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Updated: Aug 11, 2026

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Cardiac Muscle-cell Based Actuator and Self-stabilizing Biorobot - PART 1
Published on: July 11, 2017
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Artificial muscles from fishing line and sewing thread
Carter S Haines1, Márcio D Lima, Na Li
1The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA.
Summary
Researchers created inexpensive, high-performance artificial muscles from common polymer fibers. These artificial muscles offer high strength, long life, and fast actuation for diverse applications.
Area of Science:
- Materials Science
- Robotics
- Polymer Science
Background:
- High cost and performance limitations of current artificial muscles restrict their widespread application.
- Existing artificial muscles suffer from low cycle life, hysteresis, and poor efficiency.
Purpose of the Study:
- To develop inexpensive, high-performance artificial muscles from readily available materials.
- To demonstrate the potential of polymer fibers for creating scalable, efficient artificial muscles.
Main Methods:
- Transformation of inexpensive high-strength polymer fibers (fishing line, sewing thread) through twist insertion.
- Fabrication of coiled artificial muscles via extreme twisting.
- Theoretical and experimental analysis of actuation mechanisms.
Main Results:
- Demonstrated artificial muscles with fast, scalable, nonhysteretic, and long-life tensile and torsional actuation.
- Achieved 49% contraction, lifting loads over 100 times heavier than human muscle.
- Generated 5.3 kW/kg mechanical power output, comparable to jet engines.
- Showcased applications in temperature-responsive textiles and energy-conserving window shutters.
- Confirmed large-stroke tensile actuation results from torsional actuation.
Conclusions:
- Inexpensive polymer fibers can be transformed into high-performance artificial muscles.
- Twist insertion is an effective method for creating scalable and efficient artificial muscles.
- These novel artificial muscles have broad application potential in robotics, textiles, and energy conservation.
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