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Related Experiment Video

Updated: Jul 1, 2025

An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
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Reconfiguring hydrogel assemblies using a photocontrolled metallopolymer adhesive for multiple customized functions.

Jiahui Liu1,2, Yun-Shuai Huang1, Yazhi Liu1,2

  • 1Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, China.

Nature Chemistry
|March 8, 2024
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Summary

Researchers developed reconfigurable hydrogel assemblies using a light-sensitive adhesive. These smart materials can change shape and be reprogrammed for applications in soft robotics and advanced manufacturing.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Robotics

Background:

  • Stimuli-responsive hydrogels enable programmable shape changes for advanced applications.
  • Fabricating complex, reconfigurable hydrogel structures with customizable functions remains a challenge.

Purpose of the Study:

  • To develop a method for fabricating reconfigurable hydrogel assemblies with tunable functions.
  • To demonstrate the use of a photocontrolled metallopolymer adhesive for reversible hydrogel assembly.

Main Methods:

  • Hydrogel units were reversibly glued using a photocontrolled metallopolymer adhesive.
  • The adhesive utilized metal-ligand coordination and polymer chain entanglement for strong attachment.
  • Hydrogel assemblies incorporated temperature- and pH-responsive units for stimulus-driven actuation.

Main Results:

  • The metallopolymer adhesive enabled firm attachment and reversible assembly of hydrogel units.
  • Hydrogel assemblies exhibited controlled shape changes and motions in response to temperature and pH stimuli.
  • Disassembly and reassembly of hydrogel units were achieved by light irradiation and heating, respectively.

Conclusions:

  • Reconfigurable hydrogel assemblies can be fabricated using reversible metallopolymer adhesives.
  • The ability to reconfigure structures allows for reprogramming of hydrogel assembly functions.
  • This approach offers a strategy for designing intelligent materials and soft robots with user-defined capabilities.