Piezoelectric Structure With a 3-D Printed Mesh Layer

Mirkowska, Agnieszka; Kacprzyk, R.; Rozmaryniewicz, Kacper

doi:10.1109/tdei.2022.3168366

Cited by 8 publications

(1 citation statement)

References 34 publications

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“…They proposed a polylactic acid (PLA) mesh layer, PP electret foil, and elastomer top layer to improve the voltage response by optimizing the electrical properties and geometry of a specific layer. Among them, the PLA mesh layer was made by 3D printing, and the hexagonal holes accounted for 40% of the filling [16]. T.T.C.…”

Section: Introductionmentioning

confidence: 99%

Synchronized 3D Printing and Corona Charging for One-Step Prototyping of Polarized Polylactic Acid Electrets

Wang

Song

et al. 2023

Polymers

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Three-dimensional (3D) printing technology is advantageous in the fast prototyping of complex structures, but its utilization in functional material fabrication is still limited due to a lack of activation capability. To fabricate and activate the functional material of electrets, a synchronized 3D printing and corona charging method is presented to prototype and polarize polylactic acid electrets in one step. By upgrading the 3D printer nozzle and incorporating a needle electrode to apply high voltage, parameters such as needle tip distance and applied voltage level were compared and optimized. Under different experimental conditions, the average surface distribution in the center of the samples was −1498.87 V, −1115.73 V, and −814.51 V. Scanning electron microscopy results showed that the electric field contributes to keeping the printed fiber structure straight. The polylactic acid electrets exhibited relatively uniform surface potential distribution on a sufficiently large sample surface. In addition, the average surface potential retention rate was improved by 12.021-fold compared to ordinary corona-charged samples. The above advantages are unique to the 3D-printed and polarized polylactic acid electrets, proving that the proposed method is suitable for quickly prototyping and effectively polarizing the polylactic acid electrets simultaneously.

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Section: Introductionmentioning

confidence: 99%

Synchronized 3D Printing and Corona Charging for One-Step Prototyping of Polarized Polylactic Acid Electrets

Wang

Song

et al. 2023

Polymers

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Recent Advances in Ferroelectret Fabrication, Performance Optimization, and Applications

Wang,

Zhang,

Qiu

et al. 2024

Advanced Materials

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The growing demand for wearable devices has sparked a significant interest in ferroelectret films. They possess flexibility and exceptional piezoelectric properties due to strong macroscopic‐dipoles formed by charges trapped at the interface of their internal cavities. This review of ferroelectrets focuses on the latest progress in fabrication techniques for high temperature resistant ferroelectrets with regular and engineered cavities, strategies for optimizing their piezoelectric performance, and novel applications. The charging mechanisms of bipolar and unipolar ferroelectrets with closed and open‐cavity structures are explained first. Next, the preparation and piezoelectric behavior of ferroelectret films with closed, open and regular cavity structures using various materials are discussed. Three widely used models for predicting the piezoelectric coefficients (d33) are outlined. Methods for enhancing the piezoelectric performance such as optimized cavity design, utilization of fabric electrodes, injection of additional ions, application of DC bias voltage and synergy of foam structure and ferroelectric effect are illustrated. A variety of applications of ferroelectret films in acoustic devices, wearable monitors, pressure sensors and energy harvesters are presented. Finally, the future development trends of ferroelectrets towards fabrication and performance optimization are summarized along with its potential for integration with intelligent systems and large‐scale preparation.This article is protected by copyright. All rights reserved

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