高压静电纺丝工艺制备PVDF-ZnO/GR共聚物膜的压电性能研究

Piezoelectric Properties of PVDF-ZnO/GR Copolymer Films Prepared by High Voltage Electrospinning

提出了一种利用高压静电纺丝工艺制备PVDF/ZnO及PVDF/Graphene(以下简称GR)共聚物膜的方法并对其压电性能进行了研究。通过在传统的PVDF溶液中混入氧化锌和石墨烯,制备得到PVDF共聚物膜,对PVDF,PVDF/ZnO,PVDF/GR三种膜进行电镜扫描以表征其表面结构。对三种压电薄膜进行了压电响应对比实验,PVDF,PVDF/ZnO,PVDF/GR三种薄膜的压电响应峰值分别达到16.8 V,29.6 V,21.7 V。PVDF/ZnO压电薄膜对比PVDF压电薄膜的电压峰值提高12.8 V。PVDF/GR压电薄膜对比PVDF压电薄膜的电压峰峰值提高了4.9 V。对三种压电薄膜进行了能量收集实验,PVDF,PVDF/ZnO,PVDF/GR三种薄膜分别令LED灯点亮11.3 s,17 s,14.6 s,输出功率密度为6.79μW/cm^2,19.28μW/cm^2,15.11μW/cm^2。PVDF共聚物膜对比PVDF膜在压电性上有显著提高,可应用于压电能量收集或可穿戴传感器等应用领域。

A method for preparing PVDF/ZnO and PVDF/Graphene copolymer films by high-voltage electrospinning was proposed and its piezoelectric properties were studied. The PVDF copolymer film was prepared by mixing zinc oxide and graphene in a conventional PVDF solution,and the PVDF,PVDF/ZnO,PVDF/GR films were scanned by electron microscopy to characterize the surface structure. The piezoelectric response of PVDF,PVDF/ZnO and PVDF/GR piezoelectric films were compared. The piezoelectric response peaks value of PVDF,PVDF/ZnO and PVDF/GR films were 16.8 V,29.6 V and 21.7 V. The voltage peak value of PVDF/ZnO piezoelectric film compared with PVDF piezoelectric film is increased by 12.8 V. The voltage peak value of PVDF/GR piezoelectric film compared with PVDF piezoelectric film is increased by 4.9 V. The energy harvest experiments were carried out on three kinds of piezoelectric films. The PVDF,PVDF/ZnO and PVDF/GR films illuminate the LED lamps for 11.3 s,17 s and 14.6 s,and the output power density is 6.79 μW/cm^2,19.28 μW/cm^2,15.11 μW/cm^2. The PVDF copolymer film has a significant improvement in piezoelectricity compared to the PVDF film,and is suitable for applications such as piezoelectric energy harvesting or wearable sensors.