Fabrication of poly (vinylidene fluoride-trifluoroethylene) – Zinc oxide based piezoelectric pressure sensor

Karumuthil, Subash Cherumannil; Singh, Kulwant; Valiyaneerilakkal, Uvais; Akhtar, Jamil; Varghese, Soney

doi:10.1016/j.sna.2019.111677

Cited by 29 publications

(7 citation statements)

References 15 publications

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“…This generates a potential with positive amplitude between the two electrodes of the device. When the deforming force is released, the dipoles regain their initial orientation and generate a small potential with negative amplitude 4,25 . Since the E60 does not contain nHA, the low voltage generated could be due to tribo‐electricity instead of piezoelectricity.…”

Section: Resultsmentioning

confidence: 99%

“…PZT is reported as a ceramic material with high piezoelectricity, finding applications in sensors and transducers. ZnO filled poly(vinylidene fluoride‐trifluoroethylene) piezoelectric polymer nanocomposites have been reported as efficient pressure sensors, having a sensitivity of 0.175 μV (psi) –1 25,26 . Piezoelectric and dielectric properties of hydroxyapatite are topics of great interest now due to its biocompatible nature.…”

Section: Introductionmentioning

confidence: 99%

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Nanohydroxyapatite embedded blends of ethylene‐co‐vinyl acetate and millable polyurethane as piezoelectric materials: dielectric, viscoelastic and mechanical features

Shafeeq

Karumuthil

Varghese

et al. 2020

Polymer International

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We report the piezoelectric, dielectric and dynamic mechanical features of nanohydroxyapatite (nHA) embedded ethylene-covinyl acetate (EVA)/millable polyurethane (MPU) elastomer blends. The EVA/MPU/nHA systems were prepared by two-roll milling followed by compression moulding. The piezoelectric features were probed by dynamic contact electrostatic force microscopy (EFM).The neat EVA/MPU blend was not found to exhibit ferroelectric properties. However, upon incorporation of nHA, butterfly loops of EFM amplitude signals as well as complementary hysteresis curves were obtained, confirming the introduction of ferropiezoelectric properties. The ferro-piezoelectric features were found to be improved with an increase in nHA loading which recorded highest signals for 8 parts per hundred parts of rubber (phr) loaded composites. The fabricated devices generated a peak voltage of 4.02 V and 4.89 V respectively with 6 phr and 8 phr nHA loaded composites. Electrical properties such as dielectric constant, volume resistivity and loss factor as well as dynamic mechanical properties were examined. The viscoelastic features of the systems support the reinforcing feature with filler loading. TEM analysis of the composites indicated a uniform distribution of filler particles in the blend matrix, complementing the observed ferro-piezoelectric, dielectric and dynamic mechanical properties. The simultaneous modulation of piezoelectric and viscoelastic properties is a preferred feature for fast-responsive dielectric elastomers for their applications in various piezoelectric devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanohydroxyapatite embedded blends of ethylene‐co‐vinyl acetate and millable polyurethane as piezoelectric materials: dielectric, viscoelastic and mechanical features

Shafeeq

Karumuthil

Varghese

et al. 2020

Polymer International

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“…For example, Varghese et al used P (VDF-TrFE)/1% ZnO piezoelectric polymer nanocomposites as pressure sensing materials, and the sensitivity of the sensor with optimized sensing material concentration can reach 0.025 mV kPa À1 . 71 In addition to filler doping, the polymer matrix modification, involving chemical modification or grafting of functional groups onto the PVDF polymer matrix as well as the composites of the PVDF matrix, and other organic polymer materials through solution or melt blending were adopted to improve its intrinsic properties. Apart from PVDF and its copolymers, materials such as PMMA, PEO, PAN, PDMS, and synthetic polymers can also serve as polymer matrices for composite piezoelectric materials.…”

Section: Piezoelectric Materialsmentioning

confidence: 99%

Functional dielectric materials for high-performance solid-state batteries

Wang,

Liang

et al. 2024

Mater. Chem. Front.

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“…To achieve these outstanding performance characteristics, the dielectric layer of an ideal pressure sensor should be sufficiently soft, flexible, and compressible, as well as capable of rapid recovery. Typically, polymer materials such as polydimethylsiloxane (PDMS) [45,59,60], sponge [61][62][63], nylon fiber [64,65], polystyrene [66][67][68], and P(VDF-TrFE) [69][70][71] have been used in pressure sensing as dielectric layers. PDMS has been the most frequently investigated material for fabricating capacitive pressure sensors due to its excellent flexibility, biocompatibility, ecological friendliness, machinability, and reliability, making it ideal for electronic skin applications.…”

Section: Introductionmentioning

confidence: 99%

A flexible and highly sensitive capacitive pressure sensor with fast response based on a hierarchically micro-structured PDMS dielectric layer

Zhang

Qin³

et al. 2023

J. Micromech. Microeng.

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Flexible high-sensitivity pressure sensors have seen rapid growth in the last few years in applications like electronic skin, smart wearables and medical health monitoring. In this work, we develop a high-flexibility capacitive pressure sensor design based on a hierarchical, micro-pyramid-structured dielectric layer of polydimethanes (PDMS). The goal of this design is to achieve low-hysteresis capacitive pressure sensors with increased sensitivity and reduced response time. To optimize the performance of the proposed pressure sensor, we designed and fabricated several different micro-pyramid structures on the silicon template using standard photolithography and anisotropic etching. As a result, the pressure sensor with a hierarchical micro-pyramid structure achieved through graphic transfer has the best performance, with a sensitivity of up to 2.64 kPa-1 ( 0-2 kPa), a response time of 45 ms, a low limit of detection (LoD) of < 8 Pa, and high stability over at least 1200 loading cycles. As a result of these remarkable performance features, the pressure sensor proposed can be effectively utilized for the detection of physiological signals as well as mechanical pressure which can be widely used in the fields of motion sensing, health monitoring and intelligent robots.

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Fabrication of poly (vinylidene fluoride-trifluoroethylene) – Zinc oxide based piezoelectric pressure sensor

Cited by 29 publications

References 15 publications

Nanohydroxyapatite embedded blends of ethylene‐co‐vinyl acetate and millable polyurethane as piezoelectric materials: dielectric, viscoelastic and mechanical features

Nanohydroxyapatite embedded blends of ethylene‐co‐vinyl acetate and millable polyurethane as piezoelectric materials: dielectric, viscoelastic and mechanical features

Functional dielectric materials for high-performance solid-state batteries

A flexible and highly sensitive capacitive pressure sensor with fast response based on a hierarchically micro-structured PDMS dielectric layer

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