高压电性静电纺柔性氧化锌/聚偏氟乙烯复合纤维膜

为了获得环保、柔软、透气和高压电性的材料，增加压电材料在纳米发电机，传感器，可穿戴电子器件等方面的应用，采用静电纺丝技术制备出了高压电性的氧化锌/聚偏氟乙烯（ZnO/PVDF）复合纤维膜材料。通过扫描电子显微镜、全反射傅里叶变换红外光谱仪、X射线衍射仪及示波器对压电复合纤维膜的形貌、结构和压电性进行了表征。结果表明：在PVDF基材中加入适量的氧化锌纳米颗粒(ZnO NPs)可在一定程度上提升PVDF纤维膜的结晶度和电活性β晶型含量增加，使PVDF中总的β晶型含量增加；同时，ZnO NPs自身具有压电性，也可进一步提升复合材料的压电性，使复合纤维膜的输出电压显著提高。当ZnO NPs质量分数为30%时，复合膜的输出电压高达60V，与纯PVDF纤维膜的输出电压相比，复合纤维膜的压电性提升了200%。

High piezoelectric flexible electrospunzinc oxide/poly(vinylidene fluoride) composite fibrous membranes

In order to obtain eco-friendly, flexible,permeable and piezoelectric materials and to widenapplicationsthereof innanogenerators, sensors and wearable electronic devices, the high piezoelectric ZnO/PVDF composite fibrous membranes were successfully prepared by electrospinning. The morphology, structure and piezoelectricity ofsamples were characterized by the scanning electron microscope, attenuated total reflectance fourier transform infrared spectroscopy, X-ray diffractionand oscilloscope. The results demonstrate that the addition of appropriate contents of zinc oxide nano-particles (ZnO NPs) in PVDF fiber matrix contributes to improving crystallinity and electroactiveβ cuystal formconcentration of PVDF fiber to some extent,leading to the increase of the total crystal form ofPVDF. Meanwhile, ZnONPs have piezoelectricity, which further enhances the piezoelectric performances of the composites.The output voltage of the ZnO/PVDF composite fibrous membranes are improved dramatically. The output voltage of the composite membrane is up to60V when the content of ZnONPs is 30%, which is increased by 200% in comparison withpure PVDF fibers.