Study on the piezoelectric properties of PVDF-EtP nanofiber membranes and its application in pressure sensors

Acta Physica Sinica, Journal Year: 2025, Volume and Issue: 74(7), P. 0 - 0

Published: Jan. 1, 2025

In recent years, polyvinylidene fluoride (PVDF)-based nanofiber membranes have gained significant attention as key materials for applications in sensors, energy harvesters, and flexible electronics due to their excellent piezoelectric properties. However, the performance of PVDF is still limited by intrinsic structure material characteristics. Therefore, this study investigates effect filler doping on properties with aim enhancing stability. Using electrospinning technology, electret particles were incorporated into at different concentrations (e.g., 1wt%, 1.5wt%, 2wt%). Characterization tests composite membranes, such scanning electron microscopy (SEM) X-ray diffraction (XRD), revealed that increased average fiber diameter enhanced β-phase content. tests, sensors made from electric particle-doped showed improvement electrical output under a 20N test pressure. Furthermore, increasing membrane area applying higher pressure further output. These results indicate appropriate can effectively improve membranes. Stability conducted three months after sensor fabrication demonstrated stability containing particles. Additionally, an efficient signal processing method was proposed, utilizing FIR digital low-pass filter remove high-frequency noise, smoothing prior eliminate baseline drift, improved AMPD algorithm accurately detect peak position features signal. This significantly accuracy feature extraction. conclusion, presents simple effective approach improving through combination technology. not only optimizes PVDF-based but also provides new insights technical support broad harvesting, smart electronics, other fields.

Language: Английский

Piezoelectric polymer generators: The large bending regime

Journal of Applied Physics, Journal Year: 2024, Volume and Issue: 136(18)

Published: Nov. 11, 2024

There is an important difference between piezoelectric polymer films and solid crystals for the application of generators. In case polymers, optimal response imposes a large bending regime. Starting from linear Curie’s constitutive equations, we develop analytical model under assumption regime resulting bulge testing configuration. This shows specific non-linear response, which follows power 2/3 mechanical excitation. The voltage corresponding are then studied experimentally as function angular frequency ω excitation, load resistance R, thickness film ℓ. experimental results carried out on polyvinylidene fluoride (PVDF) validate model.

Language: Английский