Performance of Piezoelectric Power Generation of Multilayered Poly(vinylidene fluoride) under High Mechanical Strain
Performance of Piezoelectric Power Generation of Multilayered Poly(vinylidene fluoride) under High Mechanical Strain
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高机械应变下多层聚偏二氟乙烯的压电发电性能
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Okamura
中科院分区：
文献类型：
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作者：
T. Nakajima;K. Okaya;Kanako Ohta;T. Furukawa;S. Okamura
在这项研究中，我们考察了一种压电聚合物在发电中的有效使用，基于聚合物的高稳性、高柔韧性和易成型性。理论计算阐明了具有大弹性应变的聚合物的压电性。实验结果表明，多层结构的聚偏氟乙烯(PVDF)薄膜具有与PVDF层数成正比的压电性能，200次轧制的PVDF薄膜的表观D33为7.1nC/N。产生的电荷作为外加应力的函数呈线性增加。作为实际应用，我们设计了一个带有杠杆的机械系统，用于对嵌入的PVDF薄膜施加较大的脚步导数应力。介绍了该系统的发电性能和在较大负载电容器情况下的充电特性。
In this study, we examine the effective usage of a piezoelectric polymer for electric power generation on the basis of polymeric features such as high robustness, high flexibility, and easy formability. Theoretical calculation elucidates the potential of piezoelectric generation of the polymer with a large elastic strain. It is confirmed by the experimental results that the multilayered structure of the rolled poly(vinylidene fluoride) (PVDF) films enhances the performance of piezoelectric generation in proportion to the number of the PVDF layers and shows an apparent d33 of 7.1 nC/N for the film rolled 200 times. The generated charge as a function of the applied stress shows a linear increase. As a practical usage, we design the mechanical system equipped with a lever for applying a large foot-step-derived stress to embedded PVDF films. The performance of electric power generation using the system and the charging characteristics with the relatively large load capacitor are presented.