Polyaramid-Based Flexible Antibacterial Coatings Fabricated Using Laser-Induced Carbonization and Copper...

Area of Science:

• Materials Science and Engineering
• Electrical Engineering
• Nanotechnology

Background:

• Flexible electronic circuits are crucial for advanced applications like smart textiles.
• Polyaramid substrates offer thermal stability but require methods for conductivity.
• Laser-induced carbonization presents a novel approach for creating conductive pathways.

Purpose of the Study:

• To develop a fabrication method for flexible electrical circuits on polyaramid substrates.
• To investigate laser-induced carbonization for enhanced conductivity.
• To improve circuit performance through copper electroplating and explore antimicrobial applications.

Main Methods:

• Laser-induced carbonization of polyaramid (Nomex) substrates to create rough, porous microstructures.
• Optimization of laser parameters for high graphitization and electrical conductivity.
• Copper electroplating of carbonized tracks to enhance electrical performance and add functionality.

Main Results:

• Achieved conductivities up to ~45 S cm⁻¹ via laser-induced carbonization, surpassing thermal methods (~38 S cm⁻¹).
• Demonstrated improved sheet resistance in fabricated flexible circuits after copper electroplating.
• Successfully fabricated flexible antibacterial coatings using copper films, highlighting dual functionality.

Conclusions:

• Laser-induced carbonization followed by copper electroplating is an effective method for fabricating high-performance flexible circuits on polyaramid.
• The developed technique enables customized circuit designs for smart textiles, particularly in high-temperature environments.
• The integration offers potential for multifunctional materials with electrical conductivity and antimicrobial properties.