Preparation of Mechanically Stable Superamphiphobic Coatings via Combining Phase Separation of Adhesive and Fluorinated SiO2 for Anti-Icing

Abstract

Superamphiphobic coatings have widespread application potential in various fields, e.g., anti-icing, anti-corrosion and self-cleaning, but are seriously limited by poor mechanical stability. Here, mechanically stable superamphiphobic coatings were fabricated by spraying the suspension composed of phase-separated silicone-modified polyester (SPET) adhesive microspheres with fluorinated silica (FD-POS@SiO2) on them. The effects of non-solvent and SPET adhesive contents on the superamphiphobicity and mechanical stability of the coatings were studied. Due to the phase separation of SPET and the FD-POS@SiO2 nanoparticles, the coatings present a multi-scale micro-/nanostructure. Combined with the FD-POS@SiO2 nanoparticles of low surface energy, the coatings present outstanding static and dynamic superamphiphobicity. Meanwhile, the coatings present outstanding mechanical stability due to the adhesion effect of SPET. In addition, the coatings present outstanding chemical and thermal stability. Moreover, the coatings can obviously delay the water freezing time and decrease the icing adhesion strength. We trust that the superamphiphobic coatings have widespread application potential in the anti-icing field.

Impalement-Resistant, Mechanically Stable, and Anti-Static Superamphiphobic Coatings Enabled by Solvent Regulation and Their Application in Anti-Icing

“…When the solvent’s boiling point is higher than that of the nonsolvent, the nonsolvent will volatilize first. As a result, the phase-separated adhesives will partly dissolve again and connect with each other to form larger microstructures. ,, Therefore, the morphology and comprehensive properties of the IMASAC coatings can be regulated by using solvents with different boiling points.…”

“…Superhydrophobic/superamphiphobic coatings have attracted a lot of interest because of their low sliding angle (SA) and high contact angle (CA > 150°) for various liquids. − These bioinspired coatings have promising future applications in a variety of sectors, − including self-cleaning, − anti-adhesion, , anti-icing, − and anti-corrosion. − However, their poor impalement resistance and mechanical stability seriously limit their practical applications. , The impact of dynamic liquids or slight mechanical abrasion can easily cause liquids to transition from the Cassie–Baxter state to the Wenzel state on the coatings. , …”

“…However, such structures usually have high aspect ratios, resulting in easy destruction during abrasion due to mechanical stress concentration . To enhance the mechanical stability, strategies such as protective microskeleton, , self-similar structure, ,, introducing bonding layer, , self-healing, , and introducing adhesive , have been used. Among these strategies, introducing adhesive is very plausible because this method is simple and easily scalable. , However, introducing adhesive usually causes an increase in surface energy by covering the low-surface-energy nanoparticles (NPs), which results in poor impalement resistance .…”

Attapulgite-Based Stable Superhydrophobic Coatings for Preventing Rain Attenuation of 5G Radomes

“…The main reason for the poor mechanical stability of superhydrophobic coatings is that their fragile micro/nanostructures are easily damaged by mechanical abrasion. , To date, there has been significant progress in improving the mechanical stability of superhydrophobic coatings. , Designing self-similar micro/nanostructures, , introducing adhesives, , introducing elastic materials − and endowing self-healing functions − are considered to be helpful to improve mechanical stability of superhydrophobic coatings. Among these strategies, the introduction of adhesives is widely favored by researchers, as it is often simple and low-cost .…”

Multifunctional Superamphiphobic Coating Based on Fluorinated TiO2 toward Effective Anti-Corrosion

“…By improving a surface's ability to repel fluids, special anti-wetting coatings can maximize the material's potential for industrial applications by improving the surface's anti-fouling [1][2][3], anti-corrosion [3][4][5][6], anti-icing [6][7][8][9][10], anti-bacterial [7], and many other properties [11]. Researchers have used low surface energy materials to construct micronano roughness structures in order to prepare superhydrophobic coatings, which are widely used in antifouling, anti-corrosion, anti-icing, and self-cleaning applications [12][13][14][15][16][17].…”