Super-hydrophobic multi-walled carbon nanotube coatings for stainless steel

Nanotechnology
Francesco De NicolaMaurizio De Crescenzi

Abstract

We have taken advantage of the native surface roughness and the iron content of AISI 316 stainless steel to directly grow multi-walled carbon nanotube (MWCNT) random networks by chemical vapor deposition (CVD) at low-temperature (1000°C) without the addition of any external catalysts or time-consuming pre-treatments. In this way, super-hydrophobic MWCNT films on stainless steel sheets were obtained, exhibiting high contact angle values (154°C) and high adhesion force (high contact angle hysteresis). Furthermore, the investigation of MWCNT films with scanning electron microscopy (SEM) reveals a two-fold hierarchical morphology of the MWCNT random networks made of hydrophilic carbonaceous nanostructures on the tip of hydrophobic MWCNTs. Owing to the Salvinia effect, the hydrophobic and hydrophilic composite surface of the MWCNT films supplies a stationary super-hydrophobic coating for conductive stainless steel. This biomimetical inspired surface not only may prevent corrosion and fouling, but also could provide low friction and drag reduction.

References

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Mar 31, 2015·Beilstein Journal of Nanotechnology·Francesco De NicolaMaurizio De Crescenzi

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Citations

Feb 18, 2017·Scientific Reports·L ReinertS Suarez
Jul 18, 2017·ACS Applied Materials & Interfaces·Sawsen ZouaghiMaude Jimenez
Sep 18, 2018·Physical Chemistry Chemical Physics : PCCP·Wanyi Fu, Wen Zhang
May 16, 2015·Beilstein Journal of Nanotechnology·Manuela ScarselliMaurizio De Crescenzi
Feb 7, 2020·Scientific Reports·Francesco De NicolaStefano Lupi

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