Molding processed multi-layered and multi-functional nanocomposites with high structural ability, electrical...

Area of Science:

• Materials Science
• Surface Science
• Nanotechnology

Background:

• Bioinspired superhydrophobic surfaces offer potential in self-cleaning, waterproofing, and anti-icing applications.
• Delicate hierarchical structures of artificial superhydrophobic surfaces limit their use under mechanical stress.
• Transforming durable composite materials into superhydrophobic surfaces and adding electrical conductivity can enhance their applicability.

Purpose of the Study:

• To fabricate a novel multi-layered and multi-functional nanocomposite (MMNC) with robust superhydrophobicity and electrical conductivity.
• To evaluate the mechanical strength, surface properties, and durability of the fabricated MMNCs under various harsh conditions.

Main Methods:

• A facile molding process was employed to create the multi-layered and multi-functional nanocomposite (MMNC).
• Characterization included tensile strength, modulus, surface electric conductivity, water contact angle, and water sliding angle measurements.
• Durability was tested against mechanical abrasion (tape peel, sandpaper, file) and chemical corrosion (acids, base).
• Resistance to water impalement was assessed using turbulent water jet impact.

Main Results:

• The MMNCs exhibited high tensile strength (∼226.4 MPa) and modulus (∼24.8 GPa).
• Achieved superhydrophobicity with a water contact angle of ∼155.4° and sliding angle of ∼2.0°.
• Demonstrated robust water-repellency under severe mechanical abrasion and chemical corrosion.
• Showcased high resistance to water impalement (up to ∼29.5 m s-1 jet velocity).
• The material possessed a surface electric conductivity of ∼1.2 S cm-1.

Conclusions:

• The developed MMNCs offer a durable and multi-functional solution for superhydrophobic applications.
• Their combination of mechanical robustness, chemical resistance, and electrical conductivity broadens their potential use.
• These MMNCs are suitable for demanding environments in vehicles, infrastructure, and electronics.