丙烯酰胺改性降解大豆蛋白复合胶黏剂

Composite Adhesive from Degraded Soybean Protein Modified by Acrylamide

目的对大豆蛋白胶黏剂进行改性研究,通过改性手段来提高胶黏剂的胶合强度。方法采用丙烯酰胺改性在碱性环境下降解的大豆蛋白来制备胶黏剂,并对胶黏剂的胶合强度等方面的性能进行测试。结果通过正交试验确定了最佳工艺条件,即丙烯酰胺（AM）,马来酸酐（MA）和质量分数为30%的过硫酸铵（APS）的质量比为12∶50∶10时,并在p H值为11的碱性条件下胶合强度最好,胶合强度达到0.91 MPa,符合GB/T 9846—2004Ⅱ类胶合板的要求。结论通过实验可以得到固含量为24%~28%的改性大豆蛋白胶。

The work aims to study on the modification of soybean protein adhesive and improve the bonding strength of the adhesive through modification approach. Acrylamide-modified soybean protein degraded in alkaline environment was used to prepare the adhesive. The bonding strength of the adhesive was tested. Optimal technological conditions were determined by orthogonal test. When acrylamide（AM）∶maleic anhydride（MA）∶APS（30%） = 12∶50∶10 and p H=11, the adhesive had the best bonding strength（0.91MPa）, and met the requirements on category II plywood specified in GB/T 9846—2004. In conclusion, modified protein adhesive containing 24%~28% solid can be obtained through the experiment.