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10:32
Fabrication Process of Silicone-based Dielectric Elastomer Actuators
Published on: February 1, 2016
33.7K
Liquid-Free, Self-Repairable, Recyclable, and Highly Stretchable Colorless Solid Ionic Conductive Elastomers for
Wangyi Zeng1,2, Wenhao Yang1,2, Liang Chai1,2
1School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 27, 2023
Summary
This study introduces a new liquid-free ionic conductive elastomer (ICE-2) for flexible sensors. This material offers excellent mechanical properties, self-healing, and recyclability, enabling sensitive detection of human activities.
Area of Science:
- Materials Science
- Polymer Chemistry
- Sensor Technology
Background:
- Hydrogels and ionogels face challenges with liquid leakage and evaporation, limiting their use in flexible ionic sensors.
- Solid-state ionic conductive elastomers (ICEs) offer a promising alternative due to their inherent stability and mechanical properties.
Purpose of the Study:
- To synthesize and characterize a novel liquid-free ionic conductive elastomer (ICE-2) based on polyurethane (PU).
- To evaluate the potential of ICE-2 as a material for advanced flexible ionic sensors capable of detecting various stimuli.
Main Methods:
- Synthesis of a liquid-free ionic polyurethane (PU) type conductive elastomer (ICE-2) utilizing microphase separation.
- Characterization of ICE-2's ionic conductivity, optical transparency, mechanical properties (tensile strength, elongation at break, fracture energy), self-healing efficiency, environmental stability, and recyclability.
- Fabrication and testing of a sensor using ICE-2 to assess its performance in detecting temperature changes and human activities.
Main Results:
- ICE-2 demonstrated good ionic conductivity (2.86×10-6 S/cm) and high transparency (>89%).
- The elastomer exhibited excellent mechanical properties, including a tensile strength of 3.06 MPa, elongation at break of 1760%, and fracture energy of 14.98 kJ/m2.
- Appreciable self-healing (>90% efficiency), environmental stability, and recyclability were observed. The sensor successfully detected temperature variations and human movements like joint motion and micro-expressions.
Conclusions:
- The synthesized ICE-2 is a versatile, liquid-free ionic conductive material suitable for flexible sensors.
- The material's robust mechanical properties, self-healing capability, and sensitive detection performance highlight its potential for human-machine interfaces and wearable electronics.
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