Piezoelectric enhancement of an electrospun AlN-doped P(VDF-TrFE) nanofiber membrane

Jiang, Yang; Xu, Fan; Jiang, Huabei; Wang, Conghuan; Li, Xingjia; Zhang, Xiuli; Zhu, Guodong

doi:10.1039/d1qm00550b

Cited by 20 publications

(15 citation statements)

References 51 publications

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“…Electrospun piezoelectric nanofibers can be easily integrated within several different device platforms to build nanogenerators, environmental and physiological monitors, and voice recognition systems. Some representative examples are reported in Table . ,− Highly dense arrays of PVDF-TrFE nanofibers (Figure a) are used as the pressure sensor, displaying ultrahigh sensitivity to detect pressures as small as 0.1 Pa . Three-dimensional, free-standing architectures of nanofibers (Figure b) show structural flexibility and large sensitive areas, and devices can be built simply by establishing electrical contacts at the ends of aligned fibers.…”

Section: Nanofibers In Energy Harvesting Device Platformsmentioning

confidence: 99%

Enhancement and Function of the Piezoelectric Effect in Polymer Nanofibers

2022

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Conspectus The realization of intelligent, self-powered components and devices exploiting the piezoelectric effect at large scale might greatly contribute to improve our efficiency in using resources, albeit a profound redesign of the materials and architectures used in current electronic systems would be necessary. Piezoelectricity is a property of certain materials to generate an electrical bias in response to a mechanical deformation. This effect enables energy to be harvested from strain and vibration modes, and to sustain the power of actuators, transducers, and sensors in integrated networks, such as those necessary for the Internet of Thing. Polymers, combining structural flexibility with lightweight construction and ease of processing, have been largely used in this framework. In particular, the poly(vinylidene fluoride) [PVDF, (CH 2 CF 2 ) n ] and its copolymers exhibit strong piezoelectric response, are biocompatibile, can endure large strains and can be easily shaped in the form of nanomaterials. Confined geometries, improving crystal orientation and enhancing piezoelectricity enable the fabrication of piezoelectric nanogenerators, which satisfy many important technological requirements, such as conformability, cheap fabrication, self-powering, and operation with low-frequency mechanical inputs (Hz scale). This account reports on piezoelectric polymer nanofibers made by electrospinning. This technique enables the formation of high-aspect-ratio filaments, such as nanowires and nanofibers, through the application of high electric fields (i.e., on the order of hundreds of kV/m) and stretching forces to a polymeric solution. The solution might be charged with functional, organic or inorganic, fillers or dopants. The solution is then fed at a controlled flow rate through a metallic spinneret or forms a bath volume, from which nanofibers are delivered. Fibers are then collected onto metallic surfaces, and upon a change of the collecting geometry, they can form nonwovens, controlled arrays, or isolated features. Nanofibers show unique features, which include their versatility in terms of achievable chemical composition and chemico-physical properties. In addition, electrospinning can be up-scaled for industrial production. Insight into the energy generation mechanism and how the interaction among fibers can be used to enhance the piezoelectric performance are given in this paper, followed by an overview of fiber networks as the active layer in different device geometries for sensing, monitoring, and signal recognition. The use of biodegradable polymers, both natural and synthetic, as critically important building blocks of the roadmap for next-generation piezoelectric devices, is also discussed, with some representative examples. In particular, biodegradable materials have been utilized for applications related to life science, such as the realization of active scaffolds and of electronic devices to be placed in intim...

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Section: Nanofibers In Energy Harvesting Device Platformsmentioning

confidence: 99%

Enhancement and Function of the Piezoelectric Effect in Polymer Nanofibers

2022

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“…However, the strong mechanical properties constrain the application for wearable electronic devices, even if they have a large piezoelectric effect. In contrast, due to their benefits of low density, flexibility, environmental friendliness, and strong biocompatibility, piezoelectric polymers, particularly PVDF and its copolymer trifluoro-ethylene (PVDF-TrFE), are regarded as the most probable options for flexible and wearable electronics [ 34 ].The crystallographic phases of PVDF are α phase, β phase, and γ phase. Most of the PVDF is made up of a nonelectroactive α phase.…”

