Piezoelectric properties of <scp>PVDF‐conjugated</scp> polymer nanofibers

Trevino, Julio E.; Mohan, Swati; Salinas, Alexandra; Cueva, E.G.; Lozano, Karen

doi:10.1002/app.50665

Cited by 28 publications

(10 citation statements)

References 29 publications

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“…The proposed design uses polyvinylidene fluoride (PVDF) as the piezoelectric material. This polymeric piezoelectric material has lower piezoelectric coefficients compared to traditional piezoceramics or single-crystal piezoelectric materials [20], but allows for greater flexibility and lightweight that can better allow it to bend with the motion of the lead wire [21,22]. The design was modelled using finite element analysis in COMSOL Multiphysics ® v. 6.0 (COMSOL AB, Stockholm, Sweden) and verified with experimental testing.…”

Section: Introductionmentioning

confidence: 99%

PVDF Energy Harvester for Prolonging the Battery Life of Cardiac Pacemakers

Behdinan

Moradi‐Dastjerdi

2022

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Patients who have an implantable cardiac pacemaker that survive beyond the operational life of the device require replacement surgeries that increase healthcare costs and may possibly introduce post-operative complications such as infection. In this paper, we propose a piezoelectric energy harvester design for powering pacemakers to extend their operational life. The design uses a thin strip of piezoelectric PVDF that captures energy from bending of the lead wire. We assemble a prototype to validate a finite element model, and then use the finite element model to characterize the power output of the design based on a cantilever beam loading condition, where displacement at the cantilever tip simulated heart motion. The voltage output from the prototype was compared to the output from the finite element simulation and the finite element simulation provided a good estimate of the voltage output. Further finite element analysis showed that for a 10 cm long section of the proposed design, a 9.1 mm tip displacement provided a power output of 1 μW and a voltage output of ±1.4 V during each cycle.

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Section: Introductionmentioning

confidence: 99%

PVDF Energy Harvester for Prolonging the Battery Life of Cardiac Pacemakers

Behdinan

Moradi‐Dastjerdi

2022

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“…FS uses centrifugal force to prepare nanofibers, , and its production rate, at the lab scale, is about 1 g/min compared to 0.1 g/h. Commonly experienced in electrospinning, the FS output is 600 times. , …”

Section: Introductionmentioning

confidence: 99%

“…Commonly experienced in electrospinning, the FS output is 600 times. 42,43 In this study, we prepared a TENG system composed fully of nanofiber layers, where the prepared PVDF nanofiber membranes were being used as the tribonegative layers. PVDF is an interesting polymer, which possesses the polymorphic nature, α, β, γ, δ, and ε phases; among these, the α phase is nonpolar while the β phase has a strong polar response.…”

Section: Introductionmentioning

confidence: 99%

“…PVDF is an interesting polymer, which possesses the polymorphic nature, α, β, γ, δ, and ε phases; among these, the α phase is nonpolar while the β phase has a strong polar response. 16 The β phase is induced more effectively over other phases when the continuous and homogeneous PVDF NFs were stretched out from polymer solution by centrifugal force, 43 and this yields electroactive characteristics, especially high polarizability and dielectric properties that promote a significant electrical output of the TENGs. 44 Compared to other positive polymers, TPU has been studied very little in the application of nanogenerator fields.…”

Section: Introductionmentioning

confidence: 99%

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Nanofiber-Based Substrate for a Triboelectric Nanogenerator: High-Performance Flexible Energy Fiber Mats

Abir

Sadaf

Saha

et al. 2021

ACS Appl. Mater. Interfaces

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Flexible and stretchable triboelectric nanogenerators (TENGs) are the next-generation systems for wearable and portable electronics. In this study, we have demonstrated an all nanofiber-based TENG for energy harvesting and biomechanical sensing applications. The TENG was prepared using the Forcespinning (FS) method to produce poly(vinylidene fluoride) (PVDF) and thermoplastic polyurethane (TPU) nanofiber (NF) membranes. The TPU nanofiber membranes were interfaced with a homogeneously sputtered gold nanofilm. The experimental characterization of the PVDF-TPU/Au NF-TENG revealed that surface interfaced with dispersed gold in a TPU fiber membrane produced a maximum open-circuit voltage of 254 V and a short-circuit current of 86 μA output at a 240 bpm load frequency, which was, respectively, 112 and 87% greater than bare PVDF-TPU NF-based TENG. All systems were composed of an active contact surface area of 3.2 × 2.5 cm2. Furthermore, the TENG was able to light up 75 LEDs (1.5 V of each) by the hand-tapping motion. The resistive load and capacitor test results exemplified a TENG offering a simple and high-performance self-chargeable device. Furthermore, we have tested the TENG’s response for biomechanical movements at different frequencies, suggesting the TENG’s potential to be also used as a cost-effective self-powered flexible body motion sensor.

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“…During the last years, poly(vinylidene fluoride) (PVDF) [4,5] and its copolymers [6][7][8] have been the most used polymers in electronic devices or renewable energies. PVDF has good mechanical properties, such as flexibility and low cost.…”

Section: Introductionmentioning

confidence: 99%

Phase Transitions in Poly(vinylidene fluoride)/Polymethylene-Based Diblock Copolymers and Blends

et al. 2021

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The crystallization and morphology of two linear diblock copolymers based on polymethylene (PM) and poly(vinylidene fluoride) (PVDF) with compositions PM23-b-PVDF77 and PM38-b-PVDF62 (where the subscripts indicate the relative compositions in wt%) were compared with blends of neat components with identical compositions. The samples were studied by SAXS (Small Angle X-ray Scattering), WAXS (Wide Angle X-ray Scattering), PLOM (Polarized Light Optical Microscopy), TEM (Transmission Electron Microscopy), DSC (Differential Scanning Calorimetry), BDS (broadband dielectric spectroscopy), and FTIR (Fourier Transform Infrared Spectroscopy). The results showed that the blends are immiscible, while the diblock copolymers are miscible in the melt state (or very weakly segregated). The PVDF component crystallization was studied in detail. It was found that the polymorphic structure of PVDF was a strong function of its environment. The number of polymorphs and their amount depended on whether it was on its own as a homopolymer, as a block component in the diblock copolymers or as an immiscible phase in the blends. The cooling rate in non-isothermal crystallization or the crystallization temperature in isothermal tests also induced different polymorphic compositions in the PVDF crystals. As a result, we were able to produce samples with exclusive ferroelectric phases at specific preparation conditions, while others with mixtures of paraelectric and ferroelectric phases.

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Piezoelectric properties of PVDF‐conjugated polymer nanofibers

Cited by 28 publications

References 29 publications

PVDF Energy Harvester for Prolonging the Battery Life of Cardiac Pacemakers

PVDF Energy Harvester for Prolonging the Battery Life of Cardiac Pacemakers

Nanofiber-Based Substrate for a Triboelectric Nanogenerator: High-Performance Flexible Energy Fiber Mats

Phase Transitions in Poly(vinylidene fluoride)/Polymethylene-Based Diblock Copolymers and Blends

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