Functional fibers for robotic fabrics

Buckner, Trevor L.; Kramer‐Bottiglio, Rebecca

doi:10.1088/2399-7532/aad378

Cited by 34 publications

(20 citation statements)

References 92 publications

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“…This overview of material‐based mechanisms is by no means comprehensive of all soft actuators or artificial muscles; instead, it is specific to those implemented in fibers that have been demonstrated in textiles (e.g., that can be formed in lengths possible for textile structuring). Additional perspectives on active yarns and artificial muscles for robotics can be found in the following review articles: [ 378 ] covers artificial muscles, while [ 379 ] provides more literature on active fiber‐based materials, and [ 380 ] specifically details more information on active fibers used in textile actuators. Last, a general overview on textile‐based actuators which is mostly focused on the active materials approach has been written by Persson and colleagues.…”

Section: Textile Actuators For Wearable Robotsmentioning

confidence: 99%

Textile Technology for Soft Robotic and Autonomous Garments

Sánchez¹,

Walsh²,

Wood³

2020

Adv Funct Materials

167

123

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Textiles have emerged as a promising class of materials for developing wearable robots that move and feel like everyday clothing. Textiles represent a favorable material platform for wearable robots due to their flexibility, low weight, breathability, and soft hand‐feel. Textiles also offer a unique level of programmability because of their inherent hierarchical nature, enabling researchers to modify and tune properties at several interdependent material scales. With these advantages and capabilities in mind, roboticists have begun to use textiles, not simply as substrates, but as functional components that program actuation and sensing. In parallel, materials scientists are developing new materials that respond to thermal, electrical, and hygroscopic stimuli by leveraging textile structures for function. Although textiles are one of humankind's oldest technologies, materials scientists and roboticists are just beginning to tap into their potential. This review provides a textile‐centric survey of the current state of the art in wearable robotic garments and highlights metrics that will guide materials development. Recent advances in textile materials for robotic components (i.e., as sensors, actuators, and integration components) are described with a focus on how these materials and technologies set the stage for wearable robots programmed at the material level.

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Section: Textile Actuators For Wearable Robotsmentioning

confidence: 99%

Textile Technology for Soft Robotic and Autonomous Garments

Sánchez¹,

Walsh²,

Wood³

2020

Adv Funct Materials

167

123

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“…Chemical coatings and additive manufacturing techniques have been shown to be effective methods of imbuing a passive textile with active characteristics. [ 15,16,23,56–59 ]…”

Section: Resultsmentioning

confidence: 99%

Kinetically Tunable, Active Auxetic, and Variable Recruitment Active Textiles from Hierarchical Assemblies

Granberry

Barry

Holschuh

et al. 2021

Adv Materials Technologies

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Multifunctional textiles with programmable, multi‐axial, distributed, and scalable actuation are highly desirable and presently unrealized. 1D torque‐unbalanced active yarns within 2D textile structures are exploited to produce soft and scalable active textiles that exhibit tunable displacements, forces, stiffnesses, and kinematic deformations. Through a textile hierarchy spanning active material composition, yarn construction, textile geometry, and system architecture, these active textiles accomplish kinetic tunability, variable recruitment behaviors, and auxetic effects without mechanical contact, called active auxetic effects. New modes of pre‐programmed multi‐axial performance are enabled by geometrically manipulating—specifically pre‐stressing and constraining—active filaments in torsion and leveraging their structural elastic instability within a textile geometry. The new kinematic motion afforded by torque‐unbalanced active yarns enhances the performance of active textiles, which accomplish tensile strokes over 40%, generated blocked forces up to 308 N m−1, and specific work over 0.4. kJ kg−1. Advances in active textiles are demonstrated through multifunctional 3D applications, including a variable constriction pump that exhibits sequential actuation, a wearable that conforms multi‐axially around the body, and a soft exoskeleton that performs assistive motions and on‐body anchoring simultaneously. By harnessing the capabilities of active materials within a textile hierarchy, advances in the potentiality of multifunctional textiles are presented.

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“…The major contribution to this negative thermal expansion is presumed to come from the amorphous matrix and alpha-helices along the path of the macroscopic twist ( Figure 2 d). It was discovered that the tension force for wools in the twisted structure was much lower than that of the parallel one, indicating that the stiffness of the sample could be effectively decreased through twisting, hence allowing more conformational freedom [ 26 ]. As a result, the conformational entropy change will occur during heating like rubber elasticity and then the contractive force can be produced.…”

Section: Resultsmentioning

confidence: 99%

Multi-Modal Contractive Forces of Wools as Actuator

Zhu

2020

Polymers

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Wool has a long history of use in textiles throughout human civilization. Many smart functions such as reversible shape changes to various stimuli have been demonstrated in the last few years. However, the force-related characteristics are still imperfectly recognized, although they are expected to be used as actuators due to their biological origins and broad applications. Herein, we investigated the feasibility of wools in performing actuating ability through its intrinsic structures and fabrication methods. The diverse modes of contractive forces were obtained in wool materials including platform-like, double-peak, and slope-like shapes, where a molecular model was also presented to trace the origins of stress evolution. After that, a polymeric blend was created to modify the wool materials and a dissimilar performance of stress production was achieved, a square stress mode with stable manner and maintenance, for broad applications in a more efficient way. It is believed that these actuating properties extracted from natural hairs have a large potential in current smart applications and lay down new inspiration in designing actuators.

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Functional fibers for robotic fabrics

Cited by 34 publications

References 92 publications

Textile Technology for Soft Robotic and Autonomous Garments

Textile Technology for Soft Robotic and Autonomous Garments

Kinetically Tunable, Active Auxetic, and Variable Recruitment Active Textiles from Hierarchical Assemblies

Multi-Modal Contractive Forces of Wools as Actuator

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