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Related Experiment Video

Updated: Oct 23, 2025

An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
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Drosera-Inspired Dual-Actuating Double-Layer Hydrogel Actuator.

Xin Kong1, Yuanze Li1, Wenlong Xu1

  • 1School of Chemistry and Materials Science, Ludong University, Yantai, 264025, China.

Macromolecular Rapid Communications
|August 21, 2021
PubMed
Summary

This study introduces a drosera-inspired hydrogel actuator using dual-layer poly(acrylamide) (PAAm) and poly(N, N-diethyl acrylamide) (PDEAAm) for smart material applications.

Keywords:
actuatorsdouble-layer hydrogelmoisture-responsiveswelling propertiesthermoresponsive

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Area of Science:

  • Materials Science
  • Biomimetics
  • Polymer Science

Background:

  • Insectivorous plants like Drosera utilize rapid movements for prey capture.
  • The plant's antennae feature a double-layer structure enabling contraction and expansion for rapid motion.
  • Understanding these biological mechanisms can inspire novel engineered systems.

Purpose of the Study:

  • To develop a drosera-inspired dual-actuating double-layer hydrogel actuator.
  • To leverage temperature and moisture responsiveness for controlled actuation.
  • To explore applications in object manipulation and artificial intelligence materials.

Main Methods:

  • Fabrication of a double-layer hydrogel actuator composed of temperature-responsive poly(N, N-diethyl acrylamide) (PDEAAm) and moisture-responsive poly(acrylamide) (PAAm).
  • Investigation of the synergistic actuation mechanism driven by the hydrophilic-hydrophobic transition of PDEAAm and swelling of PAAm in response to temperature changes.
  • Design and fabrication of shape-patterned hydrogels to achieve complex shape transformations.

Main Results:

  • The dual-layer hydrogel exhibits significant bending angles due to the synergistic effect of PDEAAm shrinkage and PAAm swelling at elevated temperatures.
  • The actuator demonstrates controlled movement, enabling grasping, transportation, and release of objects.
  • Shape-patterned hydrogels achieve complex, programmable shape changes.

Conclusions:

  • The developed drosera-inspired hydrogel actuator effectively mimics plant-based rapid movement.
  • The synergistic actuation of dual-layer hydrogels offers a promising pathway for advanced soft robotics and artificial intelligence materials.
  • This research provides valuable insights for designing and manufacturing intelligent materials with practical applications.