VB_(2)/SiO_(2)/PVDF复合材料压电薄膜的性能研究

Piezoelectric Properties of VB_(2)/SiO_(2)/PVDF Composite Film

介绍了维生素B_(2)/二氧化硅/聚偏氟乙烯(VB_(2)/SiO_(2)/PVDF)复合材料薄膜的制备工艺和压电性能。研究发现,在PVDF溶液中添加VB_(2)粉末和纳米SiO_(2)颗粒,通过蒸发结晶制备成膜,采用高倍率单轴拉伸和高压极化的方法可增加复合材料中β相的含量,从而提高复合材料的压电性能。研究中分别使用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅里叶红外光谱仪(FTIR)等方法对VB_(2)/SiO_(2)/PVDF薄膜进行测试,并基于悬臂梁振动平台对压电复合薄膜的性能进行了测试,分析了VB_(2)和SiO_(2)不同含量组合和悬臂梁振幅对开路电压的影响。结果表明,VB_(2)和SiO_(2)的含量同时为1%和1%时,复合材料薄膜的压电性能最优,其在1000μ应变下可产生1.52 V的峰-峰值电压。

This work focused on the fabrication and the piezoelectric properties of the vitamin B_(2)/silicon dioxide/polyvinylidene fluoride(VB_(2)/SiO_(2)/PVDF)composite.It was found that the addition of vitamin B_(2)powder and nano silicon dioxide in the PVDF solution could improve the piezoelectricity of the PVDF film.The film was highly stretched uniaxially and polarized at a high voltage to increase the amount ofβ-phase in the composite.In the study,VB_(2)/SiO_(2)/PVDF composite films were analyzed by scanning electron microscope(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),and a cantilever beam system was used to test the piezoelectric properties by investigating the performance of the piezoelectric composite films with various filler contents and at various vibration amplitude.The results show that the composite film with 1%VB_(2)and 1%SiO_(2)could produce the best piezoelectricity and the open-circuit peak-to-peak voltage generated is 1.52 V at a strain of 1000μ.