Method for producing a water-repellent textile

Patent metadata

Field	Value
Publication number	US-2022380972-A1
Application number	US-202217749055-A
Country	US
Kind code	A1
Filing date	May 19, 2022
Priority date	May 19, 2021
Publication date	Dec 1, 2022
Grant date	—

Abstract

A water-repellent textile is produce by applying to a textile a solution of Al13 nanoclusters or aluminum nitrate or hydrates of aluminum nitrate in a solvent to produce a wetted textile; and photo-annealing the wetted textile with ultraviolet light having a wavelength in the range of 180 nm to 260 nm to produce an Al2O3 coating on fibers of the textile. The textile may be, for example, cotton, polyester, wool, nylon, chiffon, nubuck, leather, burlap, silk, denim, or any combination thereof. Preferably, the solvent is a solubilizing organic solvent, pure water, or a miscible organic/water solvent mixture.

First claim

1 . A method for producing a water-repellent textile, the method comprising:
a) applying to a textile a solution of Al 13 nanoclusters or aluminum nitrate or hydrates of aluminum nitrate in a solvent to produce a wetted textile; b) photo-annealing the wetted textile with ultraviolet light having a wavelength in the range of 180 nm to 260 nm to produce an Al 2 O 3 coating on fibers of the textile.

2 . The method of claim 1 wherein the textile comprises cotton, polyester, wool, nylon, chiffon, nubuck, leather, burlap, silk, denim, or any combination thereof.

3 . The method of claim 1 wherein the solvent is acetone/water, and the solution has an acetone/water ratio ranging from 1:1 to 10:1.

4 . The method of claim 1 wherein the solvent is acetone/water, and the solution has an acetone/water ratio of 5:1.

5 . The method of claim 1 wherein the solution is a 5 mM to 20 mM solution of Al 13 nanoclusters in acetone/water, where the Al 13 nanoclusters are flat-Al 13 nanoscale clusters, Al 13 (μ 3 -OH) 6 (μ-OH) 18 (H 2 O) 24 (NO 3 ) 15 .

6 . The method of claim 1 wherein the solution is a 0.05 M to 0.2 M solution of aluminum nitrate (Al(NO 3 ) 3 .9H 2 O) in acetone/water.

7 . The method of claim 1 wherein applying the solution to the textile comprises spray coating, drip coating, drop coating, dip coating, spin coating, or ink jet printing.

8 . The method of claim 1 wherein the ultraviolet light has wavelengths with at least one peak below 190 nm.

9 . The method of claim 1 wherein the ultraviolet light has wavelengths with at least one peak above 200 nm.

10 . The method of claim 1 wherein the ultraviolet light has wavelengths with peaks at 253.7 and 183.9 nm.

11 . The method of claim 1 wherein photo-annealing the wetted textile with ultraviolet light is performed with a mercury lamp having power in the range 25-28 mW/cm 2 .

12 . The method of claim 1 wherein photo-annealing the wetted textile with ultraviolet light is performed with a mercury lamp having power in the range 5-8 mW/cm 2 .

13 . The method of claim 1 wherein photo-annealing the wetted textile with ultraviolet light heats the wetted textile to a temperature no more than 150° C.

14 . The method of claim 1 further comprising thermally treating the textile at a temperature no more than 150° C.

15 . The method of claim 1 further comprising thermally treating the textile at a temperature no more than 60° C.

16 . The method of claim 1 wherein the solvent is ethanol, and the solution has a concentration no more than 5 mM.

17 . The method of claim 1 wherein the solvent is 2-methoxy ethanol, and the solution has a concentration ranging from 5 to 20 mM.

18 . The method of claim 1 wherein the solvent is ethanol or ethanol/water, and the mixed solution has an ethanol/water ratio ranging from 1:1 to 10:1.

19 . The method of claim 1 wherein the solvent is a solubilizing organic solvent, pure water, or a miscible organic/water solvent mixture.

Assignees

• Univ Oregon

Inventors

• Levine Jordan D
• Rosen Alex Q
• Johnson Darren W
• Knecht Tawney A

Classifications

• D06M2200/12

  Hydrophobic properties · CPC title

• D06M11/45 Primary

  Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates · CPC title

• D06M23/00

  Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process · CPC title

• D06M10/001

  Treatment with visible light, infrared or ultraviolet, X-rays · CPC title

• D06M11/64

  with nitrogen oxides; with oxyacids of nitrogen or their salts (with pernitric acids or their salts D06M11/50) · CPC title