Tanning extract foam material with electromagnetic shielding function and preparation method thereof

The invention belongs to the technical field of electromagnetic shielding materials and preparation, and particularly relates to a tannin extract foam material with an electromagnetic shielding function and a preparation method of the tannin extract foam material. The tannin extract resin is prepared by modifying the tannin extract, and then the tannin extract resin is mixed with the functional conductive nano material to prepare the electromagnetic shielding foam material, so that the conductive material is uniformly distributed on the foam hole wall, and the electromagnetic shielding function of the foam material is realized due to the microporous special structure of the tannin extract foam material; meanwhile, the tannin extract is modified, so that the foam material has better flame-retardant and heat-insulating properties, the application range is expanded, new requirements of the electromagnetic shielding material are met, and the high-performance, environment-friendly and degradable electromagnetic sh