Dielectric elastomer with excellent electromechanical performance by dipole manipulation of Poly(vinyl chloride) for artificial muscles under low driving voltage application

Li, Qizheng; He, Yijin; Tan, Shaobo; Zhu, Bofeng; Zhang, Xiao; Zhang, Zhicheng

doi:10.1016/j.cej.2022.136000

Cited by 19 publications

(8 citation statements)

References 56 publications

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“…Smart electroactive polymers (EAPs) are able to change their shape and size under applied electric fields. , EAPs are widely used in actuators, artificial muscles, sensors, and microreactors and other advanced electromechanical (EM) devices, so they have attracted extensive attention of researchers as a kind of functional material. − The strain of traditional rigid piezoelectric ceramic EM materials under an electric field is usually less than 0.5%. In contrast, the strain generated by flexible EAPs is about 1 order of magnitude higher. − In order to make the soft actuators have fast response and high efficiency, efforts have focused on the EAPs represented by dielectric elastomers (DEs), − electrostrictive polymers, and ferroelectric and relaxor ferroelectric polymers (RFPs) − recently.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

et al. 2022

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Electroactive polymer (EAP) is a kind of intelligent material that, driven by external electric field, could produce changes in shape or volume. As an important class of EAP materials, poly(vinylidene fluoride) (PVDF) based relaxor ferroelectric polymers show remarkable potential for applications in sensors, actuator, and artificial muscles because of their excellent electrostrictive properties. However, the strain of PVDF-based relaxor ferroelectrics relies strongly on a high electric field, which seriously damages their reliability and limits their practical applications as wearable devices. To explore more suitable materials for actuator applications, in this present work, we report the influences of a double bond (DB) on the electroactive properties of P(VDF-TrFE) (TrFE: trifluoroethylene). The crystalline phase of P(VDF-TrFE) is partially destroyed after the DB is introduced, and the molecular chain flexibility of the product P(VDF-TrFE-DB) can be greatly improved. Therefore, P(VDF-TrFE-DB) has a larger electric displacement while having a lower dipole orientation electric field compared with that of P(VDF-TrFE). The result confirms that the DB could tune the ferroelectric properties and effectively reduce the driving electric field of the PVDF-based relaxor ferroelectric polymers. This work offers a strategy for the preparation of novel EAPs with low driving electric fields.

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Section: Introductionmentioning

confidence: 99%

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

et al. 2022

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“…And the maximum k of Al(OH) 3 @GO/PDMS‐0.7% was 0.645 at 44.52 kV/mm, which was 2.5 times as large as than VHB (0.26 at 45 MV/m). [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

“…And the maximum k of Al(OH) 3 @GO/PDMS-0.7% was 0.645 at 44.52 kV/mm, which was 2.5 times as large as than VHB (0.26 at 45 MV/m). [51] F I G U R E 9 Actuated strains of PDMS composites under different electric fields.…”

Section: Actuated Strain Of Al(oh) 3 @Go/ Pdms Compositesmentioning

confidence: 99%

Improved electromechanical properties of polydimethylsiloxane composites with sandwich structured Al(OH)₃@GO nanosheets

et al. 2023

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Dielectric elastomer can undergo reversible deformation under external electric field, which was seen as the next generation drives for its excellent performance. Increasing the actuated strain under low electric field is a crucial strategy to further broaden the utilization range of dielectric elastomers. Herein, a sandwich structured aluminum hydroxide@graphene oxide (Al(OH)3@GO) nanosheets were fabricated by the bottom‐up method, and the hybrid was incorporated into the PDMS matrix to form dielectric elastomer composite. The presence of insulating Al(OH)3 layer can impede the creation of conductive pathways and hinder the occurrence of leakage currents, thus the composite presents a high dielectric constant value under a low loss. As a result, the Al(OH)3@GO/PDMS‐0.7% composite exhibited excellent performance with the best actuated strain value of 23.61% under a field of 44.52 kV/mm, which was 4.8 times that of pure PDMS. Meanwhile, the maximum electromechanical coupling efficiency (k) of Al(OH)3@GO/PDMS‐0.7% composite was 0.645, which was twice larger than VHB 4910. This work provided a reliable avenue for studying dielectric elastomer materials with excellent electromechanical properties. Highlights A new kind of sandwich‐like structured Al(OH)3@GO hybrids are fabricated. Effects of Al(OH)3@GO on the dielectric properties of composites are studied. The insulating Al(OH)3 layer can hinder occurrence of leakage currents. Al(OH)3@GO/PDMS composites exhibited improved electromechanical properties. Composites with high actuated strain 23.61% under 44.52 kV/mm are developed.

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“…In reference [27], a polymer of vinyl chloride and ethylene copolymer (P(VC-E)) was prepared using assisted reduction of PVC by TTMSS (Tris(trimethylsilyl)silane). The authors found that P(VC-E) with a 40 mol% of VC had the highest breakdown strength (85 MVm −1 ) and a high relative permittivity (>10) and under a low voltage (450 V), it presented a high cyclical operability with a lifelong time.…”

Section: Dielectric Elastomersmentioning

confidence: 99%

“…On the other hand, the cons of these polymers are their high driving voltage (~150 MV/m) Reprinted/adapted with permission from Ref. [27]. 2022, Elsevier.…”

Section: Dielectric Elastomersmentioning

confidence: 99%

Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

et al. 2022

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Unlike traditional actuators, such as piezoelectric ceramic or metallic actuators, polymer actuators are currently attracting more interest in biomedicine due to their unique properties, such as light weight, easy processing, biodegradability, fast response, large active strains, and good mechanical properties. They can be actuated under external stimuli, such as chemical (pH changes), electric, humidity, light, temperature, and magnetic field. Electroactive polymers (EAPs), called ‘artificial muscles’, can be activated by an electric stimulus, and fixed into a temporary shape. Restoring their permanent shape after the release of an electrical field, electroactive polymer is considered the most attractive actuator type because of its high suitability for prosthetics and soft robotics applications. However, robust control, modeling non-linear behavior, and scalable fabrication are considered the most critical challenges for applying the soft robotic systems in real conditions. Researchers from around the world investigate the scientific and engineering foundations of polymer actuators, especially the principles of their work, for the purpose of a better control of their capability and durability. The activation method of actuators and the realization of required mechanical properties are the main restrictions on using actuators in real applications. The latest highlights, operating principles, perspectives, and challenges of electroactive materials (EAPs) such as dielectric EAPs, ferroelectric polymers, electrostrictive graft elastomers, liquid crystal elastomers, ionic gels, and ionic polymer–metal composites are reviewed in this article.

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Dielectric elastomer with excellent electromechanical performance by dipole manipulation of Poly(vinyl chloride) for artificial muscles under low driving voltage application

Cited by 19 publications

References 56 publications

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

Improved electromechanical properties of polydimethylsiloxane composites with sandwich structured Al(OH)₃@GO nanosheets

Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

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Dielectric elastomer with excellent electromechanical performance by dipole manipulation of Poly(vinyl chloride) for artificial muscles under low driving voltage application

Cited by 19 publications

References 56 publications

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

Tuning the Ferroelectric Phase Transition of P(VDF-TrFE) through a Simple Approach of Modification by Introducing Double Bonds

Improved electromechanical properties of polydimethylsiloxane composites with sandwich structured Al(OH)3@GO nanosheets

Electroactive Polymer-Based Composites for Artificial Muscle-like Actuators: A Review

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Improved electromechanical properties of polydimethylsiloxane composites with sandwich structured Al(OH)₃@GO nanosheets