▎ 摘　　要

NOVELTY - Non-covalent bond cross-linked high-strength and high-toughness plastic recyclable composite material comprises polyurethane, polyphenol compound, metal ion compound and modified two-dimensional material, where the modified two dimensional material is the two- dimensional material modified by ellagic acid surface. USE - The non-covalent bond cross-linked high-strength and high-toughness plastic recyclable composite material is useful for aerospace, electronic, military, civil engineering and mechanical field (claimed). ADVANTAGE - The composite material provides high-strength and high-toughness properties through multiple non-covalent bond synergism. The composite material has excellent mechanical property and can be plasticized and recycled. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the preparation method of non-covalent bond cross-linked high-strength and high-toughness plastic recyclable composite material comprising (1) mixing modified two-dimensional material, polyphenol compound, metal ion in water, adjusting the pH to 5-8.5, and reacting to obtain the intermediate product; (2) dropping the intermediate product into the polyurethane solution while stirring and blending, after finishing reaction, mixing and pressing into a mold and drying by a mixing machine to obtain the product.