Toward Robust, Tough, Self-Healable Supramolecular Elastomers for Potential Application in Flexible Substrates

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Flexible electronic devices require robust, tough, and self-healable elastomer substrates.
• Existing materials often face a trade-off between mechanical strength and self-healing capabilities.
• Poly(dimethylsiloxane) (PDMS) is a common base for elastomers but requires enhancement for demanding applications.

Purpose of the Study:

• To develop a poly(dimethylsiloxane) (PDMS) supramolecular elastomer with enhanced mechanical properties and self-healing functionality.
• To investigate the use of metal-coordinated bonds to create a robust and tough elastomer.
• To explore the potential of this new elastomer as a substrate for flexible electronic devices.

Main Methods:

• Synthesized a supramolecular elastomer based on poly(dimethylsiloxane) (PDMS) utilizing metal-coordinated bonds.
• Characterized the mechanical properties, including robustness and fracture toughness, of the developed elastomer.
• Assessed the self-healing efficiency and temperature requirements through reversible intermolecular interactions.

Main Results:

• Achieved superior mechanical robustness of 2.81 MPa and impressive fracture toughness of 32 MJ/m³.
• Demonstrated efficient self-healing at moderate temperatures with a healing efficiency of up to 95%.
• The material's properties are attributed to strong metal-coordination complexes and reversible intermolecular interactions.

Conclusions:

• The developed poly(dimethylsiloxane) (PDMS) supramolecular elastomer successfully overcomes the trade-off between mechanical robustness and self-healing.
• The material exhibits excellent mechanical performance and rapid self-healing capabilities.
• This advanced elastomer shows significant potential as a substrate material for next-generation flexible electronic devices.