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High-Strength, Recyclable Multifunctional Elastomer with a Dynamic Covalent Supramolecular Network.

Shuping Sun1, Xiaodong Li1, Jialu Shang1

  • 1Beijing Institute of Technology, Haidian District, Beijing, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 17, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel supramolecular elastomer with Diels-Alder chemistry, offering superior mechanical strength, self-healing, and recyclability. The material also demonstrates antibacterial properties, making it ideal for advanced flexible electronics and medical applications.

Keywords:
diels‐alder reactionhydrogen bondsmulti‐functionalself‐healingself‐reinforcementsupramolecular elastomer

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomaterials

Background:

  • Developing advanced materials with integrated functionalities like mechanical strength, energy dissipation, recyclability, and antibacterial properties is crucial for flexible electronics and medical devices.
  • Existing material systems face challenges in balancing and integrating these diverse properties effectively.

Purpose of the Study:

  • To design and synthesize a novel supramolecular elastomer with a multiscale architecture.
  • To achieve a synergistic integration of mechanical robustness, self-healing, recyclability, and antimicrobial activity.
  • To explore the potential of this elastomer in cutting-edge applications.

Main Methods:

  • Fabrication of a supramolecular elastomer using a dynamic network based on the Diels-Alder reaction, UPy-grafted chitosan, and hydrogen-bonding interactions.
  • Characterization of mechanical properties, including tensile strength, elongation at break, and toughness.
  • Evaluation of self-healing capacity, recyclability, and antimicrobial performance.
  • Analysis of the strain-induced crystallization and gradient energy dissipation mechanisms.

Main Results:

  • The supramolecular elastomer exhibited a remarkable tensile strength of 49.75 MPa, an elongation at break of 1096.54%, and a toughness of 227.41 MJ·m-3 due to strain-induced crystallization.
  • The dynamic network facilitated efficient self-healing and closed-loop recyclability.
  • The material demonstrated inherent antimicrobial properties attributed to the chitosan component.
  • A gradient energy dissipation mechanism was analyzed and validated.

Conclusions:

  • The developed supramolecular elastomer successfully integrates excellent mechanical properties, energy dissipation, self-healing, recyclability, and antibacterial performance.
  • This innovative material design offers a promising platform for advanced, sustainable, and intelligent supramolecular elastomers.
  • The findings open new avenues for applications in flexible electronics and biomedical fields.