苯酚改性豆基蛋白胶黏剂的制备及胶接强度的研究

通过对大豆粉采用碱处理使大豆蛋白质大分子结构展开，暴露出的官能团进一步与甲醛反应生成稳定的蛋白质，这种物质与苯酚共聚反应生成改性豆基蛋白胶黏剂。采用单因素实验方法，探讨了改性豆基蛋白胶黏剂压制杨木三层胶合板的胶合工艺。分析了热压温度、热压时间和涂胶量对胶合板胶合性能的影响。结果表明：采用改性后的豆基蛋白胶黏剂，在压力为1．4MPa，温度为165℃左右，热压时间为1．4～1．6min·mm^-1，涂胶量为220g·m^-2，压制的杨木胶合板胶合性能较佳且达到Ⅰ类胶合板的标准。

Study on Preparation and Bond Properties of Soy - based Protein Adhesive Modified by Phenol

The soybean flour is treated with hot caustic to denature the protein. Once the denaturation has opened the protein structure, the exposed functional groups can react with formaldehyde to produce a stable protein. Then this substance can react with phenol to produce a modified soy based protein adhesive. The solution to the optimum bonding technology of modified soy - based protein adhesive in poplar plywood manufacture is obtained by the single factor experimental method, in which three factors, such as hot-pressing temperature, time, and glue spread are analyzed. The results show that when the hot -pressing pressure is 1.4MPa, the temperature is about 165℃ , the time is between 1.4 and 1.6min · mm^-1 and the glue spread is 220g·m^-2, the bond properties of the poplar plywood are preferable and can meet the Chinese national standard of type Ⅰ plywood.