Reduced graphene oxide decorated two-dimensional FeSiCr nanosheets for improving flame-retardancy, electromagnetic wave absorption, and thermal conduction of ethylene vinyl acetate composites

Abstract

Ball milling introduced graphene oxide onto FeSiCr, followed by radiation reduction to convert it to reduced graphene oxide (rGO). The materials, FeSiCr-rGO and FeSiCr-GO, were blended with Ethylene-Vinyl Acetate (EVA) to create composites. Compared to pure EVA, EVA/FeSiCr-rGO composites showed significant reductions in peak heat release rate (71.3 %), total heat release (33.0 %), and total smoke production (18.3 %). CO and CO2 generation rates decreased, enhancing overall fire resistance. FeSiCr-rGO significantly improved thermal conductivity with minimal impact on mechanical properties compared to FeSiCr-GO. In electromagnetic absorption, FeSiCr-rGO notably enhanced low-frequency and X-band absorption for EVA composites. At 2 mm thickness, EVA/FeSiCr-rGO achieved a maximum reflection loss of -24.8 dB in the X-band, surpassing FeSiCr and FeSiCr-GO. At 3 mm thickness, it effectively absorbed electromagnetic waves in the 6–8 GHz range.