Temperature Dependent Switchable Superamphiphobic Coating on Steel Alloy Surface
Water and oil repellence from surface of steel to increase its lifetime and efficiency has shown a great interest in todays' research. In this work, superamphiphobic coating on steel surface was synthesized by employing drop casting technique using 1H, 1H, 2H, 2H-perfluorooctyltrichlorosilane (PFOTS) and silica (SiO2) nanoparticles. Surface morphological analysis confirms the presence of overhanging microstructures on the coated surface and it shows the super repellency to low surface tension liquid hexadecane (γ = 27 mN/m). Its superamphiphobic property is also maintained after annealing in temperature range from 25 to 350 °C; however, annealing of coating at higher temperature degrades —CF2 and —CF3 functional group and superamphiphobicity turns into superhydrophobicity. Additionally coating shows excellent chemical stability. Further, abrasion, adhesion, liquid jet impact and bending tests show the good mechanical durability of coating. Furthermore, the coating also exhibits excellent self-cleaning property. The aforesaid stable superamphiphobic steel surfaces have potential industrial applications.
D. Nanda et al., "Temperature Dependent Switchable Superamphiphobic Coating on Steel Alloy Surface," Journal of Alloys and Compounds, vol. 727, pp. 1293 - 1301, Elsevier Ltd, Dec 2017.
The definitive version is available at https://doi.org/10.1016/j.jallcom.2017.08.249
Materials Science and Engineering
Keywords and Phrases
PFOTS; Self-cleaning; Superamphiphobic; Superhydrophobic
International Standard Serial Number (ISSN)
Article - Journal
© 2017 Elsevier Ltd, All rights reserved.
01 Dec 2017