Bionic Structural Coloration of Textiles Using the Synthetically Prepared Liquid Photonic Crystals

Area of Science:

• Materials Science
• Textile Engineering
• Nanotechnology

Background:

• Bionic photonic crystals (PCs) offer a sustainable alternative for textile coloration.
• Current methods for large-scale production of photonic crystal (PC) structurally colored textiles via liquid photonic crystals (LPCs) face manufacturing challenges.
• Developing efficient, scalable methods for LPCs is crucial for advancing PC-based textile coloration.

Purpose of the Study:

• To develop a rapid and large-scale manufacturing method for liquid photonic crystals (LPCs).
• To enable the efficient preparation of PC structurally colored textiles with controlled optical properties.
• To achieve high structural stability and color saturation in PC structural color fabrics.

Main Methods:

• Emulsion polymerization with a pH regulator to achieve 40 wt.% PS nanospheres without phase transformation.
• Dialysis to remove oligomers and small-molecule salts, yielding a pre-crystallized LPC system.
• Utilizing LPCs as an assembly intermediate for fabric coloration and constructing an encapsulation layer for enhanced stability.

Main Results:

• Successfully synthesized high-mass-fraction (40 wt.%) polystyrene nanosphere dispersions.
• Efficiently prepared pre-crystallized LPC systems by removing impurities.
• Demonstrated control over optical properties by adjusting nanosphere size and mass fraction.
• Achieved rapid, large-area preparation of PC structural color fabric and patterned fabrics with iridescent effects.
• Enhanced structural stability and color saturation of PC structural color fabric through an encapsulation layer.

Conclusions:

• The developed method overcomes challenges in rapid and large-scale LPC manufacturing.
• This approach enables controllable, high-quality PC structural coloration for textiles.
• The findings pave the way for sustainable and aesthetically advanced textile coloration.