Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

12 Scopus Citations
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Author(s)

  • Ziheng Zhang
  • Bo Zhu
  • Rong Yin
  • Ray H. Baughman
  • Xiaoming Tao

Detail(s)

Original languageEnglish
Article number2000329
Journal / PublicationAdvanced Materials Technologies
Volume5
Issue number9
Online published1 Jul 2020
Publication statusPublished - Sep 2020
Externally publishedYes

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.

Citation Format(s)

Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature. / Zhang, Ziheng; Zhu, Bo; Peng, Zehua et al.

In: Advanced Materials Technologies, Vol. 5, No. 9, 2000329, 09.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review