Preparation method of lignin-based polyurethane adhesive for reed artificial board

The invention discloses a lignin-based polyurethane adhesive for a reed artificial board and a preparation method of the lignin-based polyurethane adhesive, lignin is degraded through microwave-assisted DES, and then depolymerized lignin and isocyanate are synthesized to obtain the lignin-based polyurethane adhesive. And the artificial reed board is obtained through sizing, hot pressing and later processing. The internal bonding strength of the product meets the standard of wheat (rice) straw shaving board, the formaldehyde release amount meets the standard of formaldehyde release limit in indoor decoration material artificial boards and products thereof, the reed artificial board with better performance can be produced with lower cost, on one hand, the utilization channel of lignin can be widened, high-value utilization of lignin is achieved, and on the other hand, the environment is protected; on the other hand, the performance of the polyurethane adhesive can be improved, and the cost of the polyurethane a