Inverse piezoelectric effect and electrostrictive effect in polarized poly(vinylidene fluoride) films

1975 ◽  
Vol 10 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Mitsumasa Oshiki ◽  
Eiichi Fukada
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Inverse Piezoelectric Effect ◽  
Poly Vinylidene Fluoride ◽  
Electrostrictive Effect

scholarly journals Design Analysis of a Fish-Shaped PVDF Compliance Microgripper

2016 ◽  
Vol 5 (2) ◽  
pp. 67
Author(s):  
Neeta Sahay
Keyword(s):  
Frequency Response ◽  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Design Analysis ◽  
Response Force ◽  
Displacement Analysis ◽  
Inverse Piezoelectric Effect ◽  
Poly Vinylidene Fluoride ◽  
Voltage Relationship

In this study the design and analysis of compliance microgripper made of piezoelectric PVDF (Poly Vinylidene Fluoride) material is presented. The inverse piezoelectric effect has been used in which the required amount of voltage has been applied at specific points at the base of the structure to produce the force at the tip and thereby the necessary deflection for gripping. The simulated results of frequency response, force-voltage relationship and displacement analysis are presented.

Molecular modeling of the piezoelectric effect in the ferroelectric polymer poly(vinylidene fluoride) (PVDF)

2013 ◽  
Vol 19 (9) ◽  
pp. 3591-3602 ◽  
Author(s):  
Vladimir S. Bystrov ◽  
Ekaterina V. Paramonova ◽  
Igor K. Bdikin ◽  
Anna V. Bystrova ◽  
Robert C. Pullar ◽  
...  
Keyword(s):  
Molecular Modeling ◽  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Ferroelectric Polymer ◽  
Poly Vinylidene Fluoride

scholarly journals A Method for Quantitatively Separating the Piezoelectric Component from the as-received "Piezoelectric" Signal

2021 ◽  
Author(s):  
Chaojie Chen ◽  
Shilong Zhao ◽  
Caofeng Pan ◽  
Yunlong Zi ◽  
Fangcheng Wang ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Contact Electrification ◽  
Poly Vinylidene Fluoride ◽  
Implantable Electronics ◽  
The Time Domain ◽  
Electric Signals ◽  
Piezoelectric Devices ◽  
Piezoelectric Performance

Abstract Polymer-based piezoelectric devices are promising for developing future wearable force sensors, nanogenerators, and implantable electronics etc. The electric signals generated by them are often assumed as solely coming from piezoelectric effect. However, triboelectric signals originated from contact electrification between the piezoelectric devices and the contacted objects can produce non-negligible interfacial electron transfer, which is often combined with the piezoelectric signal to give a triboelectric-piezoelectric hybrid output, leading to an exaggerated measured “piezoelectric” signal. Herein, a simple and effective method is proposed for quantitatively identifying and extracting the piezoelectric charge from the hybrid signal. The triboelectric and piezoelectric parts in the hybrid signal generated by a poly(vinylidene fluoride)-based device are clearly differentiated, and their force and charge characteristics in the time domain are identified. This work presents an effective method to elucidate the true piezoelectric performance in practical measurement, which is crucial for evaluating piezoelectric materials fairly and correctly.

Electrocaloric and electrostrictive effect of polar P(VDF–TrFE–CFE) terpolymers

2013 ◽  
Vol 03 (02) ◽  
pp. 1350015 ◽  
Author(s):  
Sheng-Guo Lu ◽  
Hui Xiong ◽  
Aixiang Wei ◽  
Xinyu Li ◽  
Qiming Zhang
Keyword(s):  
Electric Field ◽  
Temperature Change ◽  
Vinylidene Fluoride ◽  
Dielectric Material ◽  
Entropy Change ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Change ◽  
Poly Vinylidene Fluoride ◽  
Electrostrictive Effect ◽  
Rigid Ion Model

