A new soy flour-polyepoxide adhesive system for making interior plywood

摘要

In this study, triglycidylamine (TGA) was synthesized and evaluated as a crosslinking agent for soy flour (SF) for making five-ply plywood from yellow poplar. Glycerol polygly-cidyl ether (GPE) and trimethylolpropane triglycidyl ether (TTE) were also investigated as crosslinking agents for SF as adhesive for plywood. The plywood panels bonded with SF-TGA and SF-GPE adhesives did meet and those with SF-TTE adhesive did not meet the water-resistance requirement for interior application. The former two adhesives are formaldehyde-free, environmentally friendly, easy to use and readily available. They can be derived completely from renewable materials. The adhesion mechanisms are discussed in detail.