Coatings with carbon nanostructures with hydrophobic properties made by anodizing and the CVD method on stainless steel

Abstract

The method of anodic oxidation of stainless steel and the subsequent deposition of carbon layers in the CVD processes resulted in obtaining the coatings with hydrophobic and superhydrophobic properties. The parameters of the CVD process were modified and various carbon structures, including graphene type ones, were obtained. The coatings were characterised by Raman spectra and SEM microscopy. The wettability of the surface was evaluated by investigating a contact angle. The samples containing carbon coatings showed hydrophobic properties, and those containing graphene structures were characterized by the contact angle greater than 150°, which means superhydrophobic properties.

Superhydrophobic Coating Based on Porous Aluminum Oxide Modified by Polydimethylsiloxane (PDMS)

“…Figure S1: Wettability of surface (a) superhydrophilic surface θ < 10°, (b) hydrophilic surface θ < 90°, (c) hydrophobic surface θ > 90°, (d) superhydrophobic surface θ > 150°; Figure S2: A drop of water on (a) flat surface—Young model, (b) rough surface—Wenzel model, (c) nano/micro-structured surface—Cassie-Baxter model, (d) nano/micro-structured surface—Metastable model; Figure S3: Average temperature, relative humidity, and precipitation in Warsaw in the period from 21 July to 24 November 2021. References [ 53 , 54 , 55 , 56 , 57 , 58 , 59 ] are cited in the Supplementary Materials.…”