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Sheath-run artificial muscles
Jiuke Mu1, Mônica Jung de Andrade1, Shaoli Fang1
1Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX 75080, USA.
Science (New York, N.Y.)
|July 13, 2019
Summary
New sheath-run artificial muscles offer superior performance and efficiency compared to traditional guest-filled designs. This innovation in artificial muscle technology promises significant advancements in robotics and prosthetics.
Area of Science:
- Materials Science
- Mechanical Engineering
- Biomimetics
Background:
- Guest-filled carbon nanotube yarns are effective artificial muscles but are costly.
- Limited actuation efficiency in guest-filled designs restricts performance.
Purpose of the Study:
- To develop a novel artificial muscle design with enhanced performance and efficiency.
- To investigate the potential of sheath-run artificial muscles as a superior alternative.
Main Methods:
- Designing and fabricating sheath-run artificial muscles with twisted or coiled inexpensive yarn cores.
- Evaluating tensile and electrochemical performance under various actuation methods (electrothermal, vapor absorption).
Main Results:
- Sheath-run muscles demonstrated increased work capacity by 1.70 to 2.15 times for tensile applications.
- Electrochemical sheath-run muscles achieved 1.98 W/g contractile power, significantly outperforming human and alternative muscles.
Conclusions:
- Sheath-run artificial muscles provide a significant performance upgrade over guest-filled designs.
- The new design offers higher work capacity and power output, validated by theoretical predictions.
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