Electromechanical Characterization of Polyvinylidene Fluoride (PVDF) Films in Biaxial Extension

2011 ◽  
Author(s):  
Sandhya Mohan ◽  
C. Lakshmana Rao
Keyword(s):  
Polyvinylidene Fluoride ◽  
Biaxial Loading ◽  
Experimental Investigations ◽  
Loading Conditions ◽  
Anisotropic Behavior ◽  
Sensors And Actuators ◽  
Static Tests ◽  
Electromechanical Characterization ◽  
Uniaxial And Biaxial Loading

Polyvinylidene Flouride (PVDF) is a piezoelectric material which finds numerous applications as sensors and actuators. Significant developments have taken place in characterizing the mechanical and the electromechanical response of PVDF. The characterization of the response of PVDF reported in literature was conducted under uniaxial loading. This paper discusses the experimental investigations carried out to observe the response of PVDF films under uniaxial and biaxial loading conditions. These thin films have been subjected to static as well as dynamic mechanical loading. The response of the film under theses loading conditions was observed through the stress strain curves obtained for the different tests conducted. The anisotropic behavior of the material was also studied by conducting uniaxial static tests along two mutually perpendicular directions.

Microstress distribution in graphite fibre/epoxy composites containing an elastomeric interphase: response to uniaxial and biaxial loading conditions

Composites ◽  
1995 ◽  
Vol 26 (4) ◽  
pp. 269-280 ◽  
Author(s):  
Steven D. Gardner ◽  
Charles U. Pittman ◽  
Tao C. Chang ◽  
Boon Y. Low ◽  
Robert M. Hackett
Keyword(s):  
Biaxial Loading ◽  
Epoxy Composites ◽  
Loading Conditions ◽  
Graphite Fibre ◽  
Uniaxial And Biaxial Loading

Electromechanical Characterization of a Biosensitive and Electroactive Polymer Membrane

2006 ◽  
Vol 514-516 ◽  
pp. 910-914
Author(s):  
Paulo Inácio ◽  
José N. Marat-Mendes ◽  
C.J. Dias
Keyword(s):  
Polyvinylidene Fluoride ◽  
Quartz Crystal ◽  
Biological Properties ◽  
Electroactive Polymer ◽  
Piezoelectric Polymer ◽  
Quartz Crystal Microbalances ◽  
Acoustic Wave Devices ◽  
New System ◽  
Electromechanical Characterization

Most piezoelectric biosensors normally use crystals, as in the quartz crystal microbalances or surface acoustic wave devices. A new system is described in which piezoelectric polymer films (made of polyvinylidene fluoride, PVDF, and Immobilon, a porous type of PVDF) are used to produce a mass sensitive oscillatory resonant device. Recent results demonstrated that this system successfully detects the binding between bovine IgG (immunoglobulin G) and anti bovine IgG. In order to improve the performance of the biosensor the electromechanical behaviour of such film-membrane is being studied. Miniaturization is also a desirable trend which will be pursued. Thus reports on the dependence on the electrical, mechanical and biological properties with the size of the film will be presented.

scholarly journals Characterization of Electrospun PVDF Fibres for Sensing and Actuation

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 501 ◽  
Author(s):  
Federico Fabriani ◽  
Krishna Chytanya ◽  
Iucci Giovanna ◽  
Giulia Lanzara
Keyword(s):  
Polyvinylidene Fluoride ◽  
Piezoelectric Response ◽  
Light Weight ◽  
Sensors And Actuators ◽  
Intelligent Materials ◽  
Non Invasive ◽  
Β Phase ◽  
Piezoelectric Polymer

One of the major challenges for the realization of ultra-light weight and intelligent materials with advanced sensing/actuation capabilities, is related to, among other things, the integration in the material of non-invasive but indeed highly performing sensors and actuators. The reduction in scale, weight, and flexibility of the sensing devices represents a critical aspect to reach this goal. These unique properties are here reached by using flexible piezoelectric polymer (Polyvinylidene fluoride, PVDF) nanofibers as sensing elements. The nanofibers, that in this case study are randomly distributed, form an ultra-thin nanostructured porous mat that was deposited through a far field electrospinning approach. The process was optimized to obtain a dominant β phase in the polymer to enhance the piezoelectric response. The electrospun fibers were characterized at different scales: at the molecular level to understand the β phase content (FTIR spectroscopy), as well as at the macroscopic level to investigate the resulting ferroelectric and electromechanical response The results presented in this paper show the great capability of the nanostructured porous mat to work as ultra-light weight dynamic sensing system. Its scalable size and intrinsic properties make it an ideal solution for the development of advanced intelligent materials that can work at different length-scales.

Preparation and Characterization of Polyvinylidene Fluoride/ZrO2-TiO2 Optical Film with Wide Band Gap and High Refractive Index

2013 ◽  
Vol 28 (6) ◽  
pp. 671-676 ◽  
Author(s):  
Yu-Qing ZHANG ◽  
Li-Li ZHAO ◽  
Shi-Long XU ◽  
Chao ZHANG ◽  
Xiao-Ying CHEN ◽  
...  
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
Polyvinylidene Fluoride ◽  
Wide Band ◽  
High Refractive Index ◽  
Wide Band Gap ◽  
Optical Film
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