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.

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 Piezoelectric Response in Hybrid Micropillar Arrays of Poly(Vinylidene Fluoride) and Reduced Graphene Oxide

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1065 ◽  
Author(s):  
Igor O. Pariy ◽  
Anna A. Ivanova ◽  
Vladimir V. Shvartsman ◽  
Doru C. Lupascu ◽  
Gleb B. Sukhorukov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Response Force ◽  
Force Microscopy ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
Micropillar Arrays

This study was dedicated to the investigation of poly(vinylidene fluoride) (PVDF) micropillar arrays obtained by soft lithography followed by phase inversion at a low temperature. Reduced graphene oxide (rGO) was incorporated into the PVDF as a nucleating filler. The piezoelectric properties of the PVDF-rGO composite micropillars were explored via piezo-response force microscopy (PFM). Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) showed that α, β, and γ phases co-existed in all studied samples, with a predominance of the γ phase. The piezoresponse force microscopy (PFM) data provided the local piezoelectric response of the PVDF micropillars, which exhibited a temperature-induced downward dipole orientation in the pristine PVDF micropillars. The addition of rGO into the PVDF matrix resulted in a change in the preferred polarization direction, and the piezo-response phase angle changed from −120° to 20°–40°. The pristine PVDF and PVDF loaded with 0.1 wt % of rGO after low-temperature quenching were found to possess a piezoelectric response of 86 and 87 pm/V respectively, which are significantly higher than the |d33eff| in the case of imprinted PVDF 64 pm/V. Thus, the addition of rGO significantly affected the domain orientation (polarization) while quenching increased the piezoelectric response.

Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

2020 ◽  
Vol 91 (3) ◽  
pp. 31301
Author(s):  
Nabil Chakhchaoui ◽  
Rida Farhan ◽  
Meriem Boutaldat ◽  
Marwane Rouway ◽  
Adil Eddiai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Research Work ◽  
Research Area ◽  
Interfacial Interaction ◽  
Tetraethyl Orthosilicate ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanofillers ◽  
The Impact ◽  
Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

Sign in / Sign up

Export Citation Format

Share Document