Stretchable nanofibers of polyvinylidenefluoride (PVDF)/thermoplastic polyurethane (TPU) nanocomposite to support piezoelectric response via mechanical elasticity
Abstract:Interest in piezoelectric nanocomposites has been vastly growing in the energy harvesting field. They are applied in wearable electronics, mechanical actuators, and electromechanical membranes. In this research work, nanocomposite membranes of different blend ratios from PVDF and TPU have been synthesized. The PVDF is responsible for piezoelectric performance where it is one of the promising polymeric organic materials containing β-sheets, to convert applied mechanical stress into electric voltage. In addition… Show more
“…7 a,c. Also, the blended PVDF:TPU has better stretching property, which gives us an obvious improvement in the piezoelectric output voltage according to its better face-shear piezoelectricity which is related to the increased possibility of electric dipoles alignment due to the stretching nature of added TPU 68 , 86 , 87 .…”
Section: Resultsmentioning
confidence: 99%
“…A different weights 20–150 g have been thrown from 1 cm height onto the nanofiber system and the output voltages have been measured using the oscilloscope. Figure 1 The schematic of the impulse loading setup with different weights 68 . …”
Section: Methodsmentioning
confidence: 99%
“…The electrodes are wired together and the output voltage is measured with the oscilloscope. Figure 2 The cyclic piezoelectric schematic 68 . Figure 3 ( a ) The stretching piezoelectric setup and ( b ) the sandwiched sample between two stretchable metallic electrodes.…”
Section: Methodsmentioning
confidence: 99%
“…The used nanofibers are composed of pure PVDF nanofibers and PVDF mixed with Thermoplastic polyurethane (TPU) to give more mechanical stretching capabilities. From a recent published work by the authors, the addition of TPU at certain optimum concentration can lead to enhance the piezoelectric sensitivity due to the higher mechanical stretchability that TPU can contribute 68 . Then, different piezoelectric analysis has been operated to show the generated electric voltage under different mechanical excitations including cyclic tension, cyclic normal force, and impulse loading.…”
This paper introduces a new approach of testing piezoelectric nanofibers as antibacterial mat. In this work, both Polyvinylidene fluoride (PVDF) and PVDF embedded with thermoplastic polyurethane nanofibers are synthesized as nanofibers mat via electrospinning technique. Then, such mat is analyzed as piezoelectric material to generate electric voltage under different mechanical excitations. Furthermore, morphological and chemical characteristics have been operated to prove the existence of beta sheets piezoelectricity of the synthesized nanofibers mats. Then, the synthesized nanofibers surfaces have been cyclically stretched and exposed to bacteria specimen. It has been noticed that the generated voltage and the corresponding localized electric field positively affect the growth of bacteria and reduces the formation of K. penomenue samples bacteria colonies. In addition, the effect of both stretching frequency and pulses numbers have been studied on the bacteria count, growth kinetics, and protein leakage. Our contribution here is to introduce an innovative way of the direct impact of the generated electric field from piezoelectric nanofibers on the reduction of bacteria growth, without depending on traditional anti-bacterial nanoparticles. This work can open a new trend of the usability of piezoelectric nanofibers through masks, filters, and wound curing mats within anti-bacterial biological applications.
