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Fast Digital Patterning of Surface Topography toward Three-Dimensional Shape-Changing Structures.

Zhou Chen1, Changhong Linghu1, Kaixin Yu1

  • 1Department of Engineering Mechanics, Soft Matter Research Center, and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province , Zhejiang University , Hangzhou 310027 , China.

ACS Applied Materials & Interfaces
|December 5, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple method to create 3D shape-changing structures using laser-engraved poly(dimethylsiloxane) (PDMS) elastomers. This technique enables programmable 3D structures from simple polymer sheets, offering new possibilities for soft robots and actuators.

Keywords:
UV-ozone treatmentdigital patterningshape-changing structuresolvent-responsivesurface topography

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Area of Science:

  • Materials Science
  • Polymer Science
  • Soft Robotics

Background:

  • Fabricating 3D shape-changing structures is often complex, limited by intricate manufacturing processes or demanding active materials.
  • Developing facile and simple approaches for 3D shape-changing structures using elastomeric polymers remains a significant challenge in materials science.

Purpose of the Study:

  • To report a fast digital patterning method for creating 3D shape-changing structures from single-layer elastomeric polymers.
  • To demonstrate a simple yet effective approach for programmable 3D structure fabrication using surface topography modification.

Main Methods:

  • Utilized a laser engraver to create digital patterns of surface topography (grooves) on poly(dimethylsiloxane) (PDMS) sheets.
  • Applied UV-ozone treatment to oxidize the PDMS surface prior to laser engraving.
  • Investigated the shape-changing behaviors induced by organic solvents in the engraved PDMS sheets through experimental and numerical studies.

Main Results:

  • Successfully demonstrated programmable 3D shape-changing behaviors in laser-engraved PDMS sheets.
  • Showcased the formation of various complex 3D structures from simple, surface-patterned polymer sheets.
  • Confirmed the fundamental role of surface topography in guiding the 3D shape transformation.

Conclusions:

  • The digital laser engraving of surface topography on PDMS offers a simple and effective strategy for fabricating 3D shape-changing structures.
  • This approach overcomes fabrication complexity and material limitations associated with traditional methods.
  • The developed technique presents significant engineering opportunities for applications in actuators, soft robotics, and other advanced material systems.