Dielectric barrier discharges in multi-layer polymer ferroelectrets

Altafim, Ruy Alberto Corrêa; Basso, Heitor Cury; Qiu, Xunlin; Wirges, Werner; Gerhard, Reimund; Jenninger, W.; Wagner, Joachim

doi:10.1109/ceidp.2009.5377827

Cited by 6 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…harvesting, and actuations, which are among the key procedures of various conditions such as industrial systems and bio-mimic robotics [1][2][3]. Among various electromechanical coupling effects and mechanisms, electromagnet, triboelectricity, electret, piezoelectricity and flexoelectricity contribute on different conditions due to their advantages and restrictions [1][2][3][4][5][6][7][8]. Among these effects and materials, stretchable electrets are expected as energy converting-active materials because they 'hold' net charges quasi-permanently, and hence output high electromechanical coupling efficiencies [9] with ultra-high deformation range.…”

Section: Introductionmentioning

confidence: 99%

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

Tian,

Li,

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

Electrical and mechanical energy converts around the nature, and electromechanical coupling effect is applied in various conditions such as mechanical sensing, electrical actuation, and self-powering. During the energy type conversion, electromechanical parameters are among the key issues, such as enlarging the sensitivity and range of mechanical sensing, and energy harvesting efficiency. In this work, a mechanical manipulated approach with stretchable electret is proposed to continuously manipulate the electromechanical parameters. An electromechanical coupling demonstration with pre-stretched electret films and non-contact electrodes are applied, verifying high and regulable electromechanical coupling parameters, and it is advantaged from large deformable and overload permissible capability. This mechanical manipulation approach proposes a new possibility on simplifying the structural and mechanical design of various electromechanical devices, and further enhancing the general applicability with certain geometry and material with ultra-high and tunable electromechanical coupling parameters.

show abstract

Section: Introductionmentioning

confidence: 99%

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

Tian,

Li,

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…The voids of latter structures possess charges of opposite sign trapped at opposing inner air/polymer interfaces which can be regarded as oriented micrometer-size dipoles. When subjected to mechanical or electrical stimulation, the dipole moments of such structures change strongly due to the soft air-filled phase in an otherwise cellular polymer framework [10][11][12] which can be 'engineered' by processing [13][14][15] or assembling of suitable polymer materials [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

High performance fluorinated polyethylene propylene ferroelectrets with an air-filled parallel-tunnel structure

Seggern

Sessler

et al. 2020

Smart Mater. Struct.

View full text Add to dashboard Cite

Fluorinated polyethylene propylene (FEP) ferroelectrets with an air-filled parallel-tunnel structure and regularly distributed bipolar space charges can stimulate integration of ferroelectrets in transducers due to their unique piezoelectric and mechanical properties. Such FEP ferroelectret films exhibit not only large longitudinal piezoelectric activity but also a strong transverse piezoelectric effect which allows for application in flexible transducers either working in 33 mode or in 31 mode. In this article, the transducer relevant properties of FEP ferroelectret films have been characterized. The experimental results show that the directly measurable, quasi-static piezoelectric d 33 -and g 31 -coefficients of the FEP films reach up to 4700 pC N -1 and 4.3 Vm N -1 , respectively, and dynamic values in the frequency range from 10 to 100 Hz are 2600-1500 pC N -1 and 1.2-0.78 Vm N -1 , respectively. No significant reduction of d 33 -coefficient is observed at strains up to 2.1%, showing a high elasticity of the film. Both isothermal decay of d 33 -coefficient and short circuit thermally stimulated discharge (TSD) current spectra show that the ferroelectric FEP films exhibit excellent thermal stability. After 14-day of storage in an atmosphere with a relative humidity of 99%, 75% of the initial piezoelectric d 33 -coefficient was still retained. Also a mechanical test with 1.6 million cycles does not harm the piezoelectric coefficients indicating that air-filled parallel-tunnel FEP ferroelectret films are promising candidates for a variety of flexible transducer applications.

show abstract

“…The voids with the lowest critical field determine the critical field of the film (minimum field needed for the film to become electromechanically active). When the applied field is larger than this minimum, the charge density of the film (and as a result its piezoelectric coefficient d 33 ) increases linearly with the field [3] up to an equilibrium field where no more charges can be forced inside the material [4,5]. It has been shown that the equilibrium field is about two times the critical field of the film [4].…”

Section: Introductionmentioning

confidence: 99%

Cellular polypropylene electromechanical properties: exploring the nonlinear region

Sgardelis

Pozzi

2018

J Theor Appl Phys

View full text Add to dashboard Cite

Many studies have been conducted in the last decades on cellular polypropylene (Cell-PP) films. Most of them focus on the optimisation of the material for sensor applications. Processed under Gas Diffusion Expansion (GDE), Cell-PP films show high piezoelectric activity and low stiffness/density, properties that make them ideal for sensors. GDE increases the height and decreases the length over height ratio (aspect ratio) of individual voids within the material. This change in void morphology, and eventually stiffness, results in a nonlinear piezoelectric response of these materials. In this study, a Cell-PP sample was tested under static, quasi-static and low-frequency compressive stress. The main aim is to evaluate its mechanical and piezoelectric properties in the nonlinear region of its response over strain. The load-deflection curves as well as the piezoelectric responses were obtained for stresses up to 270 kPa (engineering strain close to 0.26). It is shown that both the magnitude of the initial load and the strain rate have a critical effect on the creep/stress relaxation of the film and eventually on its piezoelectric response. Finally, it is shown that under dynamic conditions, and for the same engineering strain region, it is more relevant to present the piezoelectric response, in terms of strain rather than stress.

show abstract

Dielectric barrier discharges in multi-layer polymer ferroelectrets

Cited by 6 publications

References 9 publications

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

A mechanical manipulated electromechanical coupling design with stretchable electret film: mechanical sensing, energy harvesting, and actuation

High performance fluorinated polyethylene propylene ferroelectrets with an air-filled parallel-tunnel structure

Cellular polypropylene electromechanical properties: exploring the nonlinear region

Contact Info

Product

Resources

About