Development of polyurethane-based superhydrophobic coatings on steel surfaces

摘要

In this study, a superhydrophobic coating on steel surface has been developed with polyurethane, SiO_2 nanoparticles and hexadecyltrimethoxysilane by using a spin-coating technique. Characterization of the coated steel surface was done by using the contact angle measurement technique, scanning electron microscopy and Fourier transform infrared spectroscopy. With a water tilt angle of 4°±2° and static contact angle of 165°±5°, the coated surface shows a superhydrophobic and self-cleaning nature. Chemical, thermal, mechanical stability tests and droplet dynamic studies were done to evaluate performance of the coating. Excellent selfcleaning, anti-fogging and anti-corrosion properties of coated steel surfaces make them ideal for industrial applications.