Reduced Graphene Oxide Aerogels with Uniformly Self-Assembled\nPolyaniline Nanosheets for Electromagnetic Absorption

Abstract

Reduced\ngraphene oxide (RGO)/polyaniline (PANI) composite aerogels\n(GPAs) with uniformly distributed PANI nanosheets were prepared by\na facile self-assembly way. The fabricated hybrids present a cross-linked\nthree-dimensional (3D) porous network, and RGO sheets were covered\nby PANI sheets with controlled content. The unique architecture efficiently\nreduced agglomeration of RGO and enhanced the conductive loss of the\nmaterial to incident wave. Specifically, the GPA composite with 50\nwt % PANI showed excellent electromagnetic wave absorption capacity;\nthe largest reflection loss (RL) value reached −48 dB with\nfill loading of only 3%, and the qualified bandwidth (RL ≤\n−10 dB) covered the entire Ku band (12–18 GHz). The\nstudy is expected to pave the way to prepare wide qualified bandwidth\nand lightweight graphene-based electromagnetic wave absorption hybrids\nwith controlled microstructure.