大豆蛋白改性和黏合性研究

为解决石油生产的黏合刑的环境毒性问题，以大豆分离蛋白(SPI)为原料，经加热(H)、胰蛋白酶(T)、碱(A)、尿素(U)和盐酸胍(GH)改性，分别制得改性大豆蛋白H-SPI、T-SPI、A-SPI、U-SPI和GH-SPI。将其用作不同硬度木质的黏合剂，经试验测定表明它们的黏合强度和阻水性都优于未改性SPI。还对几种改性方法进行了比较，结果表明尿素改性和碱改性是比较好的两种方法。

Modification of Soybean Proteins and their Adhesive Properties on Woods

In order to eliminate the environmental and toxicity problems of adhesives produced from petroleum,investigations were carried out on the adhesive and water resistance properties of soybean protein isolates(SPI)that were modified by heating(H),trypsin(T),alkali(A),urea(U)and guanidine hydrochloride(GH).Determination with glued wood pieces of different kinds of wood indicates that adhesive strength and water resistance of modified proteins are all superior to that of unmodified proteins.Different modification methods were also compared,and the result show that modification with alkali and urea is better than that with heating,trypsin and GH.