Multifunctional Soft Actuators Based on Anisotropic Paper/Polymer Bilayer Toward Bioinspired Applications

Hu, Ying; Ao, Xu; Liu, Jiaqin; Yang, Lulu; Chang, Longfei; Huang, Majing; Gu, Weibing; Wu, Guan; Lü, Ping; Chen, Wei; Wu, Yucheng

doi:10.1002/admt.201800674

Cited by 42 publications

(44 citation statements)

References 47 publications

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“…Elastomers [37][38][39], resin [40,41], SMP (MPCL) [42], other polymer [43], paper [43,44], micro-and nanofillers [45] Swelling Hydrogels [46][47][48][49][50], paper [43], LCN [51], SMP [48,[52][53][54][55], cross-linked PCL [56], other polymers [43,[57][58][59][60][61][62][63][64]…”

Section: Thermal Expansionmentioning

confidence: 99%

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Programmable Stimuli-Responsive Actuators for Complex Motions in Soft Robotics: Concept, Design and Challenges

et al. 2020

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During the last years, great progress was made in material science in terms of concept, design and fabrication of new composite materials with conferred properties and desired functionalities. The scientific community paid particular interest to active soft materials, such as soft actuators, for their potential as transducers responding to various stimuli aiming to produce mechanical work. Inspired by this, materials engineers today are developing multidisciplinary approaches to produce new active matters, focusing on the kinematics allowed by the material itself more than on the possibilities offered by its design. Traditionally, more complex motions beyond pure elongation and bending are addressed by the robotics community. The present review targets encompassing and rationalizing a framework which will help a wider scientific audience to understand, sort and design future soft actuators and methods enabling complex motions. Special attention is devoted to recent progress in developing innovative stimulus-responsive materials and approaches for complex motion programming for soft robotics. In this context, a challenging overview of the new materials as well as their classification and comparison (performances and characteristics) are proposed. In addition, the great potential of soft transducers are outlined in terms of kinematic capabilities, illustrated by the related application. Guidelines are provided to design actuators and to integrate asymmetry enabling motions along any of the six basic degrees of freedom (translations and rotations), and strategies towards the programming of more complex motions are discussed. As a final note, a series of manufacturing methods are described and compared, from molding to 3D and 4D printing. The review ends with a Perspectives section, from material science and microrobotic points of view, on the soft materials’ future and close future challenges to be overcome.

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Section: Thermal Expansionmentioning

confidence: 99%

“…Among them, elastomers [37][38][39], resins [40,41] or other polymers [43] have been reported. Paper is commonly used to add asymmetry to the design [43,44] (Section 2.4). Alternatively, SMP materials, detailed in Section 2.3.1, can be used as thermally expansive materials [42].…”

Section: Soft Isotropic Transducersmentioning

confidence: 99%

Programmable Stimuli-Responsive Actuators for Complex Motions in Soft Robotics: Concept, Design and Challenges

et al. 2020

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“…Reproduced with the permission of 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. (F) Electrically driven paper-based bilayer actuator (Hu et al, 2019). Reproduced with the permission of 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.…”

Section: Shape-changing Structuresmentioning

confidence: 99%

“…As shown in Figure 8E, the 3D-printed starfish soft robot can realize swimming and wrapping motions under the guidance of magnetic fields. Inspired by the moisture induced deformation of the pine cone, the electrically driven paper-based bilayer actuator is fabricated by a simple and scalable screen-printing method (Hu et al, 2019), as shown in Figure 8F. In the paper-based actuator, the polymer and silver nanoparticles are the deformation active units and energy conversion components, respectively.…”

Section: Shape-changing Structuresmentioning

confidence: 99%

Recent Progress in 3D Printing of Bioinspired Structures

Wang

Chen

2020

Front. Mater.

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Over millions of years of evolution, species in nature have gradually adopted biostructures. These structures have specific mechanical, hydrodynamic, optical, and electrical properties, which provide humans with valuable abilities to design and fabricate high-performance components and devices. However, traditional fabrication technologies cannot accurately reproduce or imitate the complicated and exquisite bioinspired structures, which restrict the development and application of biomimetic study. Due to the emergence and development of 3D printing technologies, more bioinspired structures can now be designed and fabricated. Recent progress in the 3D printing of structures inspired by species in nature, such as springtails, filefish, abalone shell, conch shell, wheat awn, plant stem, and wood, are reviewed in this paper, which also discusses current challenges and potential future developments in 3D printing for bioinspired structures.

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“…Besides biomimetic hydrostats that rely on exertion of hydraulic pressure on relatively inextensible boundaries, liquid movement can induce motion via other biomimetic mechanisms such as swelling. Actuators based on swelling of hygroscopic materials exposed to humidity gradients (Shin et al, 2018;Hu et al, 2019) provide straightforward and biomimetic design and utilize abundant biomaterials as well as humidity as the energy source, yet suffer in control challenges. A practical, micro-scale liquid-pumping solution is needed.…”

Section: Introductionmentioning

confidence: 99%

An All-Textile Non-muscular Biomimetic Actuator Based on Electrohydrodynamic Swelling

Uduste

Kaasik

Johanson

et al. 2020

Front. Bioeng. Biotechnol.

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Mass transfer from one part of an organism to another constitutes a fundamental non-muscular movement strategy in living organisms, in particular in plants. The demonstrable simplicity and safety make non-muscular actuators especially attractive for distributed configurations such as in wearable robotic applications on a textile platform. However, practical arrangements for integrating actuators as inherent parts of textiles is an ongoing challenge. Here we demonstrate an electrohydrodynamic ionic actuator that combines two textiles of natural origin. The first textile-viscose-rayonderived activated carbon cloth-consists of high-surface-area monolithic fibers that provide electrical and mechanical integrity, whereas the other textile-silk-contributes to mechanical integrity in the lateral direction while preventing the conductive textiles from contacting. By injecting an electronic charge into the activated carbon cloth electrodes, the migration of the electrolyte ions is initiated in the porous network inbetween the electrodes, causing non-uniform swelling and eventually bending of the laminate. The three-layer laminate composed of integral textile fibers demonstrated a ∼0.8% strain difference. Electrical control over a fluid movement in a textile platform provides a scalable method for functional textiles not limited to actuation.

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Multifunctional Soft Actuators Based on Anisotropic Paper/Polymer Bilayer Toward Bioinspired Applications

Cited by 42 publications

References 47 publications

Programmable Stimuli-Responsive Actuators for Complex Motions in Soft Robotics: Concept, Design and Challenges

Programmable Stimuli-Responsive Actuators for Complex Motions in Soft Robotics: Concept, Design and Challenges

Recent Progress in 3D Printing of Bioinspired Structures

An All-Textile Non-muscular Biomimetic Actuator Based on Electrohydrodynamic Swelling

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