提高大豆基胶黏剂的耐水性是木材胶黏剂研究的重点和热点。本项目采用生物和化学方法对脱脂豆粉组分中的官能团进行定向修饰；再设计环氧氯丙烷接枝定向修饰后的官能团，引入环氧基，增强活性，提高大豆基胶黏剂的耐水胶合力；借助NMR、XPS、DSC、IR、TEM、SEM等表征手段剖析脱脂豆粉组分中官能团在定向修饰及接枝过程中产物的结构特征、理化现象；阐明脱脂豆粉中官能团的活化条件，解析在官能团上引入环氧基的有利机制，探索脱脂豆粉环氧化后对豆胶耐水性的影响规律，揭示环氧氯丙烷接枝改性脱脂豆粉提高大豆基胶黏剂耐水胶合力的机理，为环保型耐沸水大豆基胶黏剂及类似生物质基木材胶黏剂的研究提供新思路。

Improving water resistance of soy-based adhesives (SBAs) is a key point of the SBAs as wood adhesives. The aim of this project was to improve water-resistant gluability of SBAs by inducing epoxy groups into its raw materials --- defatted soy flour (DSF). Biological and chemical approaches will be used to targeted modification the functional groups in DSF, and then epoxy groups were introduced by grafting epichlorohydrin onto the targeted modified functional groups in DSF. The molecular structure and phys-chemical phenomenon of the products formed during targeted modification and grafting process of functional groups in DSF were characterized by NMR, XPS, DSC, IR, TEM, and SEM. Based on these characterization results and overall studies on water-resistant gluability of the developed SBAs, the active conditions of functional groups in DSF, grafting mechanism of epichlorohydrin, and the mechanism of improved water-resistant gluability of SBAs via grafting epichlorohydrin onto the DSF were finally exploited. The project intends to provide new ideas for preparing a boiling-water resistant eco-biomass-based adhesive and other bio-based adhesives for wood industry.