A Study on the Twisted and Coiled Polymer Actuator with Strain Self-Sensing Ability

ACS Applied Materials & Interfaces
Pengfei ZhaoHualing Chen

Abstract

Twisted and coiled polymer actuators (TCA) are a kind of efficient artificial muscles, which have good prospects for application in soft robots, bionic devices, biological and medical, and other high-tech field. However, the inability to dynamically sense and adjust the strain of the actuator will lead to uncertainty in the accuracy of deformation and strain, resulting in imprecise target action. Herein, twisted and coiled polymer actuators with strain self-sensing ability (TCASA) are prepared by integrating the stretchable optomechanical film (SOMF) sensors into TCA, which provides a simple strategy for dynamically strain sensing. These stretchable optomechanical films have a wide range of color change during deformation of TCA and the strain is perceived by observing the color change according to the corresponding relationship between color change and strain. Furthermore, the proposed TCASA maintain excellent cycling stability of strain self-sensing during cyclic tests (200 cycles), and they maintain excellent strain self-sensing performance to perform strain control compared TCA without SOMF. The results indicate that the proposed structure is a promising soft actuator with excellent strain self-sensing ability, which is wel...Continue Reading

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