Bio-inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles

Kim, Shi Hyeong; Kwon, Cheong Hoon; Park, Karam; Mun, Tae Jin; Lepró, Xavier; Baughman, Ray H.; Spinks, Geoffrey M.; Kim, Seon Jeong

doi:10.1038/srep23016

Cited by 75 publications

(72 citation statements)

References 28 publications

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“…Water-driven muscles have also been demonstrated by infiltration with water-absorbing polymers, such as poly(diallyldimethylammonium chloride) (PDDA). Such coiled PDDA/CNT hybrid muscles have delivered more than 40% stroke and a contractile work of 2.17 kJ/kg when exposed to between 10% and 99% relative humidity (32). Even without additional guest materials, the large surface area provided by a CNT scaffold can be used to drive actuation.…”

Section: Emerging Types Of Twisted Musclesmentioning

confidence: 99%

New twist on artificial muscles

Haines¹,

Spinks

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

290

211

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Lightweight artificial muscle fibers that can match the large tensile stroke of natural muscles have been elusive. In particular, low stroke, limited cycle life, and inefficient energy conversion have combined with high cost and hysteretic performance to restrict practical use. In recent years, a new class of artificial muscles, based on highly twisted fibers, has emerged that can deliver more than 2,000 J/kg of specific work during muscle contraction, compared with just 40 J/kg for natural muscle. Thermally actuated muscles made from ordinary polymer fibers can deliver long-life, hysteresis-free tensile strokes of more than 30% and torsional actuation capable of spinning a paddle at speeds of more than 100,000 rpm. In this perspective, we explore the mechanisms and potential applications of present twisted fiber muscles and the future opportunities and challenges for developing twisted muscles having improved cycle rates, efficiencies, and functionality. We also demonstrate artificial muscle sewing threads and textiles and coiled structures that exhibit nearly unlimited actuation strokes. In addition to robotics and prosthetics, future applications include smart textiles that change breathability in response to temperature and moisture and window shutters that automatically open and close to conserve energy.

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Section: Emerging Types Of Twisted Musclesmentioning

confidence: 99%

New twist on artificial muscles

Haines¹,

Spinks

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

290

211

View full text Add to dashboard Cite

show abstract

“…The addition of water‐absorbing guest materials to twisted hydrophobic CNT yarns is also a commonly used mode of actuation. Kim et al prepared a crimped and creped structure using a highly twisted CNT sheet stack and a hydrophilic poly(diallyldimethylammonium chloride) (PDDA) guest . PDDA/CNT can be actuated by changes in water absorption or ambient RH.…”

Section: Functional Components Of Stimesmentioning

confidence: 99%

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

et al. 2019

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The programmable nature of smart textiles makes them an indispensable part of an emerging new technology field. Smart textile‐integrated microelectronic systems (STIMES), which combine microelectronics and technology such as artificial intelligence and augmented or virtual reality, have been intensively explored. A vast range of research activities have been reported. Many promising applications in healthcare, the internet of things (IoT), smart city management, robotics, etc., have been demonstrated around the world. A timely overview and comprehensive review of progress of this field in the last five years are provided. Several main aspects are covered: functional materials, major fabrication processes of smart textile components, functional devices, system architectures and heterogeneous integration, wearable applications in human and nonhuman‐related areas, and the safety and security of STIMES. The major types of textile‐integrated nonconventional functional devices are discussed in detail: sensors, actuators, displays, antennas, energy harvesters and their hybrids, batteries and supercapacitors, circuit boards, and memory devices.

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“…Carbon nanotubes (CNT) are well-known for their outstanding mechanical and electrical properties, and it has been demonstrated that twist-spun multiwalled carbon nanotubes (MWCNTs) with filled hosts can provide rapid contraction and rotary motion under different stimuli which exceed the performance of conventional artificial muscles [102,103].…”

Section: Actuators Inspired From Towel Gourd Tendrilsmentioning

confidence: 99%

Helical Actuators Inspired by Chiral Seedpod Opening and Tendril Coiling

Wan¹,

Jin²,

Trase³

et al. 2018

Preprint

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Actuators are essential components for intelligent machines that can fulfill certain tasks in response to environmental stimuli. In recent years, actuators that can transform from a 2D ribbon shape to a 3D helical configuration under certain external stimuli have attracted significant attention due to the potential applications of the targeted helical structures in springs, propulsion generation, and artificial muscles. Inspired by the chiral opening of Bauhinia variegate‘s seedpods and the coiling of the Towel Gourd tendril with perversions, researchers have made significant breakthroughs in synthesizing state-of-the-art actuators capable of mimicking helical transformations. In this review, we give a brief overview of the shape evolution mechanisms of these two plant structures and then review recent progress in the fabrication of biomimetic helical actuators. These structures are categorized by the stimuli-responsive materials involved, including hydrogels, liquid crystal networks/elastomers, shape memory polymers, and multiwall carbon nanotubes. By providing this survey on important recent advances along with our perspectives, we hope to solicit new inspirations and insights on the development and fabrication of smart actuators, as well as the future development of interdisciplinary research at the interface of physics, engineering, and biology.

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Bio-inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles

Cited by 75 publications

References 28 publications

New twist on artificial muscles

New twist on artificial muscles

Smart Textile‐Integrated Microelectronic Systems for Wearable Applications

Helical Actuators Inspired by Chiral Seedpod Opening and Tendril Coiling

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