Ag@MoS2/P(VDF-HFP)电介质复合材料的制备及性能研究

Preparation and Properties of Ag@MoS2/P(VDF-HFP) Dielectric Composite

采用两步水热法制备了高长径比核-壳结构Ag@MoS2纳米线,以P(VDF-HFP)为基体、Ag@MoS2纳米线作为填料,在不同填充量下通过溶液共混和流延法制备了复合材料薄膜。采用SEM、TEM、XRD、XPS等对Ag@MoS2的微观结构、尺寸、化学成分进行表征,并利用SEM和阻抗分析仪对复合材料的微观形貌和介电性能进行表征。结果表明:Ag@MoS2填料在聚合物基体中分散均匀,且两相之间的界面结合效果良好。随着填料含量的增加,复合材料的介电常数逐渐增大,当Ag@MoS2的质量分数为35%时,1 kHz下复合材料的介电常数为67.2,介质损耗因数仅为0.15,且复合材料的介电常数和介质损耗呈现出较弱的频率依赖性。

An Ag@MoS2 nanowire with high aspect ratio and core-shell structure was prepared by two steps hydrothermal method. A composite film with different content of Ag@MoS2 nanowires filler were prepared using P(VDF-HFP) as matrix by solution blending and tape casting method. The microstructure,size, and chemical composition of Ag@MoS2 were characterized by SEM, TEM, XRD and XPS, and the microstructure and dielectric property of the composite were investigated by SEM and impedance analyzer. The results show that the MoS2 filler can well disperse in the polymer matrix, and the two phases show good interfacial bonding effect. With the increase of filler content, the dielectric constant of the composites increases gradually. When the mass fraction of Ag@MoS2 is 35%, the dielectric constant of the composite at 1 kHz is 67.2, and the dielectric loss factor is only 0.15. More importantly, the dielectric constant and dielectric loss of the composite exhibit weak frequency dependence.