Dual-network crosslinking type self-healing electromagnetic shielding material and preparation method thereof

The invention discloses a dual-network cross-linked self-healing electromagnetic shielding material and a preparation method thereof, MXene with a layered structure is prepared, then protonic acid is used as a dopant for in-situ polymerization to obtain an MXene/polypyrrole compound with good conductivity, then the MXene/polypyrrole compound is used as a conductive filler, and the dual-network cross-linked self-healing electromagnetic shielding material is prepared. Polyvinyl alcohol is used as a polymer matrix to construct the boric acid and cellulose nanocrystal double-network cross-linked electromagnetic shielding composite material with good self-healing performance. The composite material shows excellent electromagnetic shielding performance in an L wave band and an X wave band, has a good self-healing characteristic, forms hydrogen bonds by contacting a surface which is divided into two parts or spraying water, enables a damaged area to realize self-repairing, and has a good application value in the fie