Tough and Highly Efficient Underwater Self-Repairing Hydrogels for Soft Electronics

Area of Science:

• Materials Science
• Polymer Chemistry
• Soft Electronics

Background:

• Hydrogel electronics are vulnerable to mechanical damage.
• Developing self-repairing hydrogels for underwater applications with robust mechanical properties is challenging.

Purpose of the Study:

• To design a tough, highly efficient underwater self-repairing supramolecular hydrogel.
• To investigate its potential for soft electronic sensors and underwater communication.

Main Methods:

• Synergistically combining weak hydrogen bonds and strong dipole-dipole interactions.
• Fabricating a supramolecular hydrogel with enhanced mechanical and self-healing properties.

Main Results:

• The hydrogel exhibits high stretchability (700%) and toughness (4.45 MJ m⁻³).
• Achieved nearly 100% strain self-recovery in 10 minutes and 98% underwater self-repair efficiency in 1 hour.
• Demonstrated functionality as underwater electronic sensors for physiological signals and communication.

Conclusions:

• The developed supramolecular hydrogel offers a promising solution for durable underwater electronic applications.
• Its autonomous underwater self-repair capability ensures continued function after damage.