Polypyrrole@Reduced graphene oxide@Liquid metal composites for efficient electromagnetic wave absorption

Recently, non-magnetic composites acting as microwave absorbing materials are gaining more attention due to their unique advantages. In this work, polypyrrole@reduced graphene oxide@liquid metal (PGL) composites were successfully prepared through a simple approach as efficient microwave absorbing materials. The impedance matching performance of the composite was accurately adjusted by controlling the amount of graphene oxide (GO) and polypyrrole layer. The optimum PGL composite obtained a reflection loss of −46.81 dB at a low frequency of 2.17 GHz. This method provides a reference path in liquid metal-based non-magnetic microwave absorbing materials.