Antiferroelectric Behavior of P(VDF-TrFE) and P(VDF-TrFE-CTFE) Ferroelectric Domains for Energy Harvesting

Shehzad, Mudassar; Malik, Tayyaba

doi:10.1021/acsaem.8b00478

Cited by 21 publications

(21 citation statements)

References 27 publications

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“…Electroactive polymers (EAPs) which change shape or size under applying an electrical stimulus are widely used for diverse applications of electromechanical devices in transducers, sensors, actuators, artificial muscles, smart skin, and soft robotics [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. The ferroelectric (FE) copolymer poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] owning superior piezoelectric properties of highly electroactive polar β phase crystalline structure coupled with a large crystalline domain size discloses striking mechanical properties, high dielectric constant, low dielectric loss, and high electromechanical response in conversion between electrical and mechanical energy [ 6 , 8 , 9 , 10 , 11 , 12 ]. However, the normal FE polymers generally exhibit lower energy density, broader hysteresis loop, and larger remnant polarization compared with relaxor ferroelectric (RFE) polymers [ 10 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The ferroelectric (FE) copolymer poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] owning superior piezoelectric properties of highly electroactive polar β phase crystalline structure coupled with a large crystalline domain size discloses striking mechanical properties, high dielectric constant, low dielectric loss, and high electromechanical response in conversion between electrical and mechanical energy [ 6 , 8 , 9 , 10 , 11 , 12 ]. However, the normal FE polymers generally exhibit lower energy density, broader hysteresis loop, and larger remnant polarization compared with relaxor ferroelectric (RFE) polymers [ 10 , 13 ]. In addition, terpolymers usually have higher dielectric constants than copolymers [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the normal FE polymers generally exhibit lower energy density, broader hysteresis loop, and larger remnant polarization compared with relaxor ferroelectric (RFE) polymers [ 10 , 13 ]. In addition, terpolymers usually have higher dielectric constants than copolymers [ 10 ]. As a result, it is highly desirable to achieve a higher dielectric constant and thus higher energy density in P(VDF-TrFE)-based RFE terpolymers rather than in the FE copolymer P(VDF-TrFE).…”

Section: Introductionmentioning

confidence: 99%

“…The resulting RFE terpolymer poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) [P(VDF-TrFE-CTFE)] has been reported to possess a narrow hysteresis loop, higher polarization, higher dielectric constant, higher electrostriction, and higher electromechanical response [ 15 , 16 , 17 ]. An enhancement in the polarization and dielectric responses was attained by blending the RFE terpolymer P(VDF-TrFE-CTFE) with the FE copolymer P(VDF-TrFE) [ 9 , 10 ]. Although comprehensive research has been devoted to elucidating the electroactive properties associated with dielectric and electromechanical responses [ 9 , 10 ], few studies focused on the mechanical properties of the composite sheets consisting of terpolymer and copolymer were extensively examined.…”

Section: Introductionmentioning

confidence: 99%

“…An enhancement in the polarization and dielectric responses was attained by blending the RFE terpolymer P(VDF-TrFE-CTFE) with the FE copolymer P(VDF-TrFE) [ 9 , 10 ]. Although comprehensive research has been devoted to elucidating the electroactive properties associated with dielectric and electromechanical responses [ 9 , 10 ], few studies focused on the mechanical properties of the composite sheets consisting of terpolymer and copolymer were extensively examined.…”

Section: Introductionmentioning

confidence: 99%

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Tunable Mechanical and Electrical Properties of Coaxial Electrospun Composite Nanofibers of P(VDF-TrFE) and P(VDF-TrFE-CTFE)

Lam

Hsiao

et al. 2021

IJMS

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The coaxial core/shell composite electrospun nanofibers consisting of relaxor ferroelectric P(VDF-TrFE-CTFE) and ferroelectric P(VDF-TrFE) polymers are successfully tailored towards superior structural, mechanical, and electrical properties over the individual polymers. The core/shell-TrFE/CTFE membrane discloses a more prominent mechanical anisotropy between the revolving direction (RD) and cross direction (CD) associated with a higher tensile modulus of 26.9 MPa and good strength-ductility balance, beneficial from a better degree of nanofiber alignment, the increased density, and C-F bonding. The interfacial coupling between the terpolymer P(VDF-TrFE-CTFE) and copolymer P(VDF-TrFE) is responsible for comparable full-frequency dielectric responses between the core/shell-TrFE/CTFE and pristine terpolymer. Moreover, an impressive piezoelectric coefficient up to 50.5 pm/V is achieved in the core/shell-TrFE/CTFE composite structure. Our findings corroborate the promising approach of coaxial electrospinning in efficiently tuning mechanical and electrical performances of the electrospun core/shell composite nanofiber membranes-based electroactive polymers (EAPs) actuators as artificial muscle implants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tunable Mechanical and Electrical Properties of Coaxial Electrospun Composite Nanofibers of P(VDF-TrFE) and P(VDF-TrFE-CTFE)

Lam

Hsiao

et al. 2021

IJMS

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Transparent Flexible Polymer Actuator with Enhanced Output Force Enabled by Conductive Nanowires Interlayer

