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3D-Printed Biomimetic Structural Colors.

Ran Bi1, Xiaohong Li1, Xingcheng Ou1

  • 1Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 28, 2023
PubMed
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This summary is machine-generated.

Researchers developed a new method for printing structural color materials with adjustable resolution and improved flexibility. This technique uses a volatile solvent to enable direct-ink-writing of cholesteric liquid crystal elastomers (CLCEs), creating complex patterns for advanced applications.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optics

Background:

  • Fabricating structural color materials with controlled resolution and high expansibility presents significant challenges.
  • Existing methods often struggle to achieve both precise pattern formation and material flexibility.

Purpose of the Study:

  • To develop a facile strategy for printing cholesteric liquid crystal elastomers (CLCEs) into complex structural color patterns.
  • To achieve variable resolution and enhanced expansibility in printed structural color materials.
  • To demonstrate the integration of this printing strategy with bionic robots.

Main Methods:

  • A volatile solvent was introduced into synthesized CLC oligomers to modify rheological properties for direct-ink-writing (DIW).
  • The printing process combined shear flow and anisotropic deswelling to induce ordered cholesteric arrangements.
Keywords:
bionic robotscholesteric liquid crystalsdirect-ink-writingsolvent-caststructural color

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  • Printing parameters were systematically investigated to control resolution and pattern quality.

    • Main Results:

    • Achieved resolution control over a wide range, enabling the printing of multi-sized 1D or 2D patterns with consistent quality.
    • Demonstrated high expansibility of the solvent-cast DIW strategy.
    • Successfully printed multi-responsive bionic butterfly and flower robots exhibiting biomimetic locomotion and coloration.

    Conclusions:

    • The developed DIW strategy offers a simplified approach to precise full-color structural printing.
    • This method significantly enhances the capability of structural color materials for integration into complex systems like bionic robots.
    • The printed CLCEs show potential for advanced applications requiring dynamic color and motion.