CNT loaded PVDF-KNN nanocomposite films with enhanced piezoelectric properties

Shoorangiz, Mehdi; Sherafat, Z.; Bagherzadeh, Elham

doi:10.1016/j.ceramint.2022.02.047

Cited by 37 publications

(25 citation statements)

References 50 publications

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“…Furthermore, by using calorimetry methods, wide angle X-ray scattering (WAXS), and small angle X-ray scattering (SAXS) techniques, the correlation of the crystallinity, nanostructures, and lamellae dimensions, with electrical performance of the nanocomposite films is elucidated. The nanocomposite film with 0.1 wt% AGO demonstrated superior piezoelectric and ferroelectric performance compared with state-of-the-art reports in the literature [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] . consumed to convert carboxylic acid groups to ammonium carboxylates.…”

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confidence: 86%

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Abdolmaleki

Haugen

Buhl³

et al. 2023

Advanced Science

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The electrical properties of pristine fluoropolymers are inferior due to their low polar crystalline phase content and rigid dipoles that tend to retain their fixed moment and orientation. Several strategies such as electrospinning, electrohydrodynamic pulling, and template-assisted growing have been proven to enhance the electrical properties of fluoropolymers, however, these techniques are mostly very hard to scale-up and expensive. Here, we propose a facile interfacial engineering approach based on amine-functionalized graphene oxide (AGO) to manipulate the intermolecular interactions in poly (vinylidenefluoride-trifluoroethylene) (PVDF-TrFE) to induce β-phase formation, enlarge the lamellae dimensions, and align the micro-dipoles. The coexistence of primary amine and hydroxyl groups on AGO nanosheets offers strong hydrogen bonding with fluorine atoms, which facilitates domain alignment, resulting in an exceptional remnant polarization of 11.3 µC cm -2 . PVDF-TrFE films with 0.1 wt% AGO demonstrated voltage coefficient, energy density, and energy-harvesting figure of merit values of 0.30 Vm N -1 , 4.75 J cm -3 , and 14 pm 3 J -1 , respectively, making it outstanding compared with state-of-the-art ceramic-free ferroelectric films. We believe this work can open-up new insights towards structural and morphological tailoring of fluoropolymers to enhance their electrical and electromechanical performance and pave the way for their industrial deployment in next-generation wearables and human-machine interfaces.

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confidence: 86%

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Abdolmaleki

Haugen

Buhl³

et al. 2023

Advanced Science

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“…Comparatively, KNN-based ceramics have a high T c (B420 1C) and a large P r (B33 mC cm À2 ). 26,27 In addition, under the condition of 50% K and 50% Na, KNN may exhibit a morphotropic phase boundary (MPB) that shows excellent piezoelectric and dielectric properties. [28][29][30] When the ceramic filler is used as a functional filler in the composites, and especially high content of ceramic filler introduced into the polymer matrix will not only reduce the flexibility of the material but also correspondingly introduce some defects into the matrix, thus affecting the synergistic effect of two phases.…”

Section: Introductionmentioning

confidence: 99%

“…Comparatively, KNN-based ceramics have a high T c (∼420 °C) and a large P r (∼33 μC cm −2 ). 26,27 In addition, under the condition of 50% K and 50% Na, KNN may exhibit a morphotropic phase boundary (MPB) that shows excellent piezoelectric and dielectric properties. 28–30…”

Section: Introductionmentioning

confidence: 99%

Graphene doping to enhance the mechanical energy conversion performances of GR/KNN/P(VDF-TrFE) flexible piezoelectric sensors

Zhang

Xia

Cao

et al. 2023

Phys. Chem. Chem. Phys.

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“…Therefore, when a mechanical force is applied, the electric dipole moments separate and the opposite surfaces of a flat sample become positively and negatively charged creating a piezopotential that leads to a flow of the free electrons through the external circuit to reach a balanced state again. [1][2][3][4][5] Piezoelectric materials have been employed in various technological applications including sensors, actuators, and energy harvesting devices. 1,6,7 The energy conversion efficiency of these materials can be assessed by the piezoelectric constant or piezoelectric charge coefficient (d 33 ) that refers to the materials electric response to an applied force in units of electrical charge (in Coulomb) per unit of force (in Newton).…”

Section: Introductionmentioning

confidence: 99%

Development of poly(vinylidene fluoride)/thermoplastic polyurethane/carbon black‐polypyrrole composites with enhanced piezoelectric properties

et al. 2023

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Poly(vinylidene fluoride)/thermoplastic polyurethane (PVDF/TPU) composites filled with carbon‐black polypyrrole were prepared via melt compounding followed by compression molding and fused filament fabrication. CB‐PPy was added to the blends from 0 up to 15% to possible act as nucleating filler for PVDF β phase in order to increase its piezoelectric response. The influence of blending PVDF and TPU and of the addition of CB‐PPy on the overall crystallinity, content of β phase, and piezoelectric response of composites were investigated by differential scanning calorimetry (DSC), Fourier‐transformed infrared spectroscopy (FTIR), X‐ray diffraction (XRD) and determination of the piezoelectric coefficient (d33). It was found that the addition of TPU to PVDF induced an increase of the crystallinity degree and content of β phase in PVDF. Moreover, although the degree of crystallinity of the composites decreased with the addition of CB‐PPy, the percentage of β phase in PVDF was increased. This effect is more significant in samples with filler concentration higher than 6 wt%. As expected, the d33 of the composites increased as the content of the β phase increased. Furthermore, 3D printed samples displayed lower content of β phase and reduced piezoelectric responses when compared to compression molded samples with same composition.

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CNT loaded PVDF-KNN nanocomposite films with enhanced piezoelectric properties

Cited by 37 publications

References 50 publications

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Interfacial Engineering of PVDF‐TrFE toward Higher Piezoelectric, Ferroelectric, and Dielectric Performance for Sensing and Energy Harvesting Applications

Graphene doping to enhance the mechanical energy conversion performances of GR/KNN/P(VDF-TrFE) flexible piezoelectric sensors

Development of poly(vinylidene fluoride)/thermoplastic polyurethane/carbon black‐polypyrrole composites with enhanced piezoelectric properties

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