Ref.: MCoMeim05-003

Effect of magnetic ionic liquid in composite involving graphene and epoxy resin on the electromagnetic microwave absorptivity

Apresentador: Jean Carlos Carelo

Autores (Instituição): Carelo, J.C.(Universidade Federal do Rio de Janeiro); Soares, B.G.(Universidade Federal do Rio de Janeiro); Schmitz, D.P.(Universidade Federal do Rio de Janeiro); Henriques, R.R.(Universidade Federal do Rio de Janeiro); Da Silva, J.M.(Universidade Federal do Rio de Janeiro);

Resumo:
Epoxy resin (ER) composites with graphene (GnP) and the metallic liquid (MIL) P66614[FeCl4] in different proportions were created to evaluate the absorption properties of microwave electromagnetic waves. In this work, combinations of ER/GnP.MIL with 10/10, 10/20, 20/10 and 20/20 phr of GnP/MIL were investigated in the X-band (8.2–12.4 GHz) and in the Ku-band (12.4–18 GHz), and the double role of the cure property of ER with MIL P66614[FeCl4] was also evaluated. The combined system ER/GnP.P66614[FeCl4] 20/20 phr and 10/10 phr presented minimum frequency attenuation values RL below -10 dB in the Ku-band. The ER/GnP.P66614[FeCl4] 20/20 combination resulted in a minimum value of -17.11 dB at 14.58 GHz. The highest attenuation was presented by the ER/GnP.MIL 10/10 combination, with a minimum value of -26.45 dB at 14.78 GHz. The combinations ER/GnP.MIL 10/20 phr and ER/GnP.MIL 20/10 phr presented minimum RL values above -10 dB, indicating that synergistic properties and uniform distribution achieve attenuation efficiency, both for the X-band and Ku-band. The results of this work show the mechanisms of combinations that enhance the microwave absorption application.