This invention discloses a protective
composite material, its preparation method, and its application. The preparation method includes: modifying a two-dimensional lightweight material to obtain a modified two-dimensional lightweight material; and self-assembling the modified two-dimensional lightweight material with a two-dimensional heavy material, followed by annealing to obtain the protective
composite material; wherein the modified two-dimensional lightweight material and the two-dimensional heavy material have opposite
surface charges. This invention, through the microscopic composite and macroscopic
assembly of two-dimensional lightweight and two-dimensional heavy materials, prepares a protective material that can significantly increase the interaction area between the shielding components and
radiation, significantly reduce the interparticle
porosity of the protective material, improve the
utilization rate of the protective material, and enhance the interfacial forces between heterogeneous materials.