Cholesteric Liquid Crystal Network Composite Film with Structure, Dual-Band Responsive Luminescent Color for Multiple...

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Traditional anti-counterfeiting methods are easily forged.
• Advanced multi-functional anti-counterfeiting technologies are underdeveloped.
• There is a need for robust, scalable anti-counterfeiting solutions.

Purpose of the Study:

• To develop a novel composite film with multiple anti-counterfeiting properties.
• To utilize cholesteric liquid crystal polymer networks (CLCN) for advanced security features.
• To integrate UV and IR responsive materials for enhanced authentication.

Main Methods:

• Fabrication of a patterned CLCN film template.
• Filling hollow patterned areas with acrylate monomer and phosphors (UV/IR).
• Characterization of the composite film's optical, thermal, and mechanical properties.

Main Results:

• Successful fabrication of a flexible, highly transmissive composite film.
• Demonstration of multiple anti-counterfeiting features: thermochromism, angular color change, UV fluorescence, and IR upconversion luminescence.
• Creation of a multi-functional anti-counterfeiting color image through mask modification and material selection.

Conclusions:

• The developed composite film offers a novel, multi-layered approach to anti-counterfeiting.
• The integration of CLCN properties with phosphors provides versatile security attributes.
• This technology has significant potential for product authentication, information encryption, and secure storage.