The electrocaloric effect (ECE) is the adiabatic temperature change or isothermal entropy change caused by the polarization change of a dielectric material when subjected to a change of external electric field. The electrostrictive effect is a form of elastic deformation of a dielectric induced by an electric field, associated with those components of strain which are independent of reversal field direction. It was found that both the ECE, e.g., adiabatic temperature change, and the electrostrictive strain in poly(vinylidene fluoride–trifluoroethylene–chlorofluoroethylene) (P(VDF–TrFE–CFE)) terpolymers are proportional to the square of the electric field. The adiabatic temperature change ΔT of ECE versus electric field can be illustrated using a modified Belov–Goryaga equation. ΔT is proportional to E2 when E is small. For electrostrictive effect, the rigid-ion model assumes that the anharmonic movement of the ions leads to the quadratic strain–electric field relation. The quotient of electrostrictive coefficient Q over the phenomenological coefficient β is empirically a constant, indicating that the larger the electrostrictive coefficient, the larger the ECE, which opens a new way to find out new electrocaloric materials.

Characteristic Behavior of PVDF-Compliant Structure as an End Effector Using Creo Element/Pro Release 5.0

2020 ◽  
pp. 203-212
Author(s):  
Neeta Sahay ◽  
Subrata Chattopadhyay
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Specific Point ◽  
End Effector ◽  
Compliant Structure ◽  
Characteristic Behavior ◽  
Poly Vinylidene Fluoride ◽  
Opening And Closing ◽  
Area Of Application

The tremendous area of application of microprocessors and microcontrollers has exhausted the demand for polymers as sensors among the fastest growing technologies of the $18 billion sensor market worldwide. This chapter presents the study of characteristic behavior of a compliance structure made of PVDF (Poly Vinylidene Fluoride) material which is acting as an actuator and sensor, too. The inverse piezoelectric nature of PVDF has been used to produce the required amount of force by applying the voltage at a specific point at the base of the structure which is generating the opening and closing of the end effector. The displacement of the tip of the end effector can be sensed by generated voltage of piezoelectric effect of PVDF.

scholarly journals The negative piezoelectric effect of the ferroelectric polymer poly(vinylidene fluoride)

2015 ◽  
Vol 15 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Ilias Katsouras ◽  
Kamal Asadi ◽  
Mengyuan Li ◽  
Tim B. van Driel ◽  
Kasper S. Kjær ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Effect ◽  
Ferroelectric Polymer ◽  
Poly Vinylidene Fluoride

scholarly journals Towards Poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene)-Based Soft Actuators: Films and Electrospun Aligned Nanofiber Mats

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 172
Author(s):  
Riccardo D’Anniballe ◽  
Andrea Zucchelli ◽  
Raffaella Carloni
Keyword(s):  
Vinylidene Fluoride ◽  
Weight Ratio ◽  
Tensile Load ◽  
Mechanical Analysis ◽  
Load Test ◽  
Uniaxial Tensile ◽  
Electrospun Nanofiber ◽  
Poly Vinylidene Fluoride ◽  
Soft Actuators ◽  
Electrostrictive Effect

In the pursuit of designing a linear soft actuator with a high force-to-weight ratio and a stiffening behavior, this paper analyzes the electrostrictive effect of the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) polymer in the form of film and aligned electrospun nanofiber mat. An experimental setup is realized to evaluate the electrostrictive effect of the specimens disjointly from the Maxwell stress. In particular, an uniaxial load test is designed to evaluate the specimens’ forces produced by their axial contraction (i.e., the electrostrictive effect) when an external electric field is applied, while an uniaxial tensile load test is designed to show the specimens’ stiffening properties. This electro-mechanical analysis demonstrates that both the film and the nanofiber mat are electrostrictive, and that the nanofiber mat exhibits a force-to-weight ratio ∼65% higher than the film and, therefore, a larger electrostrictive effect. Moreover, both the film and the nanofiber mat show a stiffening behavior, which is more evident for the nanofiber mat than the film and is proportional to the weight of the material. This study concludes that, thanks to its electro-mechanical properties, the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene), especially in the form of aligned electrospun nanofiber mat, has high potential to be used as electro-active polymer for soft actuators in biomedical and biorobotics applications.

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