Temperature Dependent Switchable Superamphiphobic Coating on Steel Alloy Surface

Abstract

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.

Department(s)

Materials Science and Engineering

Keywords and Phrases

PFOTS; Self-cleaning; Superamphiphobic; Superhydrophobic

International Standard Serial Number (ISSN)

0925-8388

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Elsevier Ltd, All rights reserved.

Publication Date

01 Dec 2017

Link to Full Text

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