Highly Conductive Water-Based Polymer/Graphene Nanocomposites for Printed Electronics

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Development of conductive inks is crucial for printed electronics.
• Graphene and carbon nanotubes offer excellent electrical properties.
• Polymer matrices influence ink conductivity and processability.

Purpose of the Study:

• To prepare and characterize highly conductive carbon inks.
• To investigate the relationship between nanohybrid content and electrical conductivity.
• To assess the suitability of these inks for gravure printing applications.

Main Methods:

• Formulation of nanocomposite inks using hydrophilic graphene/carbon nanotube hybrids with polystyrene-acrylic resin or water-soluble polymers.
• Characterization of ink properties, focusing on electrical conductivity.
• Analysis of conductivity dependence on nanohybrid volume fraction using percolation theory.

Main Results:

• Water-based carbon inks exhibited high electrical conductivity.
• Conductivity followed a power law relationship with nanohybrid volume fraction.
• The exponent in the power law was close to percolation theory predictions, suggesting minimal polymer tunneling barrier effects.

Conclusions:

• The developed nanocomposite carbon inks are effective for printed electronics.
• Gravure printing is a viable application for these high-conductivity inks.
• The findings provide insights into optimizing conductive nanocomposite formulations for electronic applications.