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Updated: Oct 26, 2025

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Programmable Mechanically Active Hydrogel-Based Materials.

Yixiao Dong1, Allison N Ramey-Ward2, Khalid Salaita1

  • 1Department of Chemistry, Emory University, Atlanta, GA, 30322, USA.

Advanced Materials (Deerfield Beach, Fla.)
|July 26, 2021
PubMed
Summary
This summary is machine-generated.

This review explores hydrogel-based mechanically active materials (MAMs). These smart materials can change shape or appearance in response to stimuli, with applications in robotics and smart systems.

Keywords:
artificial musclesforce sensorsmechanical active materialsprogrammable hydrogel actuatorssmart skin

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Area of Science:

  • Materials Science
  • Polymer Science
  • Robotics

Background:

  • Programmable mechanically active materials (MAMs) are responsive materials that can sense stimuli and produce mechanical outputs or optical changes.
  • Hydrogel-based MAMs are highlighted for their compliance, programmability, biocompatibility, and cost-effectiveness.
  • These materials hold promise for next-generation robotics and smart systems.

Purpose of the Study:

  • To review the composition and programming approaches for hydrogel-based MAMs.
  • To discuss the principles of engineering responsivity to various stimuli (optical, thermal, magnetic, electrical, chemical, mechanical).
  • To summarize emerging applications and future outlook for hydrogel MAMs.

Main Methods:

  • Literature review focusing on hydrogel-based mechanically active materials.
  • Discussion of material composition and programming strategies (top-down and bottom-up).
  • Analysis of different stimuli-responsive mechanisms and their comparative advantages/disadvantages.

Main Results:

  • Hydrogel MAMs can be engineered for diverse stimuli-responsive behaviors.
  • Various programming methods enable tailored material functionalities.
  • A comparison of different responsivity types is presented, outlining their pros and cons.

Conclusions:

  • Hydrogel-based MAMs offer significant potential in advanced applications.
  • Further research into stimuli-responsive mechanisms and programming is crucial for future development.
  • Emerging applications span various fields, driven by the unique properties of these materials.