Laser-Writing Multicolor Fluorescent Polyurethane for Facile Display and Potential Application in Luminescent...

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Developing dual-color fluorescent materials with advanced properties is challenging but crucial for modern applications.
• Existing methods often lack efficiency, cost-effectiveness, or desired functionalities like tunability and reusability.

Purpose of the Study:

• To explore a facile and efficient strategy for fabricating dual-color fluorescent patterning.
• To investigate a novel polyurethane material for laser-induced tunable fluorescence and other advanced properties.

Main Methods:

• Utilizing laser writing to generate local photoheat for electron group rearrangement and adjust electron delocalization.
• Designing a polyurethane with T-shaped quadruple hydrogen bonding moieties (IU-PUX) to create a rigid H-bonding structure.
• Observing fluorescence transitions (blue to cyan, green, yellow) upon heating due to hydrogen bond rearrangement and electron delocalization.

Main Results:

• Achieved efficient and cost-effective dual-color fluorescent patterning with high resolution.
• Demonstrated tunable fluorescence from blue to yellow upon heating via laser writing.
• Exhibited excellent self-healing and adhesion properties attributed to abundant hydrogen bonds.

Conclusions:

• The developed IU-PUX material offers a facile and high-efficiency method for fabricating dual-color label materials with multiple properties.
• The laser writing technique allows for on-demand pattern erasure and creation of reusable labels.
• This approach provides a sustainable alternative to single-use labels, with potential applications in smart packaging and security.