Environmentally Stable, Robust, Adhesive, and Conductive Supramolecular Deep Eutectic Gels as Ultrasensitive Flexible...

Area of Science:

• Materials Science
• Polymer Chemistry
• Sensor Technology

Background:

• Flexible temperature sensors require high mechanical performance, environmental stability, and sensitivity.
• Developing novel materials is crucial for advancing sensor technology.

Purpose of the Study:

• To design and prepare polymerizable deep eutectic gels for flexible temperature sensing applications.
• To investigate the mechanical, thermal, and self-healing properties of the synthesized gels.

Main Methods:

• Synthesized supramolecular deep eutectic gels by mixing N-cyanomethyl acrylamide (NCMA) and lithium bis(trifluoromethane) sulfonimide (LiTFSI).
• Utilized reversible amide hydrogen bonds and cyano-cyano dipole-dipole interactions for gel network formation.
• Fabricated a wireless temperature monitor using the polyNCMA/LiTFSI gel.

Main Results:

• The supramolecular gels exhibited excellent mechanical properties (12.9 MPa tensile strength, 45.3 kJ m⁻² fracture energy), strong adhesion, and self-healing.
• The gels demonstrated good environmental stability, 3D printability, and high-temperature responsiveness.
• The developed wireless temperature monitor showed high thermal sensitivity (8.4%/K) over a wide detection range.

Conclusions:

• Polymerizable deep eutectic gels offer a promising platform for high-performance flexible temperature sensors.
• The materials exhibit versatile properties suitable for advanced electronic applications, including potential use as pressure sensors.