Piezoelectric materials have attracted substantial interest in applications such as sensors and actuators. Ferroelectric and piezoelectric polymeric fibers doped with nanoparticles are made for use in nanoscale electronic devices. In this paper, we report on poly (vinylidene fluoride) (PVDF) nanocomposites doped with different ratios of multi-walled carbon nanotube (MWCNT) and Cloisite 30B (OMMT) nanoclay prepared by electrospinning technique. The effect of different ratios of OMMT and MWCNT nanofillers and potential synergistic effect of these fillers on the crystalline structure of PVDF and the performance of resulting piezo-device were studied. Results showed that OMMT increases beta phase crystals and piezoelectric properties of PVDF as compared with MWCNT. Meanwhile, MWCNT decreases impedance and increases dielectric constant of PVDF as compared with OMMT. The acoustic absorption behavior of PVDF/MWCNT/OMMT hybrid nanocomposite was also investigated. It was found that the sound absorption efficiency of PVDF/MWCNT/OMMT hybrid nanocomposites was increased compared with that of pure PVDF fibers and film. No synergistic effect of OMMT and MWCNT on the properties of PVDF was observed.

压电材料已经在诸如传感器和致动器的应用中引起了广泛的兴趣。掺杂有纳米颗粒的铁电和压电聚合物纤维被制成用于纳米级电子设备。在本文中，我们报道了通过电纺丝技术制备的掺有不同比例的多壁碳纳米管（MWCNT）和Cloisite 30B（OMMT）纳米粘土的聚偏二氟乙烯（PVDF）纳米复合材料。研究了不同比例的OMMT和MWCNT纳米填料的影响以及这些填料对PVDF晶体结构的潜在协同作用以及所得压电器件的性能。结果表明，与MWCNT相比，OMMT增加了β相晶体和PVDF的压电性能。同时，与OMMT相比，MWCNT降低了阻抗并增加了PVDF的介电常数。还研究了PVDF / MWCNT / OMMT杂化纳米复合材料的吸声行为。研究发现，与纯PVDF纤维和薄膜相比，PVDF / MWCNT / OMMT杂化纳米复合材料的吸声效率有所提高。没有观察到OMMT和MWCNT对PVDF性能的协同作用。