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US 6,994,045 B2Granted
Superhydrophobic coating
AssigneeCNT Spolka Z O.O.
InventorMariusz Paszkowski
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AssigneeCNT Spolka Z O.O.
InventorMariusz Paszkowski
Estimating the term…
This invention solves the problem of reducing the fluid friction resistance accompanying relative movement of surfaces of a solid and a liquid. A superhydrophobic coating acting as a substrate for a gaseous lubricant of very low viscosity, reducing the fluid skin friction, has a hierarchic fracal structural of the surface wherein the forms of the first hierarchic level (2, 3, 9) are located at the coating's substrate, and the forms of each successive hierarchic level (22, 33, 99) are located on the surface of the previous hierarchic level and the forms of individual higher hierarchic levels reiterate the forms of the lower hierarchic levels. Forms of at least two hierarchic levels of rows (2, 22) and ridges (3, 33, 99) occur in the coating and, also, the surface has anisotropic geometry, maximally developed fractally in the direction transverse to the direction of flow and maximally smooth in the direction of flow and, also, has channels located in the coating's substrate to ensure gas flow.
A superhydrophobic coating used as a substrate for gaseous lubricant of very low viscosity, which reduces the fluid skin friction drag, having a developed three-dimensional surface with concave and convex forms situated parallel to each other and to the fluid flow direction, characterised in that it has a fractal structure of hierarchic design, whose forms of the first hierarchic level(2), (3), (9) are located next to the coating substrate, whereas the forms of each successive hierarchic level (3), (33), (99) are located on the surface of forms of previous hierarchic levels, while the forms of individual structures of higher levels reiterate the shape of forms of lower hierarchic levels and the structure comprises forms of at least two hierarchic levels of grooves (2), (22) and ridges (3), (33), (99) and the surface has anisotropic geometry, maximally developed fractally in the direction transverse to the direction of flow and as smooth as possible in the direction of flow and has channels located in the coating's substrate to ensure gas flow.
Dependencies are inferred from the claim text.