Containers, bottles, drums, vats, and tanks having a slippery surface

Patent metadata

Field	Value
Publication number	US-10233334-B2
Application number	US-201715804809-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	Jan 19, 2011
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces. Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). Slippery liquid-infused porous surfaces outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1-1 s), resist ice, microorganisms and insects adhesion, and function at high pressures (up to at least 690 atm). Some exemplary application where slippery liquid-infused porous surfaces will be useful include energy-efficient fluid handling and transportation, optical sensing, medicine, and as self-cleaning, and anti-fouling materials operating in extreme environments.

First claim

The invention claimed is:

1. A container comprising a slippery surface, wherein the slippery surface comprises:
a roughened surface, wherein the roughened surface comprises a plurality of raised structures, wherein the raised structures have a predetermined roughness, have feature sizes ranging from about 10 nm to about 100 μm, and are substantially free of three-dimensionally interconnected pores; and
a lubricating liquid having an affinity for the roughened surface,
wherein the affinity is such that the lubricating liquid spontaneously wets the roughened surface and adheres within the roughened surface to form a stabilized liquid overlayer forming the slippery surface.

2. The container according to claim 1 , wherein the roughened surface is chemically functionalized with one or more chemical functional groups, and
wherein the lubricating liquid has an affinity for the one or more chemical functional groups.

3. The container according to claim 2 , wherein the roughened surface has a roughness factor that is greater than 1, wherein the roughness factor is defined as a ratio between a real surface area of the roughened surface and a projected surface area of the roughened surface.

4. The container according to claim 3 , wherein the roughness factor is about 1 to about 2.

5. The container according to claim 1 , wherein the affinity and the feature sizes are effective to substantially stably immobilize the lubricating liquid between the plurality of raised structures, without dewetting, to form the slippery surface.

6. The container according to claim 1 , wherein the roughened surface has a predetermined roughness and one or more functional groups chemically attached thereto;
wherein the affinity of the lubricating liquid for the roughened surface is determined by an equilibrium contact angle of less than 90°; and
wherein the predetermined roughness and the functional groups are effective to substantially stably immobilize the lubricating liquid in and on the roughened surface.

7. The container according to claim 1 , wherein the roughened surface comprises a polymer film with a patterned surface applied to a surface of the container.

8. An article comprising a slippery surface, wherein the slippery surface comprises:
a roughened surface, wherein the roughened surface comprises a plurality of raised structures, wherein the raised structures have a predetermined roughness, have feature sizes ranging from about 10 nm to about 100 μm, and are substantially free of three-dimensionally interconnected pores; and
a lubricating liquid having an affinity for the roughened surface,
wherein the affinity is such that the lubricating liquid spontaneously wets the roughened surface and adheres within the roughened surface to form a stabilized liquid overlayer forming the slippery surface; and
wherein the article comprises a container, a bottle, a drum, a vat, or a tank.

9. The article according to claim 8 , wherein the roughened surface is chemically functionalized with one or more chemical functional groups, and
wherein the lubricating liquid has an affinity for the one or more chemical functional groups.

10. The article according to claim 8 , wherein the roughened surface has a roughness factor that is greater than 1, wherein the roughness factor is defined as a ratio between a real surface area of the roughened surface and a projected surface area of the roughened surface.

11. The article according to claim 10 , wherein the roughness factor is about 1 to about 2.

12. The article according to claim 8 , wherein the affinity and the feature sizes are effective to substantially stably immobilize the lubricating liquid between the plurality of raised structures, without dewetting, to form the slippery surface.

13. The article according to claim 8 , wherein the roughened surface has a predetermined roughness and one or more functional groups chemically attached thereto;
wherein the affinity of the lubricating liquid for the roughened surface is determined by an equilibrium contact angle of less than 90°; and
wherein the predetermined roughness and the functional groups are effective to substantially stably immobilize the lubricating liquid in and on the roughened surface.

14. The article according to claim 8 , wherein the roughened surface comprises a polymer film with a patterned surface applied to a surface of the article.

15. An article comprising:
a polymer film applied to a surface of the article to form a roughened surface on the article, and
a lubricating liquid having an affinity for the roughened surface,
wherein the affinity is such that the lubricating liquid stably adheres within the roughened surface and spontaneously wets the roughened surface to form a stabilized liquid overlayer forming a slippery surface on the article, and
wherein the article is a container, a bottle, a drum, a vat, or a tank.

16. The article according to claim 15 , wherein the roughened surface is chemically functionalized with one or more chemical functional groups, and
wherein the lubricating liquid