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Teaching hydrogels how to move like an earthworm.

Lilit Yeghiazarian1, Hitesh Arora2, Vasile Nistor3

  • 1UCLA School of Public Health, CHS 51-239D, Los Angeles, CA 90095, USA.

Soft Matter
|September 9, 2020
PubMed
Summary

Engineered polymer gels exhibit directed motion by controlling phase transitions. This breakthrough enables potential applications in drug delivery and soft medical tools.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Soft Robotics

Background:

  • Symmetry breaking is a fundamental natural principle driving directional movement across scales.
  • This principle is increasingly being applied to engineered systems for controlled motion.
  • Environmentally sensitive polymer gels offer tunable properties for dynamic applications.

Purpose of the Study:

  • To investigate the directed motion and transport capacity of environmentally sensitive polymer gels.
  • To demonstrate the utilization of symmetry breaking in engineered soft materials.
  • To explore the potential of hydrogel-based systems for advanced applications.

Main Methods:

  • Utilizing cylindrical hydrogels composed of environmentally sensitive polymers.
  • Spatially and temporally controlling the propagation of volume phase transitions along the hydrogel length.
  • Analyzing the resulting directed motion and transport capabilities.

Main Results:

  • Demonstrated controlled directional movement of cylindrical hydrogels.
  • Showcased the ability to drive motion via controlled phase transitions.
  • Quantified the transport capacity of the system.

Conclusions:

  • Symmetry breaking via controlled phase transitions effectively drives directed motion in polymer gels.
  • These hydrogel systems hold significant promise for applications in biochemical testing, targeted drug delivery, and soft medical tools.