Fabrication of Superamphiphobic Surfaces via Spray Coating; a Review

Superamphiphobic coatings that simultaneously repel both water and oil and are applicable to a wide range of surfaces are needed for use in self‐cleaning, anti‐icing, and antimicrobial coatings. Spray coating is a method that can be used to apply such coatings to a wide range of surfaces in a scalable and high throughput manner. This review presents a comprehensive overview of the materials architecture, synthesis, applications, and figures‐of‐merit of superamphiphobic surfaces that are deposited using spray coating. The design requirements of superamphiphobic surfaces—surface roughness and wettability, re‐entrant topographic features, and chemical composition—are initially introduced. Based on the material, different synthesis techniques are then discussed with a focus on metal oxides and metal oxide composites, polymers, emerging, and green materials. The areas of application of superamphiphobic coatings are also presented. Finally, the main hurdles in using such coatings in real‐life applications are discussed in depth, and emerging technologies for overcoming these challenges are presented. This review paper introduces the state‐of‐the‐art design and the various materials used to fabricate superamphiphobic coatings via spray coating. Next, this paper presents the spray parameters impacting the coatings’ superamphiphobicity. Furthermore, the various applications of such coatings are discussed along with the importance of durability, transparency, and robustness for these applications. To conclude, emerging technologies and future trends are covered.