Modification methods of soy protein adhesive and its application

Abstract

Soybean protein adhesive is loved by the society because of its low price, simple preparation, non-toxicity to the environment and easy decomposition. However, the soybean protein adhesive itself is easy to crack when exposed to water, the viscosity is insufficient, and there are many changes in individual users. This research will describe several methods of modifying soy protein to enhance various properties of soy protein adhesives. The first method is heat treatment, which folds the molecules of the soy protein adhesive to strengthen it. The second is a cross-linking treatment that allows soy protein to form a network with other agents to enhance its structure through chemical bonds. The third is graft copolymerization, where other agents are grafted onto the soy protein adhesive to give it some good properties. The fourth is blending, where the soy protein adhesive is mixed with other adhesives so that the new homogeneous mixture has the properties of both adhesives. And with the development of these researches, application of the modified soybean protein adhesives is further introduced.