On the understanding of dielectric elastomer and its application for all-soft artificial heart

Wu, Wenjie; Zhang, Shuangkun; Wu, Zhanpeng; Qin, Sichen; Li, Fanzhu; Song, Tianfu; Cao, Xia; Wang, Zhong Lin; Zhang, Liqun

doi:10.1016/j.scib.2020.12.033

Cited by 32 publications

(20 citation statements)

References 70 publications

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“…These characteristics put DEAs as one of the potential candidates for pumping operation, as well as for the development of a total artificial heart. [19] DEAs are commonly constructed using silicone elastomers, acrylic elastomers (e.g., very-high bonding tapes: VHBs from 3 M), polyurethane (PU) elastomers, and natural rubber. Dielectric permittivities and electrical breakdown are two crucial aspects in which silicone dielectric materials underperform compared with acrylic-based DEs.…”

Section: Doi: 101002/adem202100121mentioning

confidence: 99%

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Strong, Ultrastretchable Hydrogel‐Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems

et al. 2021

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Nature's pumping systems allow for a more even stress distribution throughout the circuit than human-made devices. [1,2] Squid and jellyfish locomotion involves active fluid movement by soft tubular membranes. This also pertains to the transport of fluids within vessel invertebrates and the associated biofluid dynamics. To limit the damage to tissues (e.g., cardiac tissues), it is imperative to bound the problem of local stress maxima. Assistive devices with more muscle-like behavior are now required and soft actuators lend themselves for this purpose. [3,4] Human-made examples of valveless chamber pumps include bellows and diaphragms, with natural analogies of these found in urethral pumps, jellyfish jet propulsion, dragonfly nymphs' anal jets, snakes, spiders with venom injection, and insects blood-and-nectar sucking. [2] Attempts have been made to model the squid and jellyfish with dielectric elastomers (DEs), with limited performance. [5] Translatory or peristaltic pumping corresponding to valveless moving chambers is found in intestines, mammalian esophagus, annelid hearts, and those of holothurians and arthropods, as well as burrowing worms. [2] In this spirit, biorobotics aims to emulate natural system performance to study the underlying fundamental mechanisms of complex behaviors such as locomotion [6,7] in fluids which can involve pumping action. [8] However, the substantial utilization of soft materials poses an essential discrepancy between animals and conventional robots, [9] due to its high-impact dissipation energy, damping oscillations, and the smoothing out of irregular movements and forces. Soft active materials are therefore now required to develop compliant, intelligent systems to develop more life-like capabilities with less impedance mismatch vis-a-vis natural systems. [10,11] When it comes to soft actuators inspired by muscle-like behavior, a variety of solutions have been proposed, each of which with its limitations. For example, fluidic soft actuators [12] have been used in a multitude of applications, [13,14] though the speed of operation and efficiency still pose major limitations. Likewise, thermally actuated fiber-reinforced polymer-based artificial actuators generate large actuation forces, though these solutions are

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Section: Doi: 101002/adem202100121mentioning

confidence: 99%

“…These characteristics put DEAs as one of the potential candidates for pumping operation, as well as for the development of a total artificial heart. [ 19 ]…”

Section: Introductionmentioning

confidence: 99%

Strong, Ultrastretchable Hydrogel‐Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems

et al. 2021

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“…Also, to address the lesions of heart failure patients, Wu et al proposed to replace the middle layer of the heart wall with a polyphosphazene (PPZ)-based DEA. [278] Design based on a dipoleconformation-actuated strain model, the PPZ achieved 80% actuated strains at 54 V μm À1 without prestrains. Owing to its high performance, an artificial ventricle composed of PPZ was fabricated and generated similar hydraulic pressure waveforms with human ventricles, indicating their comparable functionalities.…”

Section: Application Toward Ihmimentioning

confidence: 99%

Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

Chen

Tan

Gong

et al. 2021

Advanced Intelligent Systems

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Soft electrical actuators driven by low voltages are promising for interactive human-machine interfaces (iHMI) applications including executing orders to complete various tasks and communicating with humans. The attractive features of low-voltage soft electrical actuators include their good safety, low power consumption, small system size, and nonrigid or deformable characteristics. This review covers three typical classes of electrical actuators, namely, electrochemical, electrothermal, and other electrical (dielectric, electrostatic, ferroelectric, and plasticized gel) actuators according to their mechanism and working potential range. For each kind of actuators, the advantages, working principle, device configuration/design, materials selection, recent progress, and potential applications for iHMI are summarized, with the strategies for enhancing the actuation performance under low voltages being highlighted. Finally, the challenges for those soft actuators and possible solutions are discussed.

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“…Polyphosphazene is a unique class of hybrid polymers with an amazing structural design. [ 1,2 ] It has a wide range of applications in high‐performance elastomers such as low‐temperature elastomers, [ 3–5 ] flame‐retardant materials, [ 6–8 ] stretchable electronics, [ 9,10 ] bionic muscles, [ 11,12 ] super‐hydrophobic materials, [ 13,14 ] and biodegradable materials. [ 15–17 ] However, there are few reports about recyclable and self‐healing polyphosphazene, while similar studies are popular in polysiloxane.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Polyphosphazene Networks with Modulating Shape Memory and Self‐Healing Capacity by Double Coordination Interactions

Zhao

Zhang

et al. 2021

Macro Materials & Eng

Self Cite

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A modern class of self‐healing polyphosphazene elastomers has been synthesized using coordination bonds for the first time. Two categories of carboxyl‐modified polyphosphazene have been synthesized, and 16 cross‐linked polymers have been fabricated by tuning the concentration of different metal ions, which also allows modifying the properties of the elastomer by adjusting the interactions. This design enables the polymer network to form a hierarchical and dynamic structure without introducing complex ligands. The polyphosphazene networks can be toughened and enhanced by the dynamic coordination structure. Due to the distinct design, the synthesized elastomers show unprecedented properties in halogen‐free polyphosphazenes, including high tensile stress (1.82 MPa), high malleability (≈1100%), shape memory, self‐healing, and thermal processing capacity.

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On the understanding of dielectric elastomer and its application for all-soft artificial heart

Cited by 32 publications

References 70 publications

Strong, Ultrastretchable Hydrogel‐Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems

Strong, Ultrastretchable Hydrogel‐Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems

Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

Dynamic Polyphosphazene Networks with Modulating Shape Memory and Self‐Healing Capacity by Double Coordination Interactions

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