Effect of different prestretching index and preloading on actuation behaviors of dielectric elastomer actuator

Wang, Hong; Yang, Liang; Zhang, Xining; Ang, Marcelo H.

doi:10.1016/j.jmrt.2021.10.029

Cited by 14 publications

(5 citation statements)

References 27 publications

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“…As shown in Figure 9D,E, when the strains are 10% and 20%, the resistance response signal becomes 500 times, and the maximum resistance first decreases and then gradually stabilizes, attributed to the viscoelastic influence of rubber composite materials 37 . Figure 9F,G shows that when the strain is 30%–40%, the change in peak resistance remains the same as the strain for 500 cycles, which is due to the influence of the prestretched MWCNT‐NSD 20 /VMQ composites 38 . The resistance response signal of the MWCNT‐NSD 20 /VMQ composites under a large strain was also studied.…”

Section: Resultsmentioning

confidence: 88%

“…37 Figure 9F, G shows that when the strain is 30%-40%, the change in peak resistance remains the same as the strain for 500 cycles, which is due to the influence of the prestretched MWCNT-NSD 20 /VMQ composites. 38 The resistance response signal of the MWCNT-NSD 20 /VMQ composites under a large strain was also studied. As shown in Figure 9H, the MWCNT-NSD 20 /VMQ composites exhibit excellent repeatability and stability after 15,000 cycles under 80% strain.…”

Section: Strain Sensing Behaviors and Interface Effect Of Mwcnt-nsd/v...mentioning

confidence: 99%

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Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Wan,

Yang,

Zhao

2024

Polymer Composites

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Conductive polymer composites use elastomers as a matrix for strain sensors. However, elastic polymer composites usually exhibit shoulder peak effects in their resistance response signals, limiting their applicability as strain sensors. In this study, we modified multiwalled carbon nanotubes (MWCNTs)/methyl vinyl silicone rubber (VMQ) by incorporating nanosilica (NSD) to eliminate the shoulder peak effect. The results showed that the addition of a suitable amount of NSD can improve the reconstruction of the conductive network of composite material and eliminated the shoulder peak effect of the composite material in the resistive response signal. The mechanism of eliminating the shoulder peak effect was elucidated, while the mechanical properties of the composite material were improved, which endowed the composite material with excellent strain sensing properties, including sensitivity (GF = 127) and response time (270 ms), and maintained excellent stability and recovery even in 15,000 cycles. These findings highlight the potential of our strain sensor for the real‐time strain monitoring of large‐deformation isolation bearings.Highlights NSD eliminates shoulder peak effect in MWCNT/VMQ composites. Explained the shoulder peak effect elimination mechanism. NSD enhanced mechanical properties of MWCNT/VMQ composites. MWCNT‐NSD20/VMQ composites have stable resistive strain response properties.

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Section: Resultsmentioning

confidence: 88%

Section: Strain Sensing Behaviors and Interface Effect Of Mwcnt-nsd/v...mentioning

confidence: 99%

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Wan,

Yang,

Zhao

2024

Polymer Composites

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“…The maximum resistance decreases as the number of cycles increases, which is due to the effect of hysteresis effect. After several loading–unloading cycles, the maximum and minimum resistance values change weakly and show excellent reversibility, which is because the composite is affected by pre-stretching [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

“…The maximum resistance decreases as the number of cycles increases, which is due to the effect of hysteresis effect. After several loading-unloading cycles, the maximum and minimum resistance values change weakly and show excellent reversibility, which is because the composite is affected by pre-stretching [36]. d-h) resistive response of CB-KH550/VMQ composites for 100 cycles at strains of 10%, 20%, 30%, 40%, and 50%; (i) statistics of the maximum and minimum resistive values of CB-KH550/VMQ composites for 18,000 tensile-release cycles at a strain of 50%; and (j) resistive response of CB-KH550/VMQ composites for 18,000 cycles at a strain of 50%.…”

Section: Resistance-strain Response Under Dynamic Loadingmentioning

confidence: 99%

Enhancement of the Electric-Force Response of Carbon Black/Silicone Rubber Composites by Silane Coupling Agents

Zhao,

Yang,

Wan

et al. 2024

Molecules

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Flexible strain sensors have a wide range of applications in the field of health monitoring of seismic isolation bearings. However, the nonmonotonic response with shoulder peaks limits their application in practical engineering. Here we eliminate the shoulder peak phenomenon during the resistive-strain response by adjusting the dispersion of conductive nanofillers. In this paper, carbon black (CB)/methyl vinyl silicone rubber (VMQ) composites were modified by adding a silane coupling agent (KH550). The results show that the addition of KH550 eliminates the shoulder peak phenomenon in the resistive response signal of the composites. The reason for the disappearance of the shoulder peak phenomenon was explained, and at the same time, the mechanical properties of the composites were enhanced, the percolation threshold was reduced, and they had excellent strain-sensing properties. It also exhibited excellent stability and repeatability during 18,000 cycles of loading–unloading. The resistance-strain response mechanism was explained by the tunneling effect theoretical model analysis. It was shown that the sensor has a promising application in the health monitoring of seismic isolation bearings.

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“…The maximum value of the DC voltage is limited by the dielectric strength of the elastomer film. In-plane pre-stretching of the elastomer is considered an effective method to increase the dielectric strength [18][19][20] and reduce the thickness of the elastomer film.…”

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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Effect of different prestretching index and preloading on actuation behaviors of dielectric elastomer actuator

Cited by 14 publications

References 27 publications

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Improving the stability of multiwalled carbon nanotube/silicone rubber composites strain sensors by nanosilica

Enhancement of the Electric-Force Response of Carbon Black/Silicone Rubber Composites by Silane Coupling Agents

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

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