Fast gelling, high performance MXene hydrogels for wearable sensors

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Hydrogel-based functional materials are crucial for AI, soft robotics, and motion monitoring.
• Traditional hydrogel synthesis via free radical polymerization often requires harsh conditions (heating, light), hindering practical use.

Purpose of the Study:

• To develop a rapid, room-temperature gelation method for conductive hydrogels.
• To create a dual-network hydrogel composite with enhanced properties for wearable applications.

Main Methods:

• Incorporation of reductive MXene sheets and metal ions into a chitosan network.
• Induction of rapid polyacrylamide network formation within seconds (10 s) at room temperature.
• Characterization of the resulting dual-network MXene-crosslinked conductive hydrogel composite.

Main Results:

• Achieved rapid gelation at room temperature in 10 seconds.
• The hydrogel composite exhibited exceptional stretchability (1350%) and low dissipated energy (0.40 kJ m⁻³).
• Demonstrated high sensitivity (GF = 2.86) and strong adhesion for reliable motion detection.

Conclusions:

• The developed method offers a simple and direct approach for synthesizing advanced conductive hydrogels.
• The material shows significant potential for wearable health-monitoring electronic systems.
• This work enables the development of integrated systems for detecting diverse human motions.