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(BaTiO3)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,BaTiO3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BaTiO3纳米颗粒的复合压电薄膜压电性显著提高.PVDF和BaTiO3复合纳米纤维薄膜的最大瞬时开路电压可高达80 V.
Electrical power generator from electrospun hybrid PVDF-BaTiO3 nanofiber membranes
To enhance the piezoelectric performance of piezoelectric polymer thin films in general,hybrid polyvinylidene difluoride(PVDF)and nanosized barium titanate(BaTiO3)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 BaTiO3 nanoparticles.Compared with pure,electrospun PVDF piezoelectric film,the piezoelectric characteristics of the hybrid piezoelectric films were considerably enhanced because of the additional BaTiO3 nanoparticles.The maximum instantaneous open-circuit voltage of the hybrid PVDF-BaTiO3 nanofibers film can be high up to 80 V.The high-performance hybrid piezoelectric films exhibited notable prospects for applications in wearable electronic textiles.
electrospinningpolyvinylidene difluoride(PVDF)nanofiberbarium titanate(BaTiO3)piezoelectric film
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