Preparation of a Piezoelectric PVDF Sensor via Electrospinning
Loading...
Date
2020-08
Authors
Turdakyn, Nursultan
Medeubayev, Alisher
Abay, Ingkar
Adair, Desmond
Kalimuldina, Gulnur
Journal Title
Journal ISSN
Volume Title
Publisher
The 8th International Conference on Nanomaterials and Advanced Energy Storage Systems; Nazarbayev University; National Laboratory Astana; Institute of Batteries
Abstract
Due to growth in robotics and automation in recent years, tactile sensors, which are designed to detect
various information by physical contact, have gained much importance in the development of biomedicine,
social assistance and industry. Piezoelectric tactile sensors fabricated from polyvinylidene difluoride (PVDF)
are used for sensing vibrations because of their high sensitivity, mechanical flexibility, multi-technology
compatibility, stability, and cheaper cost [1]. Generally, piezoelectric materials produce an electrical charge on
the surface when stress is applied. Among the polymorphs of PVDF, only the β-phase exhibits piezoelectric
properties. As electrospinning involves both mechanical stretching and poling, which facilitate the formation
of β-phase, it is the most suitable method to increase the voltage output from a PVDF film [2-3]. In this study,
we prepared an electrospun samples from 10-20 wt.% PVDF dissolved in different volume ratios of
DMF/acetone and DMF/THF. The suitable solvent and wt.% of PVDF to obtain uniform and high β-phase
content fibers were studied.
The analysis of the introduced design of the sensor as two layers of the electrode in between of PVDF
was performed using COMSOL Multiphysics software. The simulation study helps to optimize the
development of sensors and allow their adjustments by comparing the analytical results of different changes of
the output signal, eigenfrequency, vibration amplitude and applied pressure to the film.
Description
Keywords
polyvinylidene difluoride, PVDF, Research Subject Categories::TECHNOLOGY