The influence of wave-absorbing functional particles on the electromagnetic properties and the mechanical properties of coated fabrics

Abstract

The single-layer coated fabric was prepared using the polyurethane and the coating technology on the nylon. The influence of the wave-absorbing functional particles (graphene, graphite, hydroxy nickel powders, micron iron powders, silver-coated copper powders, silver-coated hollow glass beads) on the electromagnetic properties and the mechanical properties of coated fabrics was explored. Results showed that within the frequency range of 0 MHz∼1000 MHz, when the ratio of contents of the graphite as the wave-absorbing functional particle and the graphene was 1:1, the real and imaginary parts and the loss tangent of the dielectric constant of the graphene single-layer coated fabric were all the largest, namely the material’s polarizing ability, the loss ability and the attenuation ability to electromagnetic waves were all the strongest; within the frequency range of 0 MHz∼40 MHz, when the ratio of contents of the micron iron powder as the wave-absorbing functional particle and the graphene was 1:1, the shielding effectiveness of graphene single-layer coated fabric was the largest, the shielding ability to electromagnetic waves was the the strongest.