▎ 摘　　要

NOVELTY - Lignosulfonic acid-based functionalized graphene prepared by ball milling by sodium lignosulfonate and graphite powder. USE - The soybean protein adhesive is useful in improving the water-resistant bonding strength of wood-based panels (claimed) i.e, boards. ADVANTAGE - The modified soybean protein adhesive is capable of satisfy water requirement of adhesive for plywood, ensuring the practical performance of the soybean protein adhesive; It solves the problem of indoor air pollution caused by common trialdehyde plywood. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Preparing the lignosulfonic acid group functionalized graphene comprising introducing sodium lignosulfonate and graphite powder in the ball mill tank, carrying out ball mill, taking ball mill, dissolving the product in distilled water, and carrying out suction filtration and cleaning until the filtrate becomes colorless and transparent; taking the filter cake and dissolving in distilled water and ultrasonically tip the filter cake to fully disperse the filter cake, centrifuging the filtrate after the filter cake is dispersed, and the upper layer suspension is Lignosulfonate functionalized graphene; and A soybean protein adhesive, comprises soybean protein powder, triglycidylamine, and the lignosulfonic acid group functionalized graphene; and Preparing the soybean protein adhesive comprising (1) dispersing triglycidyl amine in the dispersion medium; (2) uniformly dispersing the lignin sulfonic functional graphene in the triglycidyl amine dispersion, (3) uniformly dispersing soybean protein powder in the step (2) to obtain the triglycidyl amine and lignin sulfonic functional graphene dispersion liquid, high speed stirring to obtain the lignin sulfonic functional graphene modified soybean protein adhesive