Nucleation of electro‐active β and γ‐phases in P(VDF−HFP) for manufacturing energy harvesting device and self powered weight measuring device

Abstract

Highly electro‐active P(VDF−HFP)/Cu2+ films having more than 99% electro‐active phase was prepared by a simple solution casting method. We used this electro‐active polymer to make piezoelectric generators (PGs). These PGs can instantly light several LEDs just by repeated finger tapping. Using a bridge rectifier, by repeated finger tapping, capacitors were charged successfully by using these PGs. It is observed that when different people walk over these PGs they produce different voltage signals, indicating that these can be used as weight measuring device and in the field of intelligence. These indicate that there is potential for PGs to be used as self‐powered devices where mechanical vibrations can be utilized. Dielectric property of the polymer is also improved. This fabrication process of PGs is very easy and the cost of production is also very low. In our work, we have used very cheap salt as filler and got a very high amount (99%) of electro‐active phases. Also, we have got a very high piezoelectric output voltage (40 Volts) just by finger tapping on the simple device that we fabricated by using the polymer film.

A comprehensive review on poly(vinylidene fluoride) from a theoretical and multimodal applications perspective

“…[40][41][42][43][44][45][46][47][48] Many applications related to light weight sensors has been tested successfully and weight measuring device. [49][50][51][52] It is seen that PVDF/SGO bi-layer can respond to mois, heat, moisture and light with very much accuracy and repeatability of the results. 53 PVDF/grapheme actuators response time is very fast in comparison to only PVDF actuators.…”

“…(A) Schematic diagram of the weight measuring device and (B) The digital photograph of the device 52 . Reprinted from Asadullah et al 52 © 2022 Society of Plastics Engineers with the permission from Jonn Willey and Sons.…”

“…These polymers can be used in many piezoelectricity based devices in robotics, various medical devices, prosthetic body parts, various acoustic devices, sensors, energy harvesting devices, and so forth 40‐48 . Many applications related to light weight sensors has been tested successfully and weight measuring device 49‐52 . It is seen that PVDF/SGO bi‐layer can respond to mois, heat, moisture and light with very much accuracy and repeatability of the results 53 .…”

“…55 F I G U R E 8 Schematic diagram of an energy harvester. 52 Reprinted from Asadullah et al, 52 © 2022 Society of Plastics Engineers with the permission from John Willey and Sons.…”

“…Haldar has shown that PVDF-HFP, in its electroactive phase can be used to make cost effective, simple to manufacture weight measuring device. 52 Prakriti et al devised a UV sensor based on (PVDF-HFP)/Zn ++ which can be used as a multipurpose device. 61 A sensor was manufactured by Kim et al based on PVDF thin films.…”