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Universally autonomous self-healing elastomer with high stretchability.

Hongshuang Guo1,2,3, Yi Han4, Weiqiang Zhao1,2,3

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This study introduces a new self-healing elastomer that is highly stretchable and repairs autonomously under diverse harsh conditions. This breakthrough material offers potential for advanced electronic skin applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Developing autonomous self-healing materials for extreme environments is difficult due to reconstruction resistance.
  • Existing materials often fail to maintain integrity and functionality under harsh conditions.

Purpose of the Study:

  • To design a universally self-healing and highly stretchable supramolecular elastomer.
  • To overcome limitations of current self-healing materials in challenging applications.

Main Methods:

  • Synergistically incorporating multi-strength hydrogen bonds and disulfide metathesis into polydimethylsiloxane polymers.
  • Utilizing dynamic interactions of H-bonds and disulfide bonds for material reconstruction.

Main Results:

  • Achieved high stretchability (14000% unnotched, 1300% notched).
  • Demonstrated fast autonomous self-healing across various conditions: room temperature, -40°C, underwater, supercooled saltwater, and extreme pH.
  • Reported high healing efficiencies (e.g., 93% underwater, 89% in saltwater, 88% in acid, 84% in alkali).

Conclusions:

  • The developed supramolecular elastomer exhibits exceptional self-healing and stretchability.
  • Its robust performance in harsh conditions opens new avenues for electronic skin and other advanced material applications.