A multifunctional cardanol-based room-temperature phosphorescent material with multi-stimulus-responsive shape-memory...

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Developing multi-stimulus-responsive materials with room temperature phosphorescence (RTP) for encryption and anti-counterfeiting is challenging.
• Cardanol-based polymers offer potential due to their unique chemical structure.

Purpose of the Study:

• To create a cardanol-based polymer system with stable, long-lived RTP and multi-stimulus responsiveness.
• To engineer materials for self-healing, recyclability, and advanced anti-counterfeiting applications.

Main Methods:

• Synthesized a cardanol-based copolymer incorporating N-coordinated bicyclic boronic esters.
• Tuned copolymer structure for rigidity and dynamic covalent networks.
• Investigated material response to heat, UV, and IR stimuli, and assessed long-term stability in various conditions.

Main Results:

• Achieved stable, long-lived RTP with ultralong afterglow up to 12s.
• Demonstrated exceptional water and chemical resistance, retaining RTP after four weeks in H2O, HCl, and NaOH.
• Exhibited UV-responsive rewritable film properties and programmable 2D/3D anti-counterfeiting capabilities.

Conclusions:

• The cardanol-based RTP system successfully integrates multi-stimulus responsiveness, shape memory, and robust stability.
• This material shows significant promise for secure information storage, anti-counterfeiting, and advanced security systems.