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Formulation of Zinc-Based Nanomaterials using the Eucommia ulmoides Bark Extract and their Wound Healing Potential
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Ultrarobust subzero healable materials enabled by polyphenol nano-assemblies.

Nan Wang1, Xin Yang1, Xinxing Zhang2

  • 1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065, Chengdu, China.

Nature Communications
|February 13, 2023
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Summary
This summary is machine-generated.

Researchers developed a new glassy polymer that can self-heal even at subzero temperatures. This ultrarobust material shows improved adhesion and mechanical properties for applications in cold environments.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Self-healing materials are crucial for advanced applications like wearable electronics and soft robots.
  • Achieving self-healing in glassy polymers at subzero temperatures is challenging due to frozen interactions.

Purpose of the Study:

  • To develop an ultrarobust, subzero healable glassy polymer.
  • To overcome the limitations of conventional dynamic cross-linking for low-temperature self-healing.

Main Methods:

  • Incorporation of polyphenol nano-assemblies with numerous end groups into polymerizable deep eutectic solvent elastomers.
  • Utilizing multiple dynamic bonds and rapid secondary relaxations with low activation energy.

Main Results:

  • Achieved a 30-fold increase in adhesion force at low temperatures.
  • Exhibited excellent mechanical properties (30.6 MPa) and high subzero healing efficiency (85.7% at -20°C).
  • Demonstrated reliable cryogenic strain-sensing and functional-healing capabilities.

Conclusions:

  • The developed glassy polymer offers a viable approach for ultrarobust subzero self-healing.
  • The material is suitable for applications in winter sports wearables, subzero robots, and artificial muscles.