Excellent dielectric properties are essential for electromechanical applications of dielectric elastomer. This work confirms that acrylic resin elastomer (AE)-based percolative composites using MXene (Ti₃C₂T_x) nanosheets modified with PANI (referred to as PANI-Ti₃C₂T_x) as conductive fillers exhibit improved dielectric performances. Ti₃C₂T_x/AE and PANI-Ti₃C₂T_x/AE composites with different filler contents were prepared, and their percolation threshold are 6.01 vol% and 6.43 vol%, respectively. The dielectric constant of 6.39 vol% PANI-Ti₃C₂T_x/AE is 298 at 100 Hz, which 1.67 times that of 5.98 vol% Ti₃C₂T_x/AE composites (178), and is 85 times that of the pure AE matrix (3.5). Moreover, the dielectric loss of 6.39 vol% PANI-Ti₃C₂T_x/AE composite still maintains at a low level (0.29 at 100 Hz), which is lower than that of 5.98 vol% Ti₃C₂T_x/AE composite (0.55 at 100 Hz). We suppose that the improved dielectric constant of PANI-Ti₃C₂T_x/AE composites is attributed to the enhanced micro capacitors effect and Maxwell-Wagner-Sillars effect.

优异的介电性能对于介电弹性体的机电应用至关重要。这项工作证实，使用经 PANI（称为 PANI-Ti ₃ C ₂ T _x）改性的MXene (Ti ₃ C ₂ T _x ) 纳米片作为导电填料的基于丙烯酸树脂弹性体 (AE) 的渗透复合材料表现出改善的介电性能。Ti ₃ C ₂ T _x /AE 和 PANI-Ti ₃ C ₂ T _x制备了不同填料含量的 /AE 复合材料，其渗透阈值分别为 6.01 vol% 和 6.43 vol%。6.39 vol% PANI-Ti ₃ C ₂ T _x /AE的介电常数在 100 Hz 时为 298，是 5.98 vol% Ti ₃ C ₂ T _x /AE 复合材料 (178) 的1.67 倍，是 85 倍纯 AE 矩阵 (3.5)。此外，6.39 vol% PANI-Ti ₃ C ₂ T _x /AE 复合材料的介电损耗仍保持在较低水平（0.29 at 100 Hz），低于 5.98 vol% Ti ₃ C ₂ T _x/AE 复合（100 Hz 时为 0.55）。我们假设PANI-Ti ₃ C ₂ T _x /AE 复合材料的介电常数提高归因于增强的微电容器效应和Maxwell-Wagner-Sillars 效应。