# US 10,870,256 B2 · Hydrophilic aluminum surface body having hybrid nanostructure and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,256 B2 - Document ID: US10870256B2 - Status: Granted - Kind: B2 - Application number: 16/184,956 - Filed: 2018-11-08 - Published: 2019-07-04 - Granted: 2020-12-22 - Earliest claimed: 2017-12-29 - Assignees: Korea Institute of Science and Technology - Applicants: Korea Institute of Science and Technology - Inventors: Myoung Woon Moon; Sun Mi Yoon; Kwang Ryeol Lee; Hye Bin Lee; Young A Lee - Web page: https://patentgrep.com/patent/US10870256B2 ## CPC - B32B 5/16: characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} - B32B 15/16: next to a particulate layer - B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} - C23C 22/05: using aqueous solutions - C23C 22/73: characterised by the process - B32B 2264/102: Oxide or hydroxide - B32B 2307/728: Hydrophilic - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) ## Abstract Provided are a hydrophilic aluminum surface body having a hybrid nanostructure and a manufacturing method thereof. The hydrophilic aluminum surface body includes an aluminum substrate; and a nanopattern including a hybrid nanostructure formed on a surface of the aluminum substrate, wherein the hybrid nanostructure includes nanoparticles and a plurality of nanoflakes around the nanoparticles. According to the manufacturing method of the hydrophilic aluminum surface body, hydrophobic aluminum may be artificially prepared as hydrophilic or superhydrophilic aluminum due to a small contact angle, and large-area and mass production is possible and the method is eco-friendly. ## Claims ### Claim 1 A hydrophilic aluminum surface body comprising: an aluminum substrate; and a nanopattern including a hybrid nanostructure formed directly or indirectly on a surface of the aluminum substrate, wherein the hybrid nanostructure includes nanoparticles and a plurality of nanoflakes around the nanoparticles, wherein each of the nanoparticles include at least one selected from the group consisting of metals, metal oxides, carbon nanotubes, and graphene, and wherein the metals include at least one selected from the group consisting of Ti, Au, Ag, Pt, Cr, Fe, Co, Ni, Cu, Si, and alloys thereof, and the metal oxides are oxides of the metals except for boehmite (AlO(OH))), aluminum oxide (Al2O3), or a combination thereof. ### Claim 2 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein each of the nanoflakes has a plate shape, a needle shape, or a combined shape thereof, and the nanoflakes are formed around the nanoparticles and on the aluminum substrate and grown in an upper direction of the surface of the aluminum substrate. ### Claim 3 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein each of the nanoflakes has a height of 10 nm to 300 nm. ### Claim 4 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein each of the nanoflakes includes boehmite (AlO(OH)), aluminum oxide (Al2O3), or a combination thereof. ### Claim 5 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein a plurality of nanoparticles are aggregated to form a nanocluster. ### Claim 6 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein an average diameter of the nanoparticles is about 1 nm to about 1000 nm. ### Claim 7 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein the aluminum substrate has a plate or mesh shape. ### Claim 8 (depends on 1) The hydrophilic aluminum surface body of claim 1, further comprising: an aluminum oxide film including boehmite (AlO(OH)), aluminum oxide (Al2O3), or a combination thereof between the nanopattern and the surface of the aluminum substrate. ### Claim 9 (depends on 1) The hydrophilic aluminum surface body of claim 1, wherein the aluminum surface body has a contact angle of 10° or less using purified water. ### Claim 10 (depends on 1) An oil-water separation apparatus comprising the hydrophilic aluminum surface body of claim 1. ### Claim 11 (depends on 1) A manufacturing method of the hydrophilic aluminum surface body of claim 1, the method comprising: preparing a hydrophilic aluminum surface by oxidizing nanoparticles and an aluminum substrate to form a hybrid nanostructure including nanoparticles on a part or the whole of the surface of the aluminum substrate and a plurality of nanoflakes around the nanoparticles. ### Claim 12 (depends on 11) The manufacturing method of claim 11, wherein oxidation in the preparing of the hydrophilic aluminum surface is performed by bringing a reaction liquid including water or a vapor thereof into contact with the nanoparticles and the aluminum substrate. ### Claim 13 (depends on 11) The manufacturing method of claim 11, wherein oxidation in the preparing of the hydrophilic aluminum surface is performed by bringing a reaction liquid including water at about 70° C. to about 150° C. or a vapor thereof into contact with the nanoparticles and the aluminum substrate. ### Claim 14 (depends on 11) The manufacturing method of claim 11, wherein oxidation in the preparing of the hydrophilic aluminum surface is performed for about 1 minute to 100 minutes. ### Claim 15 (depends on 11) The manufacturing method of claim 11, wherein each of the nanoparticles includes at least one selected from the group consisting of metals, metal oxides, carbon nanotubes, and graphene. ### Claim 16 (depends on 11) The manufacturing method of claim 11, wherein each of the nanoparticles include at least one selected from the group consisting of Ti, Au, Ag, Pt, Cr, Fe, Co, Ni, Cu, Al, Si, alloys thereof and oxides thereof. ### Claim 17 (depends on 11) The manufacturing method of claim 11, wherein each of the nanoflakes has a plate shape, a needle shape, or a combined shape thereof, and the nanoflakes are formed around the nanoparticles and on the aluminum substrate and grown in an upper direction of a surface of the aluminum substrate to form a hybrid nanostructure. ### Claim 18 (depends on 11) The manufacturing method of claim 11, wherein each of the nanoflakes includes boehmite (AlO(OH)), aluminum oxide (Al2O3), or a combination thereof.