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Author Spotlight: Quantitative Characterization of Liquid Photosensitive Bioink Properties for Continuous Digital Light Processing Based Printing
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3D-Printing Thermo-Responsive Photonic Inks Based on Cellulose Semi-Interpenetrating Liquid Crystal Networks.

Dong Li1,2, Qiang-Wu Tan1, Chun-Xia Zhao2

  • 1The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Advanced Polymeric Materials, College of Chemistry, Sichuan University, Chengdu, 610064, China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 13, 2025
PubMed
Summary

Researchers developed 3D-printable photonic inks using cholesteric liquid crystals. These inks enable complex structures with dynamic thermochromic properties, overcoming challenges in controlling printability and color change.

Keywords:
3D printinginformation encryptionphotonic crystalsstructural colortemperature response

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Chemistry

Background:

  • 3D-printable photonic crystals are vital for applications like sensors and information encryption.
  • Developing inks with both 3D printability and dynamic color-changing capabilities is challenging.

Purpose of the Study:

  • To create printable and thermosensitive photonic inks for fabricating structural-color devices.
  • To achieve simultaneous control over 3D printability and dynamic thermochromic function.

Main Methods:

  • Co-assembly of hydroxypropyl cellulose (HPC) and hydroxyethyl acrylate (HEA) into cholesteric liquid crystals.
  • Formation of a semi-interpenetrating network via HEA polymerization to enhance printability and structural integrity.
  • Characterization of thermosensitive color-changing properties and printing of 2D and 3D objects.

Main Results:

  • Demonstrated printable and thermosensitive photonic inks based on HPC and HEA.
  • The semi-interpenetrating network facilitated 3D printing of complex structures while maintaining the cholesteric phase.
  • Achieved tunable color change with sensitivities ranging from 6.4 to 3.0 nm °C⁻¹, enabling dynamic thermochromic properties in printed objects.

Conclusions:

  • A novel strategy for developing flexible and responsive photonic materials was presented.
  • The developed inks offer a simple and effective method for creating 3D structural-color devices with tunable thermochromism.
  • This research advances the fabrication of advanced functional materials for diverse applications.