Peptidoglycan-inspired autonomous ultrafast self-healing bio-friendly elastomers for bio-integrated electronics

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Elastomers are crucial for stretchable electronics in bio-integrated devices.
• Existing elastomers often lack self-healing, biodegradability, and biocompatibility.
• Mechanical damage resistance and human body compatibility are key requirements.

Purpose of the Study:

• To design and synthesize novel room-temperature autonomous self-healing elastomers.
• To create elastomers that are biodegradable and biocompatible for bio-integrated applications.
• To develop materials with tunable mechanical properties inspired by biological structures.

Main Methods:

• Inspired by peptidoglycan, a novel elastomer, poly(sebacoyl 1,6-hexamethylenedicarbamate diglyceride) (PSeHCD), was synthesized.
• The elastomer's structure features alternating ester-urethane moieties and bionic hybrid crosslinking.
• Characterization included assessment of self-healing speed, mechanical properties, biocompatibility, and biodegradability.

Main Results:

• PSeHCD elastomers exhibit ultrafast autonomous self-healing at room temperature (21 seconds for conductive applications).
• Tunable, biomimetic mechanical properties and facile reprocessability were achieved.
• Demonstrated good biocompatibility and biodegradability, crucial for medical applications.
• Successfully applied as a super-fast self-healing stretchable conductor and motion sensor.

Conclusions:

• The developed PSeHCD elastomers represent the first room-temperature autonomous self-healing, biodegradable, and biocompatible materials.
• This work introduces a new design and synthetic principle for advanced elastomers in bio-integrated electronics.
• The material's properties show significant potential for next-generation wearable and implantable devices.