The effect of graphene-coating material (G-Fe) on the dynamic mechanical characteristics of magnetorheological elastomer (MRE)

Magnetorheological elastomers (MREs) have attracted significant attention as potential intelligent materials for vibration absorption and damping in tank engines. To increase the force of contact between the matrix and the particles, a novel graphene-coating material was created. The graphene-coated iron (G-Fe) used in this study was synthesized at a high temperature and then combined with natural rubber to create MRE samples. The magnetic resonance effect of MRE samples was examined using a rheometer fitted with a magnetic field. The data indicate that by adding G-Fe at a concentration of 6% to MREs, their magnetorheological (MR) effect is dramatically boosted, while its Payne effect is significantly lowered. This is probably because adding G-Fe can reduce the initial modulus as the particles can move more easily in the magnetic field. However, the high levels of G-Fe may adversely affect the movement of particles in the matrix. The aging properties of the MRE samples were tested, and the results indicated that the surface layer of G-Fe is graphene. It has excellent compatibility with rubber and has little effect on the thermal oxygen aging of MREs compared with Carbonyl Iron Powder (CIP). Therefore, doping with G-Fe improves the thermal oxygen aging performance of MREs. [ABSTRACT FROM AUTHOR]