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Bionic Polyurethane with a Reversible Core-Sheath for Real-Time On-Demand Performance Adjustment and Fluorescence

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Summary

Researchers developed a novel polyurethane material that changes its strength on demand using UV light. This smart material offers adjustable performance and visual feedback, simplifying advanced material applications.

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adjustable performancecore−sheath structuredynamic covalent reactionfluorescence self-reflectionspatiotemporally controllable

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Smart Materials

Background:

  • Smart materials responding to stimuli are advancing, but on-demand adjustable performance remains limited.
  • Existing materials often require harsh conditions (high temperature, catalysts) and irreversible changes.

Purpose of the Study:

  • To develop a novel polyurethane with adjustable performance and fluorescence self-reflection.
  • To create a catalyst-free, on-demand material intervention system inspired by nature.

Main Methods:

  • Incorporation of anthracene as a dynamic group in polyurethane.
  • Utilizing UV light to induce topological isomerization and form a reversible core-sheath structure.
  • Developing fluorescence self-reflection for visual performance feedback.

Main Results:

  • Achieved catalyst-free, spatiotemporally controlled performance adjustment via UV exposure.
  • Demonstrated real-time, on-demand strength enhancement and spatial stiffening.
  • Successfully visualized material performance through fluorescence self-reflection.

Conclusions:

  • The novel anthracene-functionalized polyurethane offers simplified, reversible performance adjustment.
  • The material's tunable properties and visual feedback expand applications in intelligent systems.
  • This work paves the way for versatile intelligent materials like artificial muscles and 4D printing.