3D Antidrying Antifreezing Artificial Skin Device with Self-Healing and Touch Sensing Capability

Area of Science:

• Materials Science
• Robotics
• Biomedical Engineering

Background:

• Hydrogels offer flexibility and biocompatibility for electronic skin (e-skin) devices.
• Current e-skin devices are limited to simple structures and face operational challenges due to drying and freezing.
• Developing 3D e-skin with enhanced stability for practical applications is crucial.

Purpose of the Study:

• To demonstrate 3D artificial skin devices with improved stability, addressing drying and freezing limitations.
• To fabricate target-oriented 3D e-skin structures using advanced printing techniques.
• To enhance the operational capability of e-skin devices in diverse environmental conditions.

Main Methods:

• Fabrication of 3D artificial skin devices using extrusion-based 3D printing.
• Development of an organohydrogel via solvent displacement with ethylene glycol for enhanced stability.
• Testing of material properties including drying resistance (>1000 h) and freezing resistance (down to -60 °C).

Main Results:

• The developed organohydrogel exhibits excellent drying and freezing resistance while maintaining self-healing properties.
• 3D printed artificial skin devices demonstrate stable operation over time and under freezing conditions.
• The devices enable accurate touchpoint positioning on complex 3D structures, even below 0 °C, without compromising flexibility.

Conclusions:

• Organohydrogels significantly improve the stability and operational range of 3D artificial skin devices.
• 3D printing enables the creation of complex, functional e-skin for targeted applications.
• These advancements pave the way for robust and versatile e-skin technologies in extreme environments.