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

Flexible dielectric composites have gained extensive attention in the field of electronics. However, its ap-plication 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 en-hanced 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.(c) 2023 Elsevier B.V. All rights reserved.