Fook

Jeon²,

Lee

2019

Adv Materials Technologies

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attention recently. In these applications, electroactive polymers (EAPs) pose as an excellent solution. In fact, EAPs have been a rapidly growing focus of research due to the wide range of potential applications such as energy harvesters, sensors and actuators, artificial muscles, etc. [1][2][3][4][5][6][7] EAPs are lightweight, mechanically tough and flexible and can be formed in any arbitrary shape. These are major advantages compared to conventional rigid and bulky motor-based actuators. Furthermore, EAP actuators can provide localized haptic feedback while conventional actuators only provide whole-device haptics.There are two main classes of EAPs, namely ionic EAPs that operate by ionic diffusion and electronic EAPs that work by application of an electric field. In each class there exists many subcategories such as ferroelectric polymers as electronic EAPs which change shape in response to electric field due to their noncentrosymmetric crystal structure, [8][9][10] dielectric elastomers that expand due to the coulomb forces between electrodes squeezing the soft material, [11][12][13][14] electrostrictive graft elastomers with side-chains attached to the polymer backbone that align themselves when an electric field is applied, [15,16] smart hydrogels that swell in response to physical or chemical stimuli, [17][18][19] etc. For ionic EAPs, they include ionic polymer-metal composites (IPMC) which swell at the cation-rich layer and shrink at the other side due to migration of cations to the cathode under a voltage bias, [20][21][22][23] conductive polymers, which expand or contract due to oxidation/reduction in an electrolyte, [24][25][26][27] carbon nanomaterials including carbon nanotubes (CNTs), which utilize its negative thermal expansion coefficient and a supporting material with a large difference in thermal expansion coefficient to produce large bending under thermal stimuli, [28][29][30][31][32] highly oriented nylon with anisotropic thermal expansion behavior, [33][34][35] etc.While ionic EAPs work best in wet conditions, electronic EAPs are able to perform well in dry conditions, making them more robust and suitable for operation in ambient conditions. Although electronic EAPs require a strong electric field for activation, they usually have a much faster response than ionic EAPs. [36] This makes electronic EAP a more suitable candidate for vibrational haptic feedback applications where a frequency of 200 to 300 Hz is required for optimal human detection. [37] A well-studied electronic EAP is the piezoelectric polymer poly(vinylidene fluoride) (PVDF) and its copolymers which are highly transparent and exhibit high electric-field induced strain In this work, an approach to enhance the output force of polymer actuators by increasing the dielectric permittivity of the electroactive polymer (EAP), poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)), via incorporation of a nanowire interlayer into the polymer matrix is presented. The interlayer is formed by a network of hig...

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Structural and electrical response of poly(vinylidene fluoride‐co‐chlorotrifluoroethylene) copolymer free‐ standing films

Jaffari

Arooj

Can

et al. 2022

Polymer International

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Poly(vinylidene fluoride) (PVDF) based polymers were studied as potential dielectric candidates for polymer film capacitors. The present work focused on the structural and electrical responses of PVDF homopolymer and P(VDF‐CTFE) copolymers (CTFE, chlorotrifluoroethylene). The solvent casting technique was used for the fabrication of free‐standing polymer films. PVDF and P(VDF‐CTFE) copolymer films with different CTFE content were cast under different processing conditions. The structural response of these semicrystalline polymer films showed the existence of crystalline phases and changes in crystallinity depending upon the preparation conditions and CTFE content. The electrical responses of PVDF and P(VDF‐CTFE) copolymers were investigated under the application of low and high electric fields. For the dielectric study, temperature‐dependent dielectric measurements at different frequencies were assessed. Dielectric relaxation in the vicinity of the glass transition temperature was observed along with quantification of activation energies. The effect of CTFE content is also presented. Features such as interface polarization was observed in the high temperature regime. Furthermore, room temperature polarization versus electric field loops of PVDF and P(VDF‐CTFE) copolymers were measured at frequency values of 400 and 10 Hz. All PVDF and P(VDF‐CTFE) copolymers at low frequency showed lossy capacitor behavior which was further investigated by measuring polarization versus electric field loop over a wide range of frequencies, i.e. 0.1–400 Hz. Polarization values of PVDF and P(VDF‐CTFE) copolymer films with different CTFE content were compared on the bases of local dipole moments. © 2022 Society of Industrial Chemistry.

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Antiferroelectric Behavior of P(VDF-TrFE) and P(VDF-TrFE-CTFE) Ferroelectric Domains for Energy Harvesting

Cited by 21 publications

References 27 publications

Tunable Mechanical and Electrical Properties of Coaxial Electrospun Composite Nanofibers of P(VDF-TrFE) and P(VDF-TrFE-CTFE)

Tunable Mechanical and Electrical Properties of Coaxial Electrospun Composite Nanofibers of P(VDF-TrFE) and P(VDF-TrFE-CTFE)

Transparent Flexible Polymer Actuator with Enhanced Output Force Enabled by Conductive Nanowires Interlayer

Structural and electrical response of poly(vinylidene fluoride‐co‐chlorotrifluoroethylene) copolymer free‐ standing films

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