Electrospun PVDF-based piezoelectric nanofibers: materials, structures, and applications

Zhang, Mengdi; Liu, Chengkun; Li, Boyu; Shen, Yutong; Wang, Hao; Ji, Keyu; Mao, Xue; Wei, Lubin; Sun, Runjun; Zhou, Fan

doi:10.1039/d2na00773h

Cited by 37 publications

(19 citation statements)

References 134 publications

(159 reference statements)

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“…The high surface charge density of KNN nanoparticles facilitates the electrostatic attraction/repulsion between the -CH 2 /-CF 2 dipoles during the electrospinning process, favouring the formation of the β-phase [26]. Additionally, the incorporation of graphene, which possesses excellent conductivity, enhances the content of β-phase crystals and charge transfer ability in the electrospun fibers [41] Moreover, the functional groups in graphene interact with the -CF 2 /-CH 2 groups in PVDF, promoting the crystallization of the β-phase in the nanocomposite [42].…”

Section: Experimental Results Of X-ray Diffraction (Xrd) and Crystal ...mentioning

confidence: 99%

Design and application of a flexible nano cardiac sound sensor based on P(VDF-TrFE)/KNN/GR composite piezoelectric film for heart disease diagnosis

Luo,

Xiao,

Liu

et al. 2023

Nanotechnology

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The paper proposes a flexible micro-nano composite piezoelectric thin film. This flexible piezoelectric film is fabricated through electrospinning process, utilizing a combination of 12wt% P(VDF-TrFE), 8wt% KNN nanoparticles, and 0.5wt% GR. Under cyclic loading, the composite film demonstrates a remarkable increase in open-circuit voltage and short-circuit current, achieving values of 36.1 V and 163.7 uA, respectively. These values are 5.8 times and 3.6 times higher than those observed in the pure P(VDF-TrFE) film. The integration of this piezoelectric film into a wearable flexible heartbeat sensor, coupled with the RepMLP classification model, facilitates heartbeat acquisition and real-time automated diagnosis. After training on a dataset of 2000 heartbeat samples, the system exhibits an accuracy nearing 99%. This research substantially enhances the output performance of the piezoelectric film, offering a novel and valuable solution for the application of flexible piezoelectric films in physiological signal detection

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Section: Experimental Results Of X-ray Diffraction (Xrd) and Crystal ...mentioning

confidence: 99%

Design and application of a flexible nano cardiac sound sensor based on P(VDF-TrFE)/KNN/GR composite piezoelectric film for heart disease diagnosis

Luo,

Xiao,

Liu

et al. 2023

Nanotechnology

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“…Among them, PVDF is the most commonly used substrate material for electrostatic spinning and has received numerous reports. [59][60][61] PVDF is an organic polymer piezoelectric material with both flexibility and maximum piezoelectric coefficient used to prepare flexible piezoelectric sensors, which can compensate the deficiencies of traditional inorganic piezoelectric materials used in wearable flexible electronic devices. 62 PVDF contains five crystalline phases, of which the βphase is the polar phase that contributes the most to the piezoelectric effect of PVDF.…”

Section: Electrospun Materials and Structural Design Of Sensitive Layersmentioning

confidence: 99%

Review—Electrostatic Spinning for Manufacturing Sensitive Layers of Flexible Sensors and Their Structural Design

Yin,

Wang,

et al. 2024

J. Electrochem. Soc.

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Electrostatic spinning technology is widely used in the manufacturing of flexible sensors. It is a mature and reliable method to fabricate nanofibers with tailorable fiber diameter surface microstructure like porosities and specific surface areas. Based on these properties, the electrically conductive composite nanofiber mats achieved by functionalizing nanofibers with active conductive nanomaterials are used as a sensitive layer for flexible sensors with tunable sensing performance. However, it is crucial to select suitable materials and optimal electrospinning technology, as well as design of the sensitive layer structure, for tuning the mechano-electrical performance of flexible sensors. This paper first reviews the current methods for the fabrication of flexible sensors with a focus on preparation method based electrospinning technology. Then, we introduce in detail the types and properties of common substrate materials and conductive fillers used to make sensor sensitive layers, with emphasis on the design of sensitive layer structures for the properties of the materials themselves. Finally, there is a summary of improvements and derivations based on the traditional electrospinning technologies that have been reported in recent years. It is hoped that this review will provide both references and inspiration for researchers in the field of flexible sensors.

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“…[16,17] Moreover, the fibrous structure benefits piezoelectric performance because dipoles are subject to alignment within finite fiber dimensions at small scales with high aspect ratios. [18][19][20] Current strategies for improving the piezoelectric output of the PVDF fibers mainly focus on increasing the 𝛽 active phase, such as adding salts, [21] compositing with nanofillers, [22,23] and thermal annealing. [24] Alternatively, fiber morphological regulation is another promising route for enhancing the electromechanical conversion efficiency.…”

Section: Doi: 101002/smll202303285mentioning

confidence: 99%

Simulation Guided Coaxial Electrospinning of Polyvinylidene Fluoride Hollow Fibers with Tailored Piezoelectric Performance

Shao

Zhang

Song

et al. 2023

Small

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Electrospun polyvinylidene fluoride (PVDF) piezoelectric fibers have high potential applicability in mechanical energy harvesting and self‐powered sensing owing to their high electromechanical coupling capabilities. Strategies for tailoring fiber morphology have been the primary focus for realizing enhanced piezoelectric output. However, the relationship between piezoelectric performance and fiber structure remains unclear. This study fabricates PVDF hollow fibers through coaxial electrospinning, whose wall thickness can be tuned by changing the internal solution concentration. Simulation analysis demonstrates an increased effective deformation of the hollow fiber as enlarging inner diameter, resulting in enhanced piezoelectric output, which is in excellent agreement with the experimental results. This study is the first to unravel the influence mechanism of morphology regulation of a PVDF hollow fiber on its piezoelectric performance from both simulation and experimental aspects. The optimal PVDF hollow fiber piezoelectric energy harvester (PEH) delivers a piezoelectric output voltage of 32.6 V, ≈3 times that of the solid PVDF fiber PEH. Furthermore, the electrical output of hollow fiber PEH can be stably stored in secondary energy storage systems to power microelectronics. This study highlights an efficient approach for reconciling the simulation and tailoring the fiber PEH morphology for enhanced performances for future self‐powered systems.

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Electrospun PVDF-based piezoelectric nanofibers: materials, structures, and applications

Abstract: Polyvinylidene fluoride (PVDF) has been considered as promising piezoelectric materials for advanced sensing and energy storage systems because of their high dielectric constant and good electroactive response. Electrospinning is a...

Cited by 37 publications

References 134 publications

Design and application of a flexible nano cardiac sound sensor based on P(VDF-TrFE)/KNN/GR composite piezoelectric film for heart disease diagnosis

Design and application of a flexible nano cardiac sound sensor based on P(VDF-TrFE)/KNN/GR composite piezoelectric film for heart disease diagnosis

Review—Electrostatic Spinning for Manufacturing Sensitive Layers of Flexible Sensors and Their Structural Design

Simulation Guided Coaxial Electrospinning of Polyvinylidene Fluoride Hollow Fibers with Tailored Piezoelectric Performance

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