In this work, a novel nanoparticle ((MoS_2-BT)@ (PDA+PEI)) was constructed through two-dimensional molybdenum disulfide (MoS₂) and zero-dimensional barium titanate (BT) via in-situ polymerization and co-modification of polydopamine (PDA) and polyethylenimine (PEI). Then the nanofillers were dispersed in the Polyarylene ether nitrile (PEN) matrix by film casting to obtain PEN/(MoS₂-BT)@ (PDA+PEI) nanocomposite dielectric films. Subsequently, the latter were subjected to chemical crosslinking at high temperature to obtain CPEN/(MoS₂-BT)@ (PDA+PEI) nanocomposites. The effects of filler content on the properties of PEN matrix composite films were investigated. The results indicate excellent compatibility between (MoS₂-BT)@ (PDA+PEI) and the PEN matrix due to the introduction of an organic modification layer, resulting in overall good performance of nanocomposite films, including good thermal stability with a glass transition temperature (T_g) exceeding 240 °C after chemical crosslinking. The dielectric constant of CPEN nanocomposites containing 40 wt% of the hybrid nanoparticles is 20.2 and the dielectric loss is 0.032 at 1 kHz, the dielectric constant-temperature coefficient of all CPEN nanocomposites is less than 6 × 10⁻⁴ °C⁻¹ at the temperature range of 25–220 °C. In short, the incorporation of (MoS₂-BT)@ (PDA+PEI) effectively enhances the thermal, mechanical, and dielectric properties of PEN-based nanocomposites.

在这项工作中，我们通过二维二硫化钼（MoS2）和零维钛酸钡（BT）通过原位聚合和共聚构建了一种新型纳米粒子（（MoS2-BT）@（PDA+PEI _））_。聚多巴胺（PDA）和聚乙烯亚胺（PEI）的改性。然后通过流延法将纳米填料分散在聚亚芳基醚腈(PEN)基体中，得到PEN/(MoS ₂ -BT)@(PDA+PEI)纳米复合介电薄膜。随后，后者在高温下进行化学交联，得到CPEN/(MoS ₂ -BT)@(PDA+PEI)纳米复合材料。研究了填料含量对PEN基复合薄膜性能的影响。结果表明，由于引入了有机改性层， (MoS _{2 -BT)@ (PDA+PEI) 与 PEN 基体之间具有优异的相容性，从而使纳米复合薄膜具有良好的整体性能}，包括良好的热稳定性和玻璃化转变温度化学交联后( T _g )超过240℃。含有40 wt%杂化纳米粒子的CPEN纳米复合材料的介电常数为20.2，1 kHz时介电损耗为0.032，所有CPEN纳米复合材料在1 kHz时的介电常数-温度系数均小于6 × 10 -4 ^° C ^-1温度范围为 25–220 °C。简而言之，(MoS ₂ -BT)@ (PDA+PEI) 的掺入有效增强了 PEN 基纳米复合材料的热性能、机械性能和介电性能。