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Antifreezing and Stretchable Organohydrogels as Soft Actuators
Yukun Jian1,2, Baoyi Wu1, Xiaoxia Le1,2
1Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Research (Washington, D.C.)
|January 9, 2020
Summary
Researchers developed novel antifreeze organohydrogel actuators inspired by nature. These actuators can deform at subzero temperatures and have applications in robotics and flexible electronics.
Area of Science:
- Materials Science
- Polymer Chemistry
- Robotics
Background:
- Living organisms exhibit remarkable freezing tolerance.
- Developing materials that function at subzero temperatures is challenging.
- Hydrogel actuators offer potential for soft robotics and adaptive devices.
Purpose of the Study:
- To create novel antifreeze organohydrogel actuators.
- To achieve shape deformation capabilities at subzero temperatures.
- To explore applications in robotics and flexible electronics.
Main Methods:
- Constructed a bilayer hydrogel using polyacrylamide (PAAm) and pH-responsive polyacrylic acid (PAA).
- Incorporated a mixed solvent of water and glycerol to impart antifreeze properties.
- Introduced KI into glycerol-based organogel to create flexible conductors.
Main Results:
- Achieved organohydrogel actuators with shape deformation at subzero temperatures.
- Demonstrated tunable actuating speed by adjusting temperature and glycerol/water ratio.
- Developed flexible conductors with stable sensing performance from -30°C to 60°C.
- Showcased applications including a weightlifting robot, artificial valve, and robotic arm.
Conclusions:
- The developed organohydrogel actuators exhibit excellent antifreeze properties and tunable performance.
- The materials show promise for applications in extreme temperature environments.
- The study expands the utility of hydrogel-based actuators and flexible electronics.
