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Cocrystal effect-driven ultrafast phase-transition ionogel for dynamically switchable adhesion interfaces.

Yan Zheng1, Zhikai Dong1, Shaochuan Luo2,3,4

  • 1Department of Polymer Science and Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, China.

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|October 2, 2025
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Summary
This summary is machine-generated.

Researchers developed a smart ionogel material that rapidly switches adhesion strength and provides electrical feedback. This innovation enables dynamic adhesion for applications in flexible electronics and robotics.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Soft Robotics

Background:

  • Smart adhesion materials are crucial for dynamic interfaces in flexible electronics, soft robotics, and manufacturing.
  • A key challenge is balancing strong adhesion with switchable properties.

Purpose of the Study:

  • To develop a novel ionogel with tunable, switchable adhesion and integrated electrical feedback.
  • To investigate the structure-property relationships governing the material's phase transitions and adhesion characteristics.

Main Methods:

  • Synthesis of a poly(ionic liquid)/ionic liquid cocrystal ionogel.
  • Characterization of cocrystal structure and phase transition temperatures based on alkyl chain length.
  • Evaluation of adhesion switching (peel strength, switching ratio) and electrical property changes.
  • Fabrication and testing of a smart capture patch utilizing the adhesion-electrical coupling effect.

Main Results:

  • The ionogel exhibits ultrafast phase transitions (<1 ms) controlled by alkyl chain length (-10 to 60°C).
  • Achieved significant switching in adhesion (peel strength >1000 N/m, ratio >120) and electrical properties (ratio 10²-10³).
  • Demonstrated a dual-mode smart capture patch for controlled object pickup and release.

Conclusions:

  • The poly(ionic liquid)/ionic liquid cocrystal ionogel offers a promising platform for smart adhesive materials.
  • The material's adhesion-electrical coupling enables dynamic feedback for advanced interface applications.
  • This work provides a new design strategy for smart adhesives in emerging technologies.