Effect of polarization switching on piezoelectric and dielectric performance of electrospun nanofabrics of poly(vinylidene fluoride)/Ca–Al LDH nanocomposite,Journal of Applied Polymer Science

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Effect of polarization switching on piezoelectric and dielectric performance of electrospun nanofabrics of poly(vinylidene fluoride)/Ca–Al LDH nanocomposite
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-11-08 , DOI: 10.1002/app.48697
C. Shamitha ₁ , Arunjunairaj Mahendran ₂ , S. Anandhan ₁

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At present, highly flexible, durable, and lightweight piezoelectric nanogenerators with high‐power density and energy conversion efficiency are of great interest. The present study reports a new synthetic route for Ca–Al layered double hydroxide (LDH) nanosheets and incorporation of these two‐dimensional nanosheets as filler material into poly(vinylidene fluoride) (PVDF) to produce composite nanofabrics by electrospinning. The polymorphism, crystallinity, and the interaction between PVDF and LDH were studied by Fourier transform infrared spectroscopy, X‐ray diffraction, and differential scanning calorimetry techniques. The synergetic effect of PVDF–LDH interaction and in situ stretching due to electrospinning facilitates the nucleation of electroactive β phase up to 82.79%, which makes it a suitable material for piezoelectric‐based nanogenerators. The piezoelectric performance of PVDF/Ca–Al LDH composite nanofabrics was demonstrated by hand slapping and frequency‐dependent mechanical vibration mode, which delivered a maximum open circuit output voltage of 4.1 and 5.72 V, respectively. Moreover, the composite nanofabrics exhibited a high dielectric constant and low dielectric loss due to superior interfacial polarization at low‐frequency region with LDH loading, promising its potential applications in electronic devices. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48697.

中文翻译：

极化转换对聚偏二氟乙烯/ Ca-Al LDH纳米复合材料电纺纳米纤维的压电和介电性能的影响

当前，具有高功率密度和能量转换效率的高度柔性，耐用且轻便的压电纳米发电机备受关注。本研究报告了钙铝层状双氢氧化物（LDH）纳米片的新合成路线，并将这些二维纳米片作为填充材料掺入聚偏二氟乙烯（PVDF）中，以通过电纺丝生产复合纳米织物。通过傅立叶变换红外光谱，X射线衍射和差示扫描量热技术研究了多态性，结晶度以及PVDF与LDH之间的相互作用。PVDF-LDH相互作用和原位协同作用由于电纺丝而产生的拉伸可促进高达82.79％的电活性β相成核，这使其成为压电纳米发电机的合适材料。PVDF / Ca-Al LDH复合纳米织物的压电性能通过手动拍打和频率相关的机械振动模式进行了演示，分别提供了4.1和5.72 V的最大开路输出电压。此外，由于在具有LDH负载的低频区域具有优异的界面极化作用，复合纳米纤维具有较高的介电常数和较低的介电损耗，从而有望在电子设备中得到潜在的应用。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2019，137，48697。

更新日期：2020-02-18

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