Electroactive fluoropolymers and polyamides

Wongwirat, Thumawadee; Manuspiya, Hathaikarn; Zhu, Lei

doi:10.1016/b978-0-12-821873-0.00003-5

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…At 90 °C, uniaxial stretching is favored to produce the βphase. Also, all ferroelectric domains must be oriented by an electrical polarization step for the piezoelectric property to occur, and aligned domains are absent from the polymer matrix [18]. During the PVDF-based material synthesis, the additive can modulate the phase formation.…”

Section: Introductionmentioning

confidence: 99%

Ytterbium-doping effect on the electrochemical and piezoelectric properties of poly(vinylidene fluoride) films

Perdigon-Lagunes,

Estevez,

Zorrilla-Cangas

et al. 2024

Mater. Res. Express

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The optimal molar ratio of poly(vinylidene fluoride) (PVDF): dimethyl sulfoxide (DMSO) was investigated that promoted the β-phase formation, used during the PVDF film synthesis. The solution cast method was used for doping the PVDF films with 1.5% w/v ytterbium (III) nitrate salt hexahydrate. In general, Yb-doping in PVDF films improves thermal resistance, promotes β-phase formation, modifies the monomer conformation, reduces reversibility to electrochemical processes, and increases the d33 coefficient of piezoelectricity. The β-phase formation caused by Yb-doping alters the internal structures of the trans-gauche-trans-gauche' (TGTG') and all-trans (TTTT) chains inside the polymeric network. The coexistence between the trans-gauche and all-trans structures provides in both films the α-phase and β-phase coexistence. The presence of self-polarized CH2-CF2 dipoles, where the concentration of fluorine remains the same and the CH2 drastically increases after Yb3+ incorporation. The quasi-reversible shape shown in both voltammetry cyclic curves is related to irreversible oxidation and reduction reactions. Yb-PVDF exhibits specific pseudocapacitance values that are 30% higher than those of the PVDF films. Finally, the piezoelectric properties were improved with ytterbium incorporation.

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Section: Introductionmentioning

confidence: 99%

Ytterbium-doping effect on the electrochemical and piezoelectric properties of poly(vinylidene fluoride) films

Perdigon-Lagunes,

Estevez,

Zorrilla-Cangas

et al. 2024

Mater. Res. Express

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“…Recently, polyvinylidene fluoride (PVDF) has gained popularity as an effective tribolayer substance for LS-TENG because of its strong negative polarity and superior mechanical characteristics [17][18][19][20]. The triboelectric and dielectric characteristics of PVDF might be changed as a result of its polymorphism, according to, namely, α, β, γ, δ, and ε [21]. The crystalline phase, with its highly ordered crystalline lamellae, has specific electrical and mechanical properties and is important in the industry.…”

Section: Introductionmentioning

confidence: 99%

Driving the Polyvinylidene Fluoride Crystallization via Surface Functionalization of Ferromagnetic Nanoparticles for Liquid-Solid Triboelectric Nanogenerator Enhancement

Nguyen

et al. 2023

International Journal of Energy Research

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In order to meet the growing demand for sustainable and renewable energy, significant processes have been achieved in the energy harvesting field in recent years. Due to its strong polarity property and superior mechanical characteristics, polyvinylidene fluoride (PVDF) serves as the most attractive material for a liquid-solid triboelectric nanogenerator (LS-TENG). PVDF-based TENG has come a long way thus far. Hence, we developed a high-performance magnetoelectric (ME) nanocomposite membrane made of PVDF and CoFe2O4 nanoparticles for application in the triboelectric layer of the LS-TENG device. Due to the large magnetic anisotropy of CoFe2O4, a strong interaction between the electromagnetic phase and the crystalline phase could well be established. Moreover, a chemical technique is used to introduce 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) with a reasonably extended fluoride chain to increase the dispersion of CoFe2O4 nanoparticles in the PVDF. Thus, the crystalline β phase of the membrane increased to 77.7% with 10 wt.% CoFe2O4 and reached a maximum value of 85.4% with 10 wt.% CoFe2O4@POTS in PVDF matrix, indicating an increase in polarity property and dielectric constant of the nanocomposite membrane. Besides, the CoFe2O4/PVDF-based TENG also delivers a power density of 1.62 W/m2, which is 2.7 higher than the pure PVDF-based TENG. This work demonstrates a novel technique for increasing the β phase of the CoFe2O4/PVDF nanocomposite membrane, which could also improve the LS-TENG output performance for real-life applications in energy harvesting.

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“…Low-cost sensors, devices, and actuators can be manufactured from these materials by 3D printing also. 16–19 To investigate the mechanical stress, strain, magnetic and electrical properties in such smart composites and ceramics, the study of butterfly strain loops has been reported. 20,21 As regards repairing heritage structures by the 3D printing approach, composite prepared from recycled plastic waste with electro-active and one-way programming features has been reportedly proposed acceptable as a customized repair solution.…”

Section: Introductionmentioning

confidence: 99%

Multi-material printing of PVDF composites: A customized solution for maintenance of heritage structures

Kumar

Singh

Ahuja

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the past three decades, 3D printing technologies have emerged as a convenient tool for the repair and maintenance of heritage structures. But hitherto little has been reported on multi-material 3D printed composites with 4D properties for the repair and maintenance of heritage structures. The present study reports the investigations on multi-material 3D printing of conducting and non-conducting polyvinylidene fluoride (PVDF) composite layers with self-actuating and self-healing properties to repair non-structural cracks in heritage buildings. The non-conducting (PVDF-CaCO3) and conducting (PVDF-graphene-Mn doped ZnO) composites were 3D printed and tested for electrostriction-based strain measurement for 4D analysis. The thermo-mechanical properties of the composite solution were obtained from dynamic mechanical analysis (DMA). The electrical, bonding, and morphological properties were investigated by current-voltage (I-V), x-ray diffraction (XRD), Fourier transformed infrared (FTIR), and scanning electron microscopy (SEM)-energy dispersive spectroscopy (EDS) analysis. Results of the self-elongation and contraction by electrostriction in PVDF composite demonstrate the feasibility of 3D printing technology as a novel tool to fabricate cost-effective smart solutions for the repair and maintenance of heritage structures.

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Electroactive fluoropolymers and polyamides

Cited by 4 publications

References 42 publications

Ytterbium-doping effect on the electrochemical and piezoelectric properties of poly(vinylidene fluoride) films

Ytterbium-doping effect on the electrochemical and piezoelectric properties of poly(vinylidene fluoride) films

Driving the Polyvinylidene Fluoride Crystallization via Surface Functionalization of Ferromagnetic Nanoparticles for Liquid-Solid Triboelectric Nanogenerator Enhancement

Multi-material printing of PVDF composites: A customized solution for maintenance of heritage structures

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