Microskeleton‐Nanofiller Composite with Mechanical Super‐Robust Superhydrophobicity against Abrasion and Impact

Abstract

Superhydrophobic surfaces have promised tremendous applications in living and industrial areas for the past two decades. Real applications, however, meet challenges, with the central concern being the robustness to resist mechanical abrasions and impacts. Here, a revolutionary strategy is proposed to create a microskeleton-nanofiller (MSNF) film with exceptionally mechanical superstable superhydrophobicity. The strategy is conceptually different from the traditional superhydrophobic 3D microskeleton, because a 3D microskeleton is used to completely fill in the infused superhydrophobic medium. The resulting MSNF film can reserve superhydrophobicity under not only continuous abrasion before the complete wearing off the film, but also Taber abrasion, knifescratch, and cyclic tape peels. In addition, the MSNF film enables damage resistance to heavy impact at least up to a kinetic energy of ≈40.2 J. Furthermore, the MSNF film is also superamphiphobic to prevent oil contamination and can reserve the superhydrophobicity under large bending or torsion. Together with robustness and scalability, the MSNF film will be useful in automobiles, ships, aircraft, and houses in harsh environments and the strategy can extend to various inexpensive structured materials (such as porous iron).

Skin-inspired scalable superhydrophobic coatings with strong mechano-chemical-thermal robustness

“…19). Even after 3,000 cycles under a 250 g load, the θ C is larger than ~150° and θ R is less than 10°, a performance at least 10 times higher than our previous work 30 and other existing studies [31][32][33][34] (Fig. 3a-c, Supplementary Movie 4).…”

Super pressure-resistant superhydrophobic fabrics with real self-cleaning performance

“…The C 1s peak is composed of CF 3 (293.8 eV), CF 2 (292.4 eV), C-O/C-OH (286.5 eV), and C-C/C-H/C-Si (284.8 eV) peaks ( Figure 1 I). The Si 2p peak is composed of Si-C (102.0 eV), Si-O (103.3 eV) and Si- O -Si (103.9 eV) peaks ( Figure S4 ) ( Chen et al., 2020 ; Qing et al., 2020 ). The F content reaches 37.84 at%, indicating presence of abundant perfluorodecyl groups on the surface of the fabric ( Li et al., 2019a ).…”

All‐Organic Superhydrophobic Coating Comprising Raspberry‐Like Particles and Fluorinated Polyurethane Prepared via Thiol‐Click Reaction

“…[ 1–13 ] Many published works are devoted to improving the mechanical robustness of superhydrophobic coatings by optimizing coating design or synthesizing new matrix polymer. [ 14–24 ] However, specialized design for the chemical resistance of coatings, especially for acid and alkali resistance, is usually neglected, limiting their durability. Alkali‐susceptible inorganic particles like slica, zinc oxide, and titanium dioxide are widely used to offer micro‐nano roughness in superhydrophobic coatings, significantly reducing their chemical resistance.…”