PTFE/EP Reinforced MOF/SiO2 Composite as a Superior Mechanically Robust Superhydrophobic Agent towards Corrosion Protection, Self‐Cleaning and Anti‐Icing. Issue 2 (2nd December 2021)

• Record Type: Journal Article
• Authors: Hussain, Muhammad Muzammal; Majeed, Muhammad K.; Ma, Haitao; Wang, Yunpeng; Saleem, Adil; Lotfi, Mina
• Is Part Of: Chemistry. Volume 28:Issue 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-02
• Subjects: corrosion inhibition -- mechanochemical robustness -- MOFs -- superhydrophobicity; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202103220
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Organic resin cross‐linking ZIF‐67/SiO2 superhydrophobic (SHPB) multilayer coating was successfully fabricated on metal substrate. The perfluoro‐octyl‐triethoxy silane (POTS) modified ZIF‐67 and SiO2 coating was applied on primary coated polytetrafluoroethylene (PTFE) and epoxy resin (EP) via spray coating method. Here, we present that the robust superhydrophobicity can be realized by structuring surfaces at two different length scales, with a nanostructure design to provide water repellence and a microstructure design to provide durability. The as‐fabricated multilayer coating displayed superior water‐repellence (CA=167.4°), chemical robustness (pH=1–14) and mechanical durability undergoing 120th linear abrasion or 35th rotatory abrasion cycle. By applying different acidic and basic corrosive media and various weathering conditions, it can still maintain superior‐hydrophobicity. To get a better insight of interaction between inhibitor molecules and metal surface, density functional theory (DFT) calculations were performed, showing lower energy gap and increased binding energy of ZPS/SiO2 /PTFE/EP (ZPS=ZIF‐67+POTS) multilayer coating compared to the ZIF‐67/SiO2 /PTFE/EP, thereby supporting the experimental findings. Additionally, such coatings may be useful for applications such as anti‐corrosion, self‐cleaning, and anti‐icing multi‐functionalities. Abstract : The robust, highly durable and multi‐functional superhydrophobic surfaces were fabricated by spray coating technique on various substrates, including metals and non‐metals such as steel 304, steel 306 L, fiber, cardboard, and glass.