摘要
To enhance the piezoelectric performance of piezoelectric polymer thin films in general,hybrid polyvinylidene difluoride(PVDF)and nanosized barium titanate(BaTiO_(3))piezoelectric films were prepared and their piezoelectric performance examined.The hybrid nanofibers were fabricated via electrospinning at an external voltage of 15 kV.The nonwoven fabrics were collected using a roller collection device,and their morphological structures were analyzed via scanning electron microscopy.The crystal structures of these piezoelectric films were characterized via micro-Raman spectroscopy.β-phase of the composite nanofiber membrane almost increased to twice owing to the addition of BaTiO_(3)nanoparticles.Compared with pure,electrospun PVDF piezoelectric film,the piezoelectric characteristics of the hybrid piezoelectric films were considerably enhanced because of the additional BaTiO_(3)nanoparticles.The maximum instantaneous open-circuit voltage of the hybrid PVDF-BaTiO_(3)nanofibers film can be high up to 80 V.The high-performance hybrid piezoelectric films exhibited notable prospects for applications in wearable electronic textiles.
为提高压电聚合物薄膜的压电性能,研制了聚偏氟乙烯(PVDF)和钛酸钡(BaTiO_(3))纳米颗粒复合压电薄膜,并对其压电性能进行测试.利用静电纺丝工艺,在15 kV外置电压条件下制备复合纳米纤维,并使用滚筒收集装置收集纳米纤维薄膜.利用扫描电子显微镜表征纳米纤维结构形貌,采用拉曼光谱测量复合压电薄膜的晶体结构.结果表明,BaTiO_(3)纳米颗粒的加入可使复合纳米纤维膜的β相增加近2倍.与纯静电纺丝PVDF压电薄膜相比,添加BaTiO_(3)纳米颗粒的复合压电薄膜压电性显著提高.PVDF和BaTiO_(3)复合纳米纤维薄膜的最大瞬时开路电压可高达80 V.
基金
The National Natural Science Foundation of China(No.52375563)
the Science and Technology on Avionics Integration Laboratory(No.201913069001,20200055069001).
