Improved response of ionic liquid-based bending actuators by tailored interaction with the polar fluorinated polymer matrix

Dias, J. C.; Correia, Daniela M.; Costa, Carlos M.; Ribeiro, Clarisse; Maceiras, Alberto; Vilas, José Luis; Botelho, Gabriela; Bermúdez, V. de Zea; Lanceros‐Méndez, S.

doi:10.1016/j.electacta.2018.11.049

Cited by 52 publications

(79 citation statements)

References 37 publications

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“…In these phases, the β‐ and γ‐phases are the most electrically active due to the high dipole moment within the unit cell. Therefore, promoting the formation of β‐ and γ‐phases in PVDF‐based composites has become an ongoing pursuit due to their extensive applications in sensors and actuators . For example, Dias et al used an ionic liquid (IL) to compound with PVDF and its copolymers.…”

Section: Resultsmentioning

confidence: 99%

“…For example, Dias et al used an ionic liquid (IL) to compound with PVDF and its copolymers. Consequently, the ionic liquid‐polymer composite with high electroactive phase exhibited excellent bending response and showed potential as a bending actuator application . Li et al found that the synergistic effect of PMMA and CNTs made PVDF‐based composites have a highly electroactive response, and the resulting CNT/PMMA/PVDF nanofibers showed potential applications as generators .…”

Section: Resultsmentioning

confidence: 99%

“…Polymer‐based nanocomposites with high dielectric constants (high‐k) have attracted extensive attention for their applications in embedded capacitors, actuators, energy storage devices, and so forth . These materials combine the advantages of fillers, such as high dielectric constant and good electrical conductivity, as well as the merits of polymers, such as proper processing, flexibility, mechanical properties, and high breakdown strength.…”

Section: Introductionmentioning

confidence: 99%

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Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

Song

Xia

Wei

et al. 2019

Macro Materials & Eng

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NanocompositesPoly(methyl methacrylate)-grafted carbon nanotubes (PMMA@MWCNTs) are nondestructively prepared via the integration of mussel-inspired polydopamine (PDA) chemistry and the surface-initiated atom transfer radical poly merization (ATRP) method. The structures and properties of the poly(vinylidene fluoride)-based (PVDF-based) nanocomposites filled with pristine MWCNTs and PMMA@MWCNTs are investigated. The results show that the encapsulation of PMMA on the MWCNTs surface not only improves the dispersibility of MWCNTs in the PVDF matrix but also enhances the interfacial interaction between MWCNTs and PVDF. The addition of PMMA@MWCNTs nanofillers to PVDF can effectively induce the crystal structure of PVDF to transform from the α-phase to the β/γ -phase, and nearly 100% β/γ -phase PVDF formed when the nanofiller loading is higher than 5 wt%. Compared with the MWCNTs/PVDF composites, the PMMA@MWCNTs/PVDF composites exhibit obvious improvement in the percolation threshold because the PMMA shells hinder the direct contact of the MWCNTs. Moreover, the loss tangent of the PMMA@MWCNTs/PVDF composites is effectively suppressed due to the reduced leakage current in the composites and the enhanced interfacial strength between the nanofiller and the matrix.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

Song

Xia

Wei

et al. 2019

Macro Materials & Eng

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“…Because of its nano-structure with high conductivity, low volatility, and good thermal, electrochemical, and chemical stability, IL has the advantage over traditional solvents and has become widely used in various applications in industry [27]. The IL-based polymers matrix has high conductivity (10 −4 to 10 −2 S cm −1 ) and high electrochemical stability (4-5.7 V) and thermostability (up to 300 • C) can be used for lithium-ion batteries and other solid electrolyte, dye-sensitized fuel cells and supercapacitors [28][29][30]. IL/PVDF composites have been developed for electrolyte in electromechanical actuator based in carbon nanotubes [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…The IL-based polymers matrix has high conductivity (10 −4 to 10 −2 S cm −1 ) and high electrochemical stability (4-5.7 V) and thermostability (up to 300 • C) can be used for lithium-ion batteries and other solid electrolyte, dye-sensitized fuel cells and supercapacitors [28][29][30]. IL/PVDF composites have been developed for electrolyte in electromechanical actuator based in carbon nanotubes [30,31]. IL-polymer have been successfully developed in biosensors, optical sensors, and conducting polymer sensors [31,32].…”

Section: Introductionmentioning

confidence: 99%

Using Annealing Treatment on Fabrication Ionic Liquid-Based PVDF Films

et al. 2020

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In this study, a simple method to obtain pure β-phase directly from the melt process is proposed. A series of PVDF and ionic liquid (IL) was prepared by a solvent casting method with appropriate associated with the subsequent annealing treatment. IL plays a role of filler, which can create strong electrostatic interaction with PVDF matrix and directly induce β-phase crystallization on the PVDF during the melt. PVDF film sample is immersed in hot water for annealing treatment at different temperatures (25 °C to 70 °C). We found that annealing in high temperatures especially can not only increase more IL inserted into the amorphous region of polymer matrix to make more phase transformation, but also accelerate IL removal. Characteristics and performance of the PVDF films were investigated by use of FTIR, XRD, SEM, and AFM. Piezoelectric coefficient d33 as well as d31, degree of crystallinity, and sensitivity are measured in experiment to verify the performance of PVDF film.

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Comparative Assessment of Ionic Liquid‐Based Soft Actuators Prepared by Film Casting Versus Direct Ink Writing

et al. 2021

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Multifunctional materials support many technological advances in materials science required by the increasing interactivity demand of the Internet of Things (IoT). [1] Among multifunctional materials, smart materials allow their implementation as sensing materials as they transduce different physicoÀchemical solicitations. Those materials include piezoelectric, pyroelectric, magnetostrictive, magnetoelectric, or shape memory materials, among others. [2] Electroactive polymers (EAPs) and their composites are an important class of smart materials applied in technological applications such as sensors and actuators, [3] biomedical, [4] environmental, [5] and energy harvesting [6] and storage applications, [7] among others, based on their active response but also on their tailorable mechanical, thermal, and chemical properties and versatility with respect to the processing techniques, including compatibility with additive manufacturing technologies.Within the EAP class, poly(vinylidene fluoride) (PVDF) and their copolymers are the most relevant for many piezo-, pyro-, and ferroelectric applications and stand out in comparison with other polymers for their higher dielectric constant and piezoelectric coefficient,

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Improved response of ionic liquid-based bending actuators by tailored interaction with the polar fluorinated polymer matrix

Cited by 52 publications

References 37 publications

Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

Using Annealing Treatment on Fabrication Ionic Liquid-Based PVDF Films

Comparative Assessment of Ionic Liquid‐Based Soft Actuators Prepared by Film Casting Versus Direct Ink Writing

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