Hydrophobic and oleophobic coatings
AssigneeBaker Hughes, A Ge Company, LLC
InventorsDeepak Kumar, Zhiyue Xu
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Abstract
A hydrophobic surface comprises a surface texture and a coating disposed on the surface texture, wherein the coating comprises an amorphous diamond like carbon material doped with 10 to 35 atomic percent of Si, O, F, or a combination comprising at least one of the foregoing, or a low surface energy material selected from fluoropolymer, silicone, ceramic, fluoropolymer composite, or a combination comprising at least one of the foregoing; and wherein the surface texture comprises a micro texture, a micro-nano texture, or a combination of a micro texture and a micro-nano texture.
Claims20
A hydrophobic surface comprising a surface texture and a coating disposed on the surface texture, wherein the coating comprises a first layer disposed directly on the surface texture and a second layer disposed on the first layer, the first layer comprising a conforming material and the second layer comprising an amorphous diamond like carbon material doped with 25 to 35 atomic percent of a dopant comprising a combination of Si and O or a combination of Si, O, and F, the diamond like carbon material comprising 60 to 90 atomic percent of sp2 bonded carbon and 10 to 40 atomic percent of sp3 bonded carbon;
- and the conforming material comprising polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, polyvinylidene fluoride, polydimethylsiloxane, polyphenylene sulfide, metal-polytetrafluoroethylene composites, or a combination comprising at least one of the foregoing;
- and wherein the surface texture comprises a micro texture, a micro-nano texture, or a combination of a micro texture and a micro-nano texture;
- and the coating has a scratch hardness of greater than 100 ksi, determined according to ASTM standard D7027-05 (2009) using a micro-scratch tester.
A hydrophobic surface comprising a coating disposed on an un-textured surface, wherein the coating comprises a first layer disposed directly on the un-textured surface and a second layer disposed on the first layer, the first layer comprising a conforming material and the second layer comprising an amorphous diamond like carbon material doped with 25 to 35 atomic percent of a dopant comprising a combination of Si and O, or a combination of Si, O, and F, the diamond like carbon material comprising 60 to 90 atomic percent of sp2 bonded carbon and 10 to 40 atomic percent of sp3 bonded carbon and wherein the un-textured surface comprises a metal;
- and the conforming material comprising polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, polyvinylidene fluoride, polydimethylsiloxane, polyphenylene sulfide, metal-polytetrafluoroethylene composites, or a combination comprising at least one of the foregoing;
- and the coating has a scratch hardness of greater than 100 ksi, determined according to ASTM standard D7027-05 (2009) using a micro-scratch tester.
A method of producing a hydrophobic surface, the method comprising forming a texture on a surface of a substrate to provide a textured surface, forming a coating on the textured surface, wherein the coating comprises a first layer disposed directly on the surface texture and a second layer disposed on the first layer, the first layer comprising a conforming material and the second layer comprising an amorphous diamond like carbon material doped with 25 to 35 atomic percent of a dopant comprising a combination of Si and O, or a combination of Si, O, and F, the diamond like carbon material comprising 60 to 90 atomic percent of sp2 bonded carbon and 10 to 40 atomic percent of sp3 bonded carbon;
- the conforming material comprising polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, polyvinylidene fluoride, polydimethylsiloxane, polyphenylene sulfide, metal-polytetrafluoroethylene composites, or a combination comprising at least one of the foregoing.
Dependencies are inferred from the claim text.