Copper nanoparticle decorated non-woven polypropylene fabrics with durable superhydrophobicity and conductivity

In this study, a facile method was prepared to fabricate highly flexible, conductive and superhydrophobic polymer fabrics. Copper nanoparticles (CuNPs) were decorated on polypropylene fabrics using a simple spraying method and superhydrophobicity was obtained after vacuum drying for 4 h without any surface modifier. Accumulation of CuNPs constituted coral-like rough micro-nano structures, forming a stable Cassie model and endowing the surface with dense charge transport pathways, thus resulting in excellent superhydrophobicity (water contact angle similar to 159 degrees, sliding angle similar to 2.3 degrees) and conductivity (sheet resistance similar to 0.92 omega sq(-1)). The fabrics displayed superior waterproof and self-cleaning properties, as well as great sustainability in the water. Additionally, the superhydrophobicity and conductivity can be almost maintained after heat treatment, wear testing, water droplet impinging, weak alkali/acid treatment and repeated bending-kneading tests. These superhydrophobic and conductive fabrics that are free from moisture and pollution can be a reliable candidate to solve the water-penetration issue in the rapid development of flexible electronics.

Automated summary

A facile method was developed to fabricate highly flexible, conductive, and superhydrophobic polymer fabrics by decorating copper nanoparticles on polypropylene fabrics. The fabrics exhibited excellent superhydrophobicity, conductivity, and durability, maintaining stable performance even after various tests. These fabrics could be a reliable solution to the water-penetration issue in the rapid development of flexible electronics.