Tuning piezoelectric properties of P(VDF-TFE) films for sensor application

Fan, Xing; Sun, Mengdi; Li, Zhong; Chen, Zhenhua; Zhou, Xiaoyong; Lu, Quanxuan; Zhang, Zhicheng

doi:10.1016/j.reactfunctpolym.2022.105391

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…PVDF sensors are polymer materials known for their flexibility, durability, and chemical stability 15,16 . PVDF possesses properties, particularly piezoelectric, pyroelectric, and piezoresistive characteristics, making it suitable for various sensor applications 17,18 . Its piezoelectric properties enable the conversion of mechanical pressure or vibrations into electrical signals, making it highly useful in applications such as vibration detection, pressure measurement, and acoustic signal detection.…”

Section: Polyvinylidene Fluoride (Pvdf) Sensorsmentioning

confidence: 99%

Thermal cure monitoring of UV curing resin with PVDF sensor

Kim,

Lee,

Nam

et al. 2024

Laser 3D Manufacturing XI

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SLA(Stereolithography) printing technology can achieve high precision and accuracy compared to other 3D printing methods. However, the single laser movement mechanism has the disadvantage of increasing processing time during the printing process and causing problems such as incomplete curing and premature gelation. In this study, we address these challenges by using acoustic emission (AE)-based detection of curing defects during the printing process in SLA, which utilizes UV-curable resin as its primary material. PVDF (Polyvinylidene Fluoride) sensors are used to detect AE during resin curing. Signals were analyzed based on the presence or absence of specific events to avoid signal ambiguity caused by internal voids during resin curing. Several AE parameters were evaluated experimentally. The most suitable parameters were identified for the detection of thermal cure signals. Among these parameters, AE RMS and AE Count showed the most significant variations in response to thermal curing signals. The proposed method can be used for smart monitoring in SLA printing to detect defects, such as incomplete curing, early in the process, contributing to precision manufacturing.

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Section: Polyvinylidene Fluoride (Pvdf) Sensorsmentioning

confidence: 99%

Thermal cure monitoring of UV curing resin with PVDF sensor

Kim,

Lee,

Nam

et al. 2024

Laser 3D Manufacturing XI

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“…Significantly, the TFE monomer offers the advantages of low cost and stable performance in comparison to TrFE. Moreover, a lower amount of TFE unit (<10 mol %) is required to achieve a stable β phase, resulting in the highest level of ferroelectricity in the copolymer . Meanwhile, due to the lack of a suitable chemical modification method, there have been limited studies on regulating its dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Dielectric Performance of Poly(vinylidene fluoride-co-tetrafluoroethylene) through Chemical Grafting via Visible-Light Induced C–F Bond Activation

Wang,

Lei,

Yang

et al. 2024

ACS Appl. Energy Mater.

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Poly(vinylidene fluoride-co-tetrafluoroethylene) (P(VDF-TFE)), as an excellent electroactive material used in sensors and actuators, has been extensively studied in recent years. Unlike Cl-containing fluoropolymers, it is challenging to regulate the dielectric performance of P(VDF-TFE) by controllable chemical modification, owing to the inert C–F bonds. In this work, the grafting modification of P(VDF-TFE) was successfully achieved through C–F bond activation using an Ir-based photoredox catalyst under mild conditions. The influence of the PMMA content on the crystallization and dielectric properties of the graft copolymer was systematically investigated. Pristine P(VDF-TFE) with 20 mol % TFE units exhibits typical ferroelectric behavior. After introducing low-polarity PMMA side chains, the resulting graft copolymer can be effectively converted into relaxor ferroelectric or linear-like dielectric with dramatically reduced energy loss, thereby broadening its application field. Moreover, the graft copolymer prepared using this photocatalytic system exhibits lower leakage current density compared to the previously reported copper complex catalytic system, indicating a low metal ion residue, which is beneficial to the electric insulation properties.

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Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

Zhang

Zhu

et al. 2023

Adv Funct Materials

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Poly(vinylidene fluoride) (PVDF)‐based polymers demonstrate great potential for applications in flexible and wearable electronics but show low piezoelectric coefficients (e.g., −d33 < 30 pC N−1). The effective improvement for the piezoelectricity of PVDF is achieved by manipulating its semicrystalline structures. However, there is still a debate about which component is the primary contributor to piezoelectricity. Therefore, current methods to improve the piezoelectricity of PVDF can be classified into modulations of the amorphous phase, the crystalline region, and the crystalline–amorphous interface. Here, the basic principles and measurements of piezoelectric coefficients for soft polymers are first discussed. Then, three different categories of structural modulations are reviewed. In each category, the physical understanding and strategies to improve the piezoelectric performance of PVDF are discussed. In particular, the crucial role of the oriented amorphous fraction at the crystalline–amorphous interface in determining the piezoelectricity of PVDF is emphasized. At last, the future development of high performance piezoelectric polymers is outlooked.

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Tuning piezoelectric properties of P(VDF-TFE) films for sensor application

Cited by 6 publications

References 27 publications

Thermal cure monitoring of UV curing resin with PVDF sensor

Thermal cure monitoring of UV curing resin with PVDF sensor

Tailoring the Dielectric Performance of Poly(vinylidene fluoride-co-tetrafluoroethylene) through Chemical Grafting via Visible-Light Induced C–F Bond Activation

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

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