Hydrophilic aluminum surface body having hybrid nanostructure and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10870256-B2
Application number	US-201816184956-A
Country	US
Kind code	B2
Filing date	Nov 8, 2018
Priority date	Dec 29, 2017
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

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.

First claim

What is claimed is:

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.

2. 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.

3. The hydrophilic aluminum surface body of claim 1 , wherein each of the nanoflakes has a height of 10 nm to 300 nm.

4. The hydrophilic aluminum surface body of claim 1 , wherein each of the nanoflakes includes boehmite (AlO(OH)), aluminum oxide (Al 2 O 3 ), or a combination thereof.

5. The hydrophilic aluminum surface body of claim 1 , wherein a plurality of nanoparticles are aggregated to form a nanocluster.

6. The hydrophilic aluminum surface body of claim 1 , wherein an average diameter of the nanoparticles is about 1 nm to about 1000 nm.

7. The hydrophilic aluminum surface body of claim 1 , wherein the aluminum substrate has a plate or mesh shape.

8. The hydrophilic aluminum surface body of claim 1 , further comprising:
an aluminum oxide film including boehmite (AlO(OH)), aluminum oxide (Al 2 O 3 ), or a combination thereof between the nanopattern and the surface of the aluminum substrate.

9. The hydrophilic aluminum surface body of claim 1 , wherein the aluminum surface body has a contact angle of 10° or less using purified water.

10. An oil-water separation apparatus comprising the hydrophilic aluminum surface body of claim 1 .

11. 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.

12. 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.

13. 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.

14. 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.

15. 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.

16. 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.

17. 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.

18. The manufacturing method of claim 11 , wherein each of the nanoflakes includes boehmite (AlO(OH)), aluminum oxide (Al 2 O 3 ), or a combination thereof.

Assignees

• Korea Inst Sci & Tech

Inventors

• Moon Myoung Woon
• Yoon Sun Mi
• Lee Kwang Ryeol
• Lee Hye Bin
• Lee Young A

Classifications

• C23C22/73

  characterised by the process · CPC title

• C23C22/68 Primary

  using aqueous solutions with pH between 6 and 8 · CPC title

• C23C8/16

  using oxygen-containing compounds, e.g. water, carbon dioxide · CPC title

• B32B5/16 Primary

  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)} · CPC title

• B32B2307/728

  Hydrophilic · CPC title