“…7 a,c. Also, the blended PVDF:TPU has better stretching property, which gives us an obvious improvement in the piezoelectric output voltage according to its better face-shear piezoelectricity which is related to the increased possibility of electric dipoles alignment due to the stretching nature of added TPU 68 , 86 , 87 .…”
Section: Resultsmentioning
confidence: 99%
“…A different weights 20–150 g have been thrown from 1 cm height onto the nanofiber system and the output voltages have been measured using the oscilloscope. Figure 1 The schematic of the impulse loading setup with different weights 68 . …”
Section: Methodsmentioning
confidence: 99%
“…The electrodes are wired together and the output voltage is measured with the oscilloscope. Figure 2 The cyclic piezoelectric schematic 68 . Figure 3 ( a ) The stretching piezoelectric setup and ( b ) the sandwiched sample between two stretchable metallic electrodes.…”
Section: Methodsmentioning
confidence: 99%
“…The used nanofibers are composed of pure PVDF nanofibers and PVDF mixed with Thermoplastic polyurethane (TPU) to give more mechanical stretching capabilities. From a recent published work by the authors, the addition of TPU at certain optimum concentration can lead to enhance the piezoelectric sensitivity due to the higher mechanical stretchability that TPU can contribute 68 . Then, different piezoelectric analysis has been operated to show the generated electric voltage under different mechanical excitations including cyclic tension, cyclic normal force, and impulse loading.…”
This paper introduces a new approach of testing piezoelectric nanofibers as antibacterial mat. In this work, both Polyvinylidene fluoride (PVDF) and PVDF embedded with thermoplastic polyurethane nanofibers are synthesized as nanofibers mat via electrospinning technique. Then, such mat is analyzed as piezoelectric material to generate electric voltage under different mechanical excitations. Furthermore, morphological and chemical characteristics have been operated to prove the existence of beta sheets piezoelectricity of the synthesized nanofibers mats. Then, the synthesized nanofibers surfaces have been cyclically stretched and exposed to bacteria specimen. It has been noticed that the generated voltage and the corresponding localized electric field positively affect the growth of bacteria and reduces the formation of K. penomenue samples bacteria colonies. In addition, the effect of both stretching frequency and pulses numbers have been studied on the bacteria count, growth kinetics, and protein leakage. Our contribution here is to introduce an innovative way of the direct impact of the generated electric field from piezoelectric nanofibers on the reduction of bacteria growth, without depending on traditional anti-bacterial nanoparticles. This work can open a new trend of the usability of piezoelectric nanofibers through masks, filters, and wound curing mats within anti-bacterial biological applications.
“…Besides all these above processes, there were many fabricating methods capable of converting PVDF into a beta phase or two-phase material. [153][154][155][156] Several fabrication techniques such as the doctor blade method, electrospinning, solution casting, spin coating, and 3D…”
Section: Piezoelectric Characteristics Of Pvdfmentioning
There was a fast development of various piezoelectric materials in the past two decades due to their numerous applications. Piezoelectric materials made up of natural quartz crystals were used in ultrasonic detectors in the early days. Later, the modern synthetic piezoelectric materials known as ferroelectric ceramics, such as Lead zirconate titanate (PZT), were developed, which were capable of exhibiting piezoelectricity several times greater than natural crystals. Later, the declination of ceramics began as they contained large amounts of lead content, which was considered harmful to both humans and the environment. Finally, a new era in the history of piezoelectric materials boomed with the outbreak of polymer materials. Polyvinylidene fluoride (PVDF) is a piezoelectric polymer material that has drawn the attention of researchers, from the family of fluoropolymers and has paved a new path in the field of polymer science and technology. PVDF has earned the renown of being an excellent piezoelectric material due to its unique and versatile exhibition of piezoelectric and dielectric properties. Furthermore, PVDF can exhibit incredible thermal stability and mechanical strength with flexible processing and low cost compared with the other piezoelectric crystals and ceramics. This comprehensive review mainly focuses on the evolution of piezoelectric materials from crystals to polymers with their advantages and significant drawbacks. Thus, the main objective of this review is to present a detailed description of PVDF concerning its uniqueness as a piezoelectric material and versatile properties, followed by various advanced fabrication techniques and their impact on doping various nanofillers with respective applications. Though PVDF is renowned for its significant applications such as sensors, actuators, energy harvesting and biomedical devices, a tabular chart has been specially framed in one‐liners which highlights the real‐time experimental outcomes where PVDF can be specified as a futuristic polymer for multifunctional applications. A few reports resulted that with increasing graphite and MWCNT fillers into PVDF film, the EMI shielding effectiveness value rose to 14.64 dB at a frequency of 8‐12 Hz. A few reports resulted that by adding ZnO and BaTiO3, the electrical output increased significantly, which is more suitable as a nanogenerator. After an extensive literature survey, we found that reviews are very limited and restricted to specific applications and properties. This review is an overall brief explanation of enormous research works carried out by various experts and presented in a modest way with pictorial and tabular representation for the convenience of researchers. Finally, this review attempts to provide source material to direct researchers towards a fertile area of research with a better understanding of the fundamentals and advancement of polymer piezoelectric materials.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
