Constructing a hierarchical coating with photothermal superhydrophobic property by spraying and modification on polyurethane foam for anti-icing and deicing

A Fluorine-Free Superhydrophobic Micro–Nano Structured SiO2/TiN Coating for Anti-icing and Photothermal Deicing

“…The freezing time is much longer than those of reported coatings (Table S4). ,, The relatively faster icing time on the bare Al sheet surface results from the direct freezing process from bottom to up at the solid–liquid contact line. As for SiO 2 /TiN coating, an air layer can be trapped between the water droplets and rough structure, which can reduce the solid–liquid contact area and resist the heat transfer, thus delaying the freezing of water on the solid–liquid interface.…”

“…This superior tape-peeling resistance of SiO 2 /TiN coating is comparable to those of reported similar coating materials (Table S8). ,, To evaluate the potential application, the SiO 2 /TiN coating was applied on various substrates including Cu sheet, wood, Al sheet, and glass, and the adhesive forces were measured (Figure f). Among them, the adhesive force of SiO 2 /TiN coating with glass substrate is the strongest at 8.8 MPa.…”

“…A superhydrophobic surface offers an effective way to delay the icing time. − This is based on the presence of an air layer within the surface textures, which can greatly reduce the contact areas between water droplets and solid substrate. − The introduction of photothermal materials into superhydrophobic coating can effectively convert solar energy into thermal energy and promote the ice melting at the interface and then the removal of unmelted ice by gravity or superhydrophobicity. − Liu and co-workers constructed an all-water-based superhydrophobic coating by using carbon nanotubes, polydopamine, and Ag particles as photothermal materials and then mixing them in fluorine-containing polyacrylic emulsion . Under the irradiation of a xenon lamp, the melting time of the ice cubes on the coating surface was reduced by 982 s. Apart from the commonly used carbon-based materials and black metal oxides, − low-cost titanium nitride (TiN) nanoparticles have been proven recently to possess a plasmonic effect that can be used for photothermal conversion. ,− Wang’s groups have fabricated a flexible photothermal coating by embedding TiN nanoparticles in polydimethylsiloxane solution .…”

Preparation of superhydrophobic asymmetric vitrimer coating with high porosity and the key role of hierarchical pocket structure on long freeze delay time and high durability

“…As shown in Table 1, the mechanical stability of BVSP3 was comparable over conventional superhydrophobic coatings, [45][46][47][48][49][50] and was superior over porous superhydrophobic coatings, such as polyurethane foam, and so on. 52,53 The result could be attributed to the interconnected pockets, which can effectively protect the hierarchical superhydrophobic structure. Besides, the DT of BVSP3 was decreased to 10,000 s after abrasion for 30 times (Figure 10B), which was longer than a large amount of anti-icing coating.…”