Toward Multi-Functional Road Surface Design with the Nanocomposite Coating of Carbon Nanotube Modified Polyurethane:...

Area of Science:

• Materials Science
• Nanotechnology
• Civil Engineering

Background:

• Current road surfaces lack integrated safety and sustainability features.
• Need for advanced materials in transportation infrastructure to address climate challenges and improve efficiency.

Purpose of the Study:

• To develop a multifunctional road surface coating with temperature sensing and self-heating capabilities.
• To investigate the properties of carbon nanotube (CNT) modified polyurethane (PU) nanocomposites for road applications.

Main Methods:

• Fabrication of CNT/PU nanocomposite coatings with varying CNT concentrations.
• Characterization of electrical conductivity, hydrophobic properties, and temperature sensitivity.
• Evaluation of self-heating performance using the Joule heating effect.

Main Results:

• Increased CNT concentration enhanced electrical conductivity and hydrophobicity.
• CNT/PU coatings exhibited high temperature sensitivity in the freezing range (negative temperature coefficient of resistance).
• Effective heating performance was achieved through Joule heating, enabling deicing.

Conclusions:

• CNT/PU coatings demonstrate significant potential as multifunctional road materials.
• The developed coatings can autonomously detect freezing conditions and provide deicing.
• This innovation promises improved road safety and environmental sustainability for future transportation systems.