Electroactive Artificial Muscles Based on Functionally Antagonistic Core-Shell Polymer Electrolyte Derived from...

Area of Science:

• Materials Science
• Polymer Chemistry
• Robotics

Background:

• Electroactive ionic soft actuators are crucial for bioinspired soft robotics, wearable electronics, and biomedical devices.
• Developing efficient polymer electrolytes for ion migration remains a key challenge for high-performance actuators.

Purpose of the Study:

• To design and synthesize a novel block copolymer for an ionic soft actuator with enhanced performance.
• To investigate the actuation capabilities and durability of the new ionic soft actuator.

Main Methods:

• Synthesis of polystyrene-b-poly(1-ethyl-3-methylimidazolium-4-styrenesulfonate) (PS-b-PSS-EMIm) block copolymer.
• Fabrication of an ionic soft actuator with a core-shell architecture utilizing the synthesized polymer electrolyte.
• Characterization of actuation performance (displacement, voltage, response time) and durability (cycle testing).

Main Results:

• The ionic soft actuator demonstrated a high displacement of 8.22 mm at an ultralow voltage of 0.5 V.
• Achieved a fast rise time of 5 seconds and exceptional durability exceeding 14,000 cycles.
• The novel block copolymer electrolyte with a core-shell architecture enabled superior performance.

Conclusions:

• The developed ionic soft actuator exhibits excellent performance, meeting key requirements for advanced applications.
• This work provides a new polymer electrolyte design strategy for high-performance ionic soft actuators.
• The methodology can be extended to develop electrolytes for solid-state lithium batteries and fuel cells.