▎ 摘　　要

NOVELTY - Preparing lightweight high-strength composite material imitating shells involves preparing graphene oxide by an improved Hummers oxidation method, and dissolvign with deionized water to prepare a colloidal graphene oxide solution. The leaf-shaped amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheets is prepared by redox method, and dissolved with deionized water to prepare an amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheet solution, stirred and mixed the amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheet solution and graphene oxide solution with biological macromolecules to obtain a stable mixed solution. The mixed solution is transferred into a petri dish, and performed evaporative self-assembly in an oven at 55-65 degrees C, peeled off the assembled composite film to obtain a composite film with high mechanical properties. USE - Method for preparing lightweight high-strength composite material imitating shells. ADVANTAGE - The method is easy to operate, process is green and environment friendly, and the strength of the finally obtained bulk composite material is far better than most other graphene oxide-based bulk composite materials. DETAILED DESCRIPTION - Preparing lightweight high-strength composite material imitating shells involves preparing graphene oxide by an improved Hummers oxidation method, and dissolvign with deionized water to prepare a colloidal graphene oxide solution. The leaf-shaped amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheets is prepared by redox method, and dissolved with deionized water to prepare an amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheet solution, stirred and mixed the amorphous/crystalline heterogeneous manganese oxide hexagonal nanosheet solution and graphene oxide solution with biological macromolecules to obtain a stable mixed solution. The mixed solution is transferred into a petri dish, and performed evaporative self-assembly in an oven at 55-65 degrees C, peeled off the assembled composite film to obtain a composite film with high mechanical properties. A number of composite films are assembled into one body in a layer-by-layer brush coating manner using a crosslinking agent, and hot-pressed to obtain a shell-like lightweight high-strength composite material.