Exploring a new material MXene‐based polymer composite with high‐dielectric constant and low‐dielectric loss is important because of their potential applications in modern electronics and power systems. The two‐dimensional layered Ti3C2Tx(MXene)/linear low‐density polyethylene (LLDPE) composite have been fabricated via the solution casting method in the weight ratio of 1 to 10 of Ti3C2Txto the total weight of the polymer matrix. The formation of Ti3C2Tx filled LLDPE composite is revealed by the X‐ray diffraction, Field Emission Scanning Electron Microscope (FESEM), Fourier‐transform infrared, differential scanning calorimetry, and thermogravimetric analysis investigations. The room temperature transport behavior of the composites was studied by impedance spectroscopy technique within the frequency range of 5 Hz–5 MHz. The composites show significantly improved real dielectric permittivity of and low‐dielectric dissipation loss of the composite (maximum ε' = 9.35 × 103 with tan δ = 0.48 at 5 Hz at 25°C) at 5 phr of Ti3C2Tx loading. This work gives an auspicious idea to build polymer films with improved dielectric permittivity and low‐loss tangent for potential application in flexible electronic materials.
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