Improving Dielectric Properties of Poly(Vinylidene Fluoride) Composites by Employing Hybrid Particles of Two‐Dimensional Ti3C2Tx MXene and Zero‐Dimensional Ag Nanoparticles for Flexible Dielectric Application

ABSTRACT For organic film capacitors, it is important to develop flexible materials with excellent dielectric performance. Adding inorganic fillers can enhance the dielectric properties of the polymer, but the fillers are easy to agglomerate. The distribution of fillers can be improved by hybrid fillers with different dimensions. In this work, PVDF (Poly(vinylidene fluoride)) composites were prepared by hybrid of two‐dimensional Ti 3 C 2 T x MXene and zero‐dimensional Ag nanoparticles. The microstructural analysis revealed excellent interfacial compatibility between the filler and the polymer matrix. The PVDF composites showed good surface smoothness (less than 1/10000) and significant dielectric response. In particular, composites loaded with hybrid particles of 2 phr (parts per hundred rubber) Ti 3 C 2 T x MXene and 5 phr Ag exhibited a dielectric constant of 16.73, whereas maintaining a relatively low loss tangent (< 0.032). This can be attributed to the enhanced interfacial polarization between the filler and polymer matrix, resulting in the formation of micro‐dipoles. More importantly, PVDF composites exhibited stable dielectric properties within the temperature range from room temperature to 160°C, demonstrating excellent temperature stability of dielectric parameters. In summary, designing composites with superior dielectric properties by incorporating hybrid particles of different dimensions is a practical approach.