Improved dielectric and mechanical properties in Ti3C2Tx MXene-MoS2/Methyl vinyl silicone rubber composites as flexible dielectric materials

Abstract

Flexible dielectric composites have gained extensive attention in the field of electronics. However, its application is limited by the low dielectric permittivity. Here, we report a way for fabricating Ti3C2Tx MXene-MoS2 hybrid fillers/Methyl vinyl silicone rubber (MVQ) composites with high dielectric permittivity. The properties of the composites were investigated systematically. The Ti3C2Tx MXene-MoS2 hybrid fillers were distributed uniformly in the MVQ matrix. The composite with 2.2 wt% Ti3C2Tx MXene-MoS2 hybrid fillers showed a high dielectric permittivity of 7.35 at 103 Hz, while the loss tangent was only 0.00133. The enhanced dielectric properties can be due to the improved specific surface area and enhanced conductivity of the Ti3C2Tx MXene-MoS2 hybrid fillers, resulting in stronger interfacial polarization. Besides, the composites displayed excellent mechanical properties, with high tensile strength of 0.496 MPa and elongation at break of 342%, while the elastic module was lower than 0.456 MPa. Thus, by adding a small amount of Ti3C2Tx MXene-MoS2 hybrid fillers, the uniqueness and practicability of the Ti3C2Tx MXene-MoS2/MVQ composites used in electronic equipment were proved. This work provides a way for the excellent properties of MVQ composites which can be applied to the field of dielectric elastomer.