Synergistic effects of Ti\(_{3}\)C\(_{2}\)T\(_{x}\) MXene on the structural and dielectric properties of blend-based dielectrics

The PVDF/PMMA-Ti₃C₂Tx MXene composite (PMC) films are processed via the solution casting method. The various phases (α, β) of PVDF have been identified through analysis using an X-ray diffractometer and Fourier transform infrared spectroscopy instruments. The maximum percentage β phase (%) obtained was 73.15%, which corresponds to a 10.0 wt% composite film. The structural analysis revealed that the Ti3C2Tx nanoparticles are immiscibly distributed throughout the blend matrix, allowing the electrical conductivity and dielectric constant values to noticeably increase at constant frequency. The highest dielectric loss of 0.077 and the highest dielectric constant (εr) of 191.5 (at 100 Hz) were observed in the nanocomposites (NCs) film having 20 wt% Ti3C2Tx MXene. The relative permittivity rises with increasing filler content because of high electrostatics and the interfacial polarization between the neat blend (‒CH2‒CF2 dipole) and filler. The percolation behavior is displayed by the conducting composite, and the percolation threshold has been shown to be more than 20 wt% MXene. The present study offers a novel perspective on the enhanced structural and dielectric properties of the composite system.