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Electrically programmable adhesive hydrogels for climbing robots.

Junwen Huang1,2, Yu Liu3, Yuxin Yang1

  • 1College of Materials, Xiamen University, Xiamen 361005, People's Republic of China.

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|May 27, 2021
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Summary
This summary is machine-generated.

Researchers developed a novel borate ester polymer hydrogel that rapidly switches adhesion using mild electrical stimuli. This smart adhesive enables programmable attaching and detaching for applications like robot climbing on various surfaces.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Robotics

Background:

  • Programmable adhesion and detachment in materials remain a significant challenge.
  • Existing adhesive materials lack dynamic control over their attachment and detachment behaviors.

Purpose of the Study:

  • To develop a polymer hydrogel with electrically controllable adhesion.
  • To demonstrate the utility of this smart adhesive in robot climbing applications.

Main Methods:

  • Synthesized a borate ester polymer hydrogel.
  • Utilized water electrolysis-induced reversible cleavage and reformation of borate ester linkages to control catechol group exposure.
  • Applied mild electrical stimuli (3.0–4.5 V) to switch adhesion states.
  • Integrated the hydrogel onto climbing robots.

Main Results:

  • The hydrogel exhibited rapid switching between adhesive and nonadhesive states (response time as low as 1 s) upon electrical stimulation.
  • The hydrogel successfully enabled climbing robots to attach and detach from vertical and inverted conductive surfaces (stainless steel, copper).
  • The strategy avoided complex engineering or morphological designs for robot locomotion.

Conclusions:

  • A novel borate ester polymer hydrogel with electrically tunable adhesion was successfully created.
  • This programmable adhesive offers a versatile platform for intelligent devices and robotic locomotion.
  • An effective electrochemical strategy for regulating adhesion in smart polymer adhesives was established.