A highly efficient method was developed for preparing wheat gluten (WG) based wood adhesives with high performance using ethanol and isophorone diisocyanate (IPDI) as main chemical additives. The performance of the resulting adhesives was evaluated by manufacturing artificial wood products (AWP). The effects of IPDI content on the water resistance, viscosity, solid content and modification mechanism of the adhesives and the optimal method to prepare artificial wood products were investigated. The results showed that ethanol could disperse the stacked protein structures and expose some internal groups of proteins, so that IPDI could be cross-linked with protein molecules to form a more compact three-dimensional reticulum protein structure, confirmed by both the increases of the decomposition temperature and the smoother and more uniform surface of the resulting adhesives. The structural changes enhanced the hydrophobicity of the modified adhesive samples and were beneficial to resist the invasion of water molecules, which improved the water resistance of the adhesives. When the IPDI concentration was 15 wt%, the dry and wet shear strength of the adhesive reached 2.61 MPa and 0.97 MPa with the best water resistance respectively, and the viscosity and solid content increased to 32.8 Pa·s and 34.41 %, respectively. It was found that the resulting adhesives had better performance and could be used as an environment-friendly plywood adhesive instead of petroleum-based adhesive, which was more conducive to the extension of the wheat industry chain to high value-added products.

开发了一种以乙醇和异佛尔酮二异氰酸酯（IPDI）为主要化学助剂制备高性能小麦面筋（WG）基木材胶粘剂的高效方法。通过制造人造木制品 (AWP) 来评估所得粘合剂的性能。研究了IPDI含量对胶粘剂的耐水性、粘度、固含量和改性机理的影响以及制备人造木制品的最佳方法。结果表明，乙醇可以分散堆积的蛋白质结构并暴露一些内部蛋白质基团，使IPDI可以与蛋白质分子交联，形成更紧密的三维网状蛋白质结构，分解温度的增加和所得粘合剂的更光滑和更均匀的表面都证实了这一点。结构变化增强了改性粘合剂样品的疏水性，有利于抵抗水分子的侵入，提高了粘合剂的耐水性。当IPDI浓度为15 wt%时，胶粘剂的干湿剪切强度分别达到2.61 MPa和0.97 MPa，耐水性最好，粘度和固含量分别增加到32.8 Pa·s和34.41%。结果表明，所得胶粘剂性能更好，可作为环保胶合板胶粘剂替代石油基胶粘剂，更有利于小麦产业链向高附加值产品延伸。