Magnetic torsional actuation of carbon nanotube yarn artificial muscle

Duck Weon Lee; Shi Hyeong Kim; Mikhail E Kozlov; Xavier Lepró; Ray H Baughman; Seon Jeong Kim

doi:10.1039/c8ra01040d

Magnetic torsional actuation of carbon nanotube yarn artificial muscle

RSC Adv. 2018 May 11;8(31):17421-17425. doi: 10.1039/c8ra01040d. eCollection 2018 May 9.

Authors

Duck Weon Lee¹, Shi Hyeong Kim¹, Mikhail E Kozlov², Xavier Lepró², Ray H Baughman², Seon Jeong Kim¹

Affiliations

¹ Center for Self-Powered Actuation, Department of Biomedical Engineering, Hanyang University Seoul 04763 Korea sjk@hanyang.ac.kr.
² The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas Richardson TX 75083 USA.

Abstract

Magnetically driven torsional actuation of a multiwalled carbon nanotube (MWNT) yarn was realized by first biscrolling NdFeB magnetic particles into helical yarn corridors to make a magnetic MWNT yarn. The actuating device comprised a pristineMWNT yarn that was connected to the magnetic MWNT yarn, with a paddle attached between these yarns. The application of a magnetic field reversibly drove torsional actuation of up to 80° within ∼0.67 seconds. This magnetic actuator was remotely powered, and its actuation stroke was the same when the muscle array was at 20 °C and at -100 °C.