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Actuating materials. Voxelated liquid crystal elastomers.

Taylor H Ware1, Michael E McConney2, Jeong Jae Wie1

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This summary is machine-generated.

Researchers developed programmable liquid crystal elastomers with locally controlled molecular order. This allows soft materials to change shape on demand, enabling new multifunctional devices.

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Area of Science:

  • Materials Science
  • Soft Robotics
  • Polymer Chemistry

Background:

  • Programmable shape change in soft materials is crucial for advanced device functionality.
  • Localized control over mechanical response magnitude and directionality is a key challenge.
  • Liquid crystal elastomers (LCEs) offer potential for tunable mechanical properties.

Purpose of the Study:

  • To develop soft, ordered materials with precisely controlled local mechanical responses.
  • To demonstrate the fabrication of 3D objects from flat sheets using patterned molecular order.
  • To explore the potential of these materials for creating multifunctional devices.

Main Methods:

  • Preparation of liquid crystal elastomers with spatially patterned director (molecular order).
  • Writing the director within local volume elements (voxels) as small as 0.0005 mm³.
  • Utilizing thermal or chemical stimuli to induce shape change (bending and stretching).

Main Results:

  • Achieved localized control over the director, dictating the material's mechanical response (up to 55% strain).
  • Demonstrated the transformation of flat LCE sheets into 3D objects via controlled bending and stretching.
  • Successfully patterned director in small voxels for precise shape programming.

Conclusions:

  • Programmable shape-changing LCEs with localized director control are achievable.
  • These materials enable the creation of monolithic, multifunctional devices through controlled deformation.
  • Potential applications include reconfigurable substrates for flexible electronics in aerospace, medicine, and consumer goods.