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Title: | Programmable and thermally hardening composite yarn actuators with a wide range of operating temperature | Authors: | Zhang, Z Zhu, B Peng, Z Yin, R Baughman, RH Tao, X |
Issue Date: | Sep-2020 | Source: | Advanced materials technologies, Sept. 2020, v. 5, no. 9, 2000329, p. 1-10 | Abstract: | Actuators have wide applications in intelligent robots, deformable textiles, and wearable devices, wherein the fiber-based coiled linear actuators are particularly advantageous due to their good flexibility, high stress, and strain. However, their performances have been limited by the employed materials, whose microstructures are not easily designed and controlled. This article proposes a new approach of engineered composite yarns for the actuators. It leads to novel solutions to overcome these difficulties by offering wide design options in material properties and device structures. Here, an engineering design of programmable and thermally-hardening helical composite yarn actuators (HCYAs) with a wide range of operating temperature is exemplified. Polyimide (PI) and polydimethylsiloxane (PDMS) are selected to fabricate HCYAs, achieving tensile actuation of 20.7% under 1.2 MPa from −50 °C to 160 °C and competitive specific work (158.9 J kg-1, four times of natural muscle). With constant tensile deformation, PI/PDMS HCYA nearly tripled the stress from 20 °C to 100 °C. Moreover, it is surprisingly observed an unusual thermal-hardening phenomenon that the tensile stiffness of the PI/PDMS HCYAs increases with the rise of temperature. Equipped by electrothermally powered PI/Cu/PDMS HCYAs, robotic hands and pressure-tunable compressive bandage are demonstrated for their potential applications in robots and wearable devices. | Keywords: | Fiber composites Linear actuators Polyimide Thermal hardening |
Publisher: | Wiley | Journal: | Advanced materials technologies | ISSN: | 2365-709X | DOI: | 10.1002/admt.202000329 | Rights: | © 2020 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is the peer reviewed version of the following article: Zhang, Z., Zhu, B., Peng, Z., Yin, R., Baughman, R. H., Tao, X., Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature. Adv. Mater. Technol. 2020, 5, 2000329, which has been published in final form at https://doi.org/10.1002/admt.202000329. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Appears in Collections: | Journal/Magazine Article |
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Zhang_Programmable_Thermally_Hardening.pdf | Pre-Published version | 2.47 MB | Adobe PDF | View/Open |
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