# Solid-state-processing of d_PVDF

## TL;DR

This paper introduces a scalable solid-state processing method to produce fully piezoelectric PVDF films at temperatures below melting, enabling industrial-scale manufacturing of piezoelectric polymer films with high performance.

## Contribution

It presents a novel single-step solid-state processing technique to produce piezoelectric PVDF films, overcoming previous processing limitations.

## Key findings

- Produced PVDF films with piezoelectric charge coefficients comparable to biaxially stretched PVDF.
- Demonstrated a simple, scalable process suitable for industrial production.
- Achieved high thermal stability and piezoelectric response in processed films.

## Abstract

Poly(vinylidene fluoride) (PVDF) has long been regarded as an ideal piezoelectric plastic because it exhibits a large piezoelectric response and a high thermal stability. However, the realization of piezoelectric PVDF elements has proven to be problematic, amongst others, due to the lack of industrially-scalable methods to process PVDF into the appropriate polar crystalline forms. Here, we show that fully piezoelectric PVDF films can be produced via a single-step process that exploits the fact that PVDF can be molded at temperatures below its melting temperature, i.e. via solid-state-processing. We demonstrate that we thereby produce d_PVDF, the piezoelectric charge coefficient of which is comparable to that of biaxially stretched d_PVDF. We expect that the simplicity and scalability of solid-state processing combined with the excellent piezoelectric properties of our PVDF structures will provide new opportunities for this commodity polymer and will open a range of possibilities for future, large-scale, industrial production of plastic piezoelectric films

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Source: https://tomesphere.com/paper/1706.08068