Phase Transformation, Surface Morphology and Dielectric Property of P(VDF-HFP)/MgCl<sub>2</sub>·6H<sub>2</sub>O Nanocomposites

Yuennan, Jureeporn; Sukwisute, Pisan; Boripet, B.; Muensit, Nantakan

doi:10.1088/1742-6596/901/1/012085

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This experience arises from hydrogen bonding between the ionic interactions and unit chain of the polymer with the hydrated Mg–salt and the polar solvent. Various studies have been undertaken to improve the polar β-phase with the incorporation of conductive elements, for example, MWNTs, CNTs, and graphene [15,16,17,18,19,20,21]. The report by Zhou et al [22] demonstrated the β-phase of P(VDF)/graphene composite nanofibers increased with an increase of graphene 0.1 wt %.…”

Section: Introductionmentioning

confidence: 99%

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

2019

View full text Add to dashboard Cite

The poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) polymer based on electrostrictive polymers is essential in smart materials applications such as actuators, transducers, microelectromechanical systems, storage memory devices, energy harvesting, and biomedical sensors. The key factors for increasing the capability of electrostrictive materials are stronger dielectric properties and an increased electroactive β-phase and crystallinity of the material. In this work, the dielectric properties and microstructural β-phase in the P(VDF-HFP) polymer were improved by electrospinning conditions and thermal compression. The P(VDF-HFP) fibers from the single-step electrospinning process had a self-induced orientation and electrical poling which increased both the electroactive β-crystal phase and the spontaneous dipolar orientation simultaneously. Moreover, the P(VDF-HFP) fibers from the combined electrospinning and thermal compression achieved significantly enhanced dielectric properties and microstructural β-phase. Thermal compression clearly induced interfacial polarization by the accumulation of interfacial surface charges among two β-phase regions in the P(VDF-HFP) fibers. The grain boundaries of nanofibers frequently have high interfacial polarization, as they can trap charges migrating in an applied field. This work showed that the combination of electrospinning and thermal compression for electrostrictive P(VDF-HFP) polymers can potentially offer improved electrostriction behavior based on the dielectric permittivity and interfacial surface charge distributions for application in actuator devices, textile sensors, and nanogenerators.

show abstract

Section: Introductionmentioning

confidence: 99%

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

2019

View full text Add to dashboard Cite

show abstract

“…This involves mixing and blending with groups of fillers, such as montmorillonite (MMT) [ 14 ], magnesium chloride hexahydrate (MgCl 2 ·6H 2 O) [ 15 ], multiwalled carbon nanotubes (MWNTs) [ 16 ], carbon black [ 17 ], WO 3 ·H 2 O [ 18 ], nickel chloride hexahydrate salt [ 19 ], Ce 3+ /graphene [ 20 ] and Ni-doped ZnO/P(VDF-HFP) [ 21 ]. Parangusan et al reported that a 0.5 wt% Ni-doped ZnO/P(VDF-HFP) nanocomposite showed the β-phase and the high dielectric constant up to 55 at 1 Hz, which achieved a maximum output voltage of 1.2 V. Sajad et al [ 22 ] found that the electrospinning process could enhance the β-phase, and thus, adding 15% ZnO nano-powder/PVDF composite nanofibers increased the electrical response to 1.1 V. Yuennan et al [ 15 ] presented that the large dielectric constant of a P(VDF-HFP)/MgCl 2 ·6H 2 O film is up to 13 and 19 from the P(VDF-HFP)/AlCl 3 ·6H 2 O film at 100 Hz. In some filler based on terpolymer content, P(VDF-TrFE-CFE) [ 23 ] has an enormous power density (7200 nW/cm 3 ) at an electric field of 5 V/μm, but this terpolymer has a great modulus, requiring a complicated preparation, and it is also more expensive than an electrostrictive P(VDF-HFP) matrix.…”

Section: Introductionmentioning

confidence: 99%

Phase and Structure Behavior vs. Electromechanical Performance of Electrostrictive P(VDF-HFP)/ZnO Composite Nanofibers

et al. 2021

View full text Add to dashboard Cite

In this work, we improved the electromechanical properties, electrostrictive behavior and energy-harvesting performance of poly(vinylidenefluoridene-hexafluoropropylene) P(VDF-HFP)/zinc oxide (ZnO) composite nanofibers. The main factor in increasing their electromechanical performance and harvesting power based on electrostrictive behavior is an improved coefficient with a modified crystallinity phase and tuning the polarizability of material. These blends were fabricated by using a simple electrospinning method with varied ZnO contents (0, 5, 10, 15 and 20 wt%). The effects of the ZnO nanoparticle size and content on the phase transformation, dielectric permittivity, strain response and vibration energy harvesting were investigated. The characteristics of these structures were evaluated utilizing SEM, EDX, XRD, FT-IR and DMA. The electrical properties of the fabrication samples were examined by LCR meter as a function of the concentration of the ZnO and frequency. The strain response from the electric field was observed by the photonic displacement apparatus and lock-in amplifier along the thickness direction at a low frequency of 1 Hz. Moreover, the energy conversion behavior was determined by an energy-harvesting setup measuring the current induced in the composite nanofibers. The results showed that the ZnO nanoparticles’ component effectively achieves a strain response and the energy-harvesting capabilities of these P(VDF-HFP)/ZnO composites nanofibers. The electrostriction coefficient tended to increase with a higher ZnO content and an increasing dielectric constant. The generated current increased with the ZnO content when the external electric field was applied at a vibration of 20 Hz. Consequently, the ZnO nanoparticles dispersed into electrostrictive P(VDF-HFP) nanofibers, which offer a large power density and excellent efficiency of energy harvesting.

show abstract

Phase Transformation, Surface Morphology and Dielectric Property of P(VDF-HFP)/MgCl₂·6H₂O Nanocomposites

Cited by 2 publications

References 8 publications

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

Phase and Structure Behavior vs. Electromechanical Performance of Electrostrictive P(VDF-HFP)/ZnO Composite Nanofibers

Contact Info

Product

Resources

About

Phase Transformation, Surface Morphology and Dielectric Property of P(VDF-HFP)/MgCl2·6H2O Nanocomposites

Cited by 2 publications

References 8 publications

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

Phase and Structure Behavior vs. Electromechanical Performance of Electrostrictive P(VDF-HFP)/ZnO Composite Nanofibers

Contact Info

Product

Resources

About

Phase Transformation, Surface Morphology and Dielectric Property of P(VDF-HFP)/MgCl₂·6H₂O Nanocomposites