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Programmed Shape-Morphing Material Using Single-Layer 4D Printing System.

Seonjin Lee1,2, Doyeon Bang2,3, Jong-Oh Park1,2

  • 1School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.

Micromachines
|February 25, 2022
PubMed
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This study introduces a novel single-layer 4D printing method for programmable shape morphing. By controlling UV light exposure, distinct static and shape-morphing layers are created, enabling complex designs for applications like micro-scale soft robots.

Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Robotics

Background:

  • Controllable single-layer 4D printing is a significant challenge for smart materials, robotics, and drug delivery.
  • Existing light-focusing techniques create property differences but struggle with complex single-layer shape formation.
  • Achieving desired shapes from single-layered 4D printed materials remains difficult.

Purpose of the Study:

  • To demonstrate programmed shape morphing using a single-layer 4D printing system.
  • To develop a method for patterning both static and shape-morphing layers within a single print.
  • To advance the creation of micro-scale soft robots.

Main Methods:

  • Utilized a single-layer 4D printing system based on light-focusing.
  • Formulated a shape-morphing layer through short-time (<3 s) UV light illumination.
Keywords:
3D printing4D printingmicroroboticsshape-morphingsoft robot

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  • Formulated a static layer through longer-time (>3 s) UV light illumination.

    • Main Results:

    • Successfully demonstrated programmed shape morphing by patterning distinct static and shape-morphing layers.
    • The differential UV exposure times precisely controlled the mechanical properties of adjacent regions.
    • This technique allows for complex shape transformations from a single material layer.

    Conclusions:

    • The developed single-layer 4D printing technique enables precise control over shape morphing.
    • This method overcomes limitations of previous single-layer approaches.
    • The technique holds significant potential for the future development of micro-scale soft robots.