Study of thermally poled and corona charged poly(vinylidene fluoride) films

Jiang, Yadong; Ye, Yun; Yu, Junsheng; Wu, Zhiming; Li, Wei; Xu, Jin; Xie, Guangzhong

doi:10.1002/pen.20817

Cited by 56 publications

(35 citation statements)

References 30 publications

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“…b. The mean value of the residual polarization obtained in our test is 7.25 μC · cm −2 , higher than that in a previous DC thermal poling experiment . The relative standard deviation (RSD),

RSD = \frac{σ_{P_{r}}}{\overset{false¯}{P_{r}}} \times 100 %,

of all the samples is 3.74%.…”

Section: Resultscontrasting

confidence: 61%

“…Therefore, applying a high electric field to PVDF can both stimulate the α to β phase transition and pole the material for piezoelectricity. Many experiments applied this technique and successfully polarized PVDF for various applications . However, they mostly used a static electric field, which was difficult to ensure a steady‐state polarization, and provide limited insights into the polarization behavior.…”

Section: Introductionmentioning

confidence: 99%

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Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

Qin

Zhang

Zheng

et al. 2020

Polymer Engineering & Sci

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Poly(vinylidene) fluoride (PVDF) is a prototypical piezoelectric polymer, which exhibits a strong piezoelectricity after a poling treatment. In this work, we investigate the polarization behaviors of PVDF film under cyclic electric fields by measuring polarized currents. A compensation method is used to distinguish the polarized current from the capacitive and resistive currents. The PVDF samples with a thickness of 20 or 30 μm and an electrode area of 3 × 3 or 4 × 4 mm2 are employed, respectively. From the observations, we find that the electrode area does not affect the current density, but a thicker film has a higher residual polarization due to its larger fraction of effective switchable dipoles. The amplitude of the applied field primarily determines the residual polarization. Impressively, an α‐ to β‐phase transformation occurs above 225 MV · m−1 and the polarized current reaches the maximum and becomes converges at 350 MV · m−1. Moreover, a high degree and reproducible residual polarization is obtained through gradually increasing applied field from 50 to 350 MV · m−1, and the relative standard deviation is 3.74% for 20 available samples. Furthermore, a dipole switching model is used to describe the polarization behaviors of PVDF with a form of f(E) = Ae−B|E + C| and the fitting parameters give a further illustration of polarization behaviors in PVDF. POLYM. ENG. SCI., 60:645–656, 2020. © 2020 Society of Plastics Engineers

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“…b. The mean value of the residual polarization obtained in our test is 7.25 μC · cm −2 , higher than that in a previous DC thermal poling experiment . The relative standard deviation (RSD),

RSD = \frac{σ_{P_{r}}}{\overset{false¯}{P_{r}}} \times 100 %,

of all the samples is 3.74%.…”

Section: Resultscontrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

Qin

Zhang

Zheng

et al. 2020

Polymer Engineering & Sci

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“…Piezoelectric ceramics such as lead zirconate–titanate and barium titanate (BTO) have been utilized for their excellent dipole moment, high electromechanical coupling coefficient, and high dielectric constant in PVDF matrix to enhance the piezoelectric property . Among these ceramics, BTO is preferred as inorganic filler due to its environmentally friendly nature and ease in handling as a lead‐free material . However, piezoelectric ceramics require higher temperature for fabrication processing and can sometimes be too brittle to be used.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of BaTiO₃/PVDF Composites with Electric In Situ Poling for Pressure Sensor Applications

Kim

Torres

Villagrán

et al. 2017

Macro Materials & Eng

156

129

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This paper presents 3D printing of piezoelectric sensors using BaTiO3 (BTO) filler in a poly(vinylidene) fluoride (PVDF) matrix through electric in situ poling during the 3D printing process. Several conventional methods require complicated and time‐consuming procedures. Recently developed electric poling‐assisted additive manufacturing (EPAM) process paves the way for printing of piezoelectric filaments by incorporating polarizing processes that include mechanical stretching, heat press, and electric field poling simultaneously. However, this process is limited to fabrication of a single PVDF layer and quantitative material characterizations such as piezoelectric coefficient and β‐phase percentage are not investigated. In this paper, an enhanced EPAM process is proposed that applies a higher electric field during 3D printing. To further increase piezoelectric response, BTO ceramic filler is used in the PVDF matrix. It is found that a 55.91% PVDF β‐phase content is nucleated at 15 wt% of BTO. The output current and β‐phase content gradually increase as the BTO weight percentage increases. Scanning electron microscopy analysis demonstrates that larger agglomerates are formulated as the increase of BTO filler contents and results in increase of toughness and decrease of tensile strength. The highest fatigue strength is observed at 3 wt% BTO and the fatigue strength gradually decreases as the BTO filler contents increases.

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“…The former two phases are more widely used and studied [3, 4]. The advantages of β‐PVDF include its light weight, good ductility, as well as easily controllable electrical and mechanical properties [5–7]. However, neat PVDF cannot meet the mechanical, thermal, and corrosion resistance property requirements of a space environment [8, 9].…”

Section: Introductionmentioning

confidence: 99%

Morphology, crystallization, thermal, and mechanical properties of poly(vinylidene fluoride) films filled with different concentrations of polyhedral oligomeric silsesquioxane

Liu¹,

Sun²,

Zeng³

et al. 2012

Polymer Engineering & Sci

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Nanocomposites consisting of a poly(vinylidene fluoride) (PVDF) matrix and 0–8 wt% fluoropropyl polyhedral oligomeric silsesquioxane (FP‐POSS) were obtained through the solvent evaporation method. Morphology, crystallization, as well as thermal and mechanical properties were investigated. FP‐POSS, acting as a nucleating agent, exhibited robust miscibility with PVDF, enhancing the crystallinity of PVDF. A high relative fraction of the β phase was observed in the composites. The thermal degradation of PVDF was not significantly affected by FP‐POSS under a nitrogen atmosphere. Low addition of FP‐POSS, acting as nanofiller, led to remarkable improvement in mechanical properties, including hardness. The maximum was achieved at 3 wt%. High amounts led to inferior mechanical properties. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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Study of thermally poled and corona charged poly(vinylidene fluoride) films

Cited by 56 publications

References 30 publications

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

3D Printing of BaTiO₃/PVDF Composites with Electric In Situ Poling for Pressure Sensor Applications

Morphology, crystallization, thermal, and mechanical properties of poly(vinylidene fluoride) films filled with different concentrations of polyhedral oligomeric silsesquioxane

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Study of thermally poled and corona charged poly(vinylidene fluoride) films

Cited by 56 publications

References 30 publications

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

3D Printing of BaTiO3/PVDF Composites with Electric In Situ Poling for Pressure Sensor Applications

Morphology, crystallization, thermal, and mechanical properties of poly(vinylidene fluoride) films filled with different concentrations of polyhedral oligomeric silsesquioxane

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Product

Resources

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3D Printing of BaTiO₃/PVDF Composites with Electric In Situ Poling for Pressure Sensor Applications