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A Metalgel with Liquid Metal Continuum Immobilized in Polymer Network.
Jiacheng Wang1, Tingting Ye1, Yiding Jiao1
1National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Chemistry and Biomedicine Innovation Centre, Collaborative Innovation Centre of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China.
Advanced Materials (Deerfield Beach, Fla.)
|October 25, 2024
Summary
Researchers developed a novel liquid metal-polymer gel ("metalgel") with high conductivity and softness. This durable material shows potential for advanced applications in electronics and bioengineering.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Gels are crucial materials formed by fluids within 3D polymer networks.
- Exploring novel fluids immobilized in polymer networks is key to unlocking advanced material properties.
Purpose of the Study:
- To introduce a new liquid metal-polymer gel material, termed "metalgel".
- To investigate the properties and potential applications of this novel material.
Main Methods:
- Development of metalgel using a fluid replacement strategy.
- Characterization of metalgel's electrical conductivity, mechanical softness, and gas permeability.
- Assessment of electrical stability under extreme deformation and environmental durability.
Main Results:
- Metalgel comprises 92.40% liquid metal fluid immobilized in a nanoscale polymer network.
- Achieved high electrical conductivity (3.18 × 10^6 S·m⁻¹), tissue-like softness (Young's modulus of 70 kPa), and low gas permeability (4.50 × 10⁻²² m²·s⁻¹·Pa⁻¹).
- Demonstrated exceptional electrical stability under extreme mechanical stress (e.g., truck compression) and 180-day environmental integrity.
Conclusions:
- The novel metalgel exhibits a unique combination of high conductivity, softness, and durability.
- Electrostatic interactions are key to immobilizing the high-volume-fraction liquid metal.
- Metalgel holds significant potential for applications in soft electromagnetic shielding, hermetic sealing, and bioelectronic devices.
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