Hydrophone based on 3D printed polypropylene (PP) piezoelectret

Palitó, Thamyres Tâmulla Cavalcante; Assagra, Y. A. O.; Altafim, Ruy Alberto Pisani; Carmo, J. Pereira do; Altafim, Ruy Alberto Corrêa

doi:10.1049/el.2018.7287

Cited by 15 publications

(3 citation statements)

References 14 publications

(16 reference statements)

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“…After metallisation and charging with a voltage of 4.5 kV, the ABS ferroelectrets show a piezoelectric d 33 coefficient of 100 pC/N, which is stable up to about 85°C. Later, the technique was extended to produce two‐layer polypropylene ferroelectrets with chess pattern cavities, which can be used as hydrophone to detect ultrasonic signals [30].…”

Section: Ferroelectret Materialsmentioning

confidence: 99%

Ferroelectrets: Recent developments

Qiu

Bian

Liu

et al. 2022

IET Nanodielectrics

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Ferroelectrets (also called piezoelectrets) are relatively young members in the family of piezo‐, pyro‐ and ferroelectric materials. They exhibit ferroic behaviour phenomenologically undistinguishable from that of traditional ferroelectrics, although the materials per se are essentially non‐polar space‐charge electrets with artificial macroscopic dipoles (i.e. internally charged cavities). Since ferroelectrets not only represent a scientific curiosity but also have great application potential, they have attracted tremendous attention from science and industry. The research and development of ferroelectrets has witnessed significant progress in the past few years. New ferroelectrets with large transverse piezoelectric activity, biodegradable ferroelectrets as well as 3‐D printed ferroelectrets are reported. Charging methods of high efficiency are proposed based on better understanding of the physico‐chemical processes during charging. New insights into the piezoelectricity of ferroelectrets are provided. The development of ferroelectret‐based piezoelectric‐magnetic multimodal transducer films opens up new avenues for the research of ferroelectrets. Particularly, more and more novel applications of ferroelectrets in flexible pressure sensors, health monitoring, energy harvesting, air‐coupled ultrasonic non‐destructive testing etc. are reported. Here, these exciting recent advancements in the field of ferroelectret research are reviewed and discussed.

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Section: Ferroelectret Materialsmentioning

confidence: 99%

Ferroelectrets: Recent developments

Qiu

Bian

Liu

et al. 2022

IET Nanodielectrics

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“…As a significant part of sensors or devices, piezoelectric materials have been investigated for several decades [1]. Most of the piezoelectric materials with high piezoelectric coefficients are rigid or undegradable [2, 3]. Many piezoelectric ceramic and polymer materials without modification cannot meet the requirements of the flexible wearable or implantable degradable devices [4].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and mechanical properties of polycaprolactone/nano-barium titanate piezoelectric composites

Liu

Xianyun²,

Wang

et al. 2021

Plastics, Rubber and Composites

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Dielectric property is a crucial characteristic of electronic materials and piezoelectric materials. In this study, the piezoelectric composites of polycaprolactone mixed with nano-barium titanate were fabricated. The nano-barium titanate was modified by biosurfactant lecithin to disperse well in the polycaprolactone matrix. The dielectric property of this composite was supplied. In particular, the dielectric constant of the composites was calculated by different theoretic models. The experimental data confirmed that the rotating ellipsoidal theoretical model is suitable for polycaprolactone/nano-barium titanate composites. The composites have weak piezoelectric properties because of the nano-barium titanate addition. It is noteworthy that the flexural strength is improved by two times. The mechanism of the improvement was analysed. The composite has potential applications in the field of flexible and degradable wearable electronics.

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“…Models describing the piezoelectric properties of layered structures have shown that the presence of at least one dielectric layer with a relatively high elasticity (low value of Young's modulus Y, which should be on the level of 10 5 Pa or lower) is one of Energies 2020, 13, 2884 2 of 11 the fundamental requirements [11][12][13]. This mechanical demand may be obtained by specific polymer processing, such as 3D printing [14], foaming, stretching, thermoforming, and others [15]. Structures made of different electret materials, such as polypropylene (PP) [16], cross-linked PP-XPP [17], poly(tetrafluoroethylene) (PTFE) [18], fluoroethylenepropylene (FEP) [19], poly(ethylene tetraphtalate) (PET) [20], poly(ethylene naphthalate) (PEN) [21], or cyclo-olefins polymers [22], have been investigated for many years.…”

Section: Introductionmentioning

confidence: 99%

Bubble Electret-Elastomer Piezoelectric Transducer

Kacprzyk

Mirkowska

2020

Energies

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Ferroelectret-based piezoelectric transducers are, nowadays, commonly used in energy harvesting applications due to their high piezoelectric activity. Unfortunately, the processing properties of such materials are limited, and new solutions are sought. This paper presents a new solution of a piezoelectric transducer containing electret bubbles immersed in an elastomer matrix. Application of a gas-filled dielectric bubble as the fundamental cell of the piezo-active structure is discussed. A simplified model of the structure, containing electret thin-wall bubbles and elastomer dielectric filling, was applied to determine the value of the piezoelectric coefficient, d33. An exemplary structure containing piezo-active bubbles, made of an electret material, immersed in an elastomer filling is presented. The influence of the mechanical and electrical properties of particular components on the structure piezoelectric properties are experimentally examined and confirmed. The quasi-static method was used to measure the piezoelectric coefficient, d33. The separation of requirements related to the mechanical and electrical properties of the transducer is discussed.

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Hydrophone based on 3D printed polypropylene (PP) piezoelectret

Cited by 15 publications

References 14 publications

Ferroelectrets: Recent developments

Ferroelectrets: Recent developments

Dielectric and mechanical properties of polycaprolactone/nano-barium titanate piezoelectric composites

Bubble Electret-Elastomer Piezoelectric Transducer

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