Section: Introductionmentioning

confidence: 99%

“…According to a recent report from Yuan et al [ 46 ], monoaxial particle-doped fibers from a single-fluid blending electrospinning exhibit a high piezoelectric coefficient and robust electromechanical coupling. The alignment of additional electrical dipoles and the generation of more β phase can be facilitated by nanoparticles contained in PVDF fibers [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Enhancement of Piezoceramic Nanoparticle-Doped PVDF/PCL Core-Sheath Fibers

et al. 2023

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Electrospinning is considered to be an efficient method to prepare piezoelectric thin films because of its ability to transform the phase of the polymers. A core-sheath structure can endow fibers with more functions and properties. In this study, fibers with a core-sheath structure were prepared using polyvinylidene fluoride (PVDF) included with nanoparticles (NPs) as the shell layer and polycaprolactone (PCL) as the core layer. Their mechanical and piezoelectric properties were studied in detail. During the course of the electrospinning process, PVDF was demonstrated to increase the amount of its polar phase, with the help of nanoparticles acting as a nucleating agent to facilitate the change. PCL was chosen as a core material because of its good mechanical properties and its compatibility with PVDF. Transmission electron microscope (TEM) assessments revealed that the fibers have a core-sheath structure, and shell layers were loaded with nanoparticles. Mechanical testing showed that the core layer can significantly improve mechanical properties. The XRD patterns of the core-sheath structure fibers indicated the β phase domain the main component. Piezoelectric testing showed that the doped nanoparticles were able to enhance piezoelectric performances. The increases of mechanical and piezoelectric properties of core-sheath structure fibers provide a feasible application for wearable electronics, which require flexibility and good mechanical properties.

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“…[121,122] Besides those above traditional piezoceramic fillers, some other functional ceramic nanomaterials, such as silicon quantum dots (Si QDs), talc, aluminum nitride (AlN), are employed to improve the piezoelectric properties and provide other functions in PVDF nanofibers. [92,123,124] These studies inspire the next-generation piezoelectric pressure sensors to further develop into biodegradable and multifunctional systems.…”

Section: Introducing Nanofillersmentioning

confidence: 99%

Recent Progress of Wearable Piezoelectric Pressure Sensors Based on Nanofibers, Yarns, and Their Fabrics via Electrospinning

Zhi

Shi

et al. 2022

Adv Materials Technologies

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weight, ultrathinness, high flexibility, and comfortable characteristics, wearable electronics that can realize the detection and quantification of electric signals produced by physiological activities and human motions have attracted worldwide research attention. [1][2][3] These wearable electronics integrated with sensing elements can conformally be attached to clothes, skin, or organs, enabling new human motion detection, different disease recognition and personal healthcare management. From this respect, people are working on the "Internet of Medical Things (IoMTs)," which connects numerous wearable sensors to a communication network center to enable regular or real-time communication between doctors and patients. [4,5] As pressure changes can show deteriorated behavior of specific disease area, different wearable health sensors have considered pressure monitoring. [6] However, the traditionally designed electrogram system is usually attached to the human body, in which the electrodes are connected to the skin or organs through the clips, tapes, or puncture needles. The cumbersome design often leads to the incompatible contact between electrodes and the human body and results in signal distortion or high noise. In addition, these electrodes must be connected to external power sources, rigid circuit boards, and communication components to record electrical signals from the human body. Except for electrograms, wearable pressure sensing systems with the lightweight, ultrathin, and flexible features that detects changes in physical stimuli and converts biomechanical stimuli into recorded signals, which are in conformal contact with skin or organs, can be intended in human motion monitoring and individual medical care. [7,8] Most of physical stimuli are generally produced through the normal activities and physical contact by human body, such as pulse, blood pressure, and skin strain, all of which are important health indicators of the human body. [9,10] Herein, wearable pressure sensing can contribute to low-cost wearable noninvasive solutions to record continuous human body signal of electrophysiological activity.Harvesting energy from human mechanical sources like motion-generated pressure and strains has attracted extensive attention to develop self-powered wearable devices, [11,12] Highly sensitive flexible pressure sensors are extensively investigated for various applications, such as electronic skin, human physiological monitoring, and artificial intelligence. However, traditional fabrication technologies are hard to realize the large-area and mass production of wearable sensing devices. Current trend of miniaturization, systematization, and multifunction has raised the problems of total energy consumption, frequent charging, and reduced usage time. These issues have hindered the progress of wearable sensing electronics. In the light of nanomaterial design, mass production, and facile manufacturing, electrospun piezoelectric pressure sensors offer the best properties of self-powering, breathability, stretcha...

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Piezoelectric enhancement of an electrospun AlN-doped P(VDF-TrFE) nanofiber membrane

Abstract: Piezoelectric materials are well known for their applications in self-powered sensing and mechanical energy harvesting. With the development of Internet of Things and wearable electronics, piezoelectric polymers are attracting more...

Cited by 20 publications

References 51 publications

Enhancement and Function of the Piezoelectric Effect in Polymer Nanofibers

Enhancement and Function of the Piezoelectric Effect in Polymer Nanofibers

Piezoelectric Enhancement of Piezoceramic Nanoparticle-Doped PVDF/PCL Core-Sheath Fibers

Recent Progress of Wearable Piezoelectric Pressure Sensors Based on Nanofibers, Yarns, and Their Fabrics via Electrospinning

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