。本研究采用超分子自组装策略制备了一种全生物基的阻燃、高强度且耐沸水的胶粘剂。在这项工作中，壳聚糖、苹果酸和植酸一步溶解于水中，所得胶粘剂是全生物基且环保的。接下来，将这种胶粘剂应用于多层木板上，制备出具有优异机械性能的木质复合材料（最高剪切干强度为1.66MPa）。此外，由酯键和酰胺键形成的交联网络赋予了木质复合材料出色的耐水性（沸水处理后的最高剪切强度为1.13MPa）。更重要的是，与天然木材相比，所制备的木质复合材料具有优异的阻燃性（极限氧指数为30.2%）。因此，这项工作为生产不影响机械性能的防水阻燃木材材料提供了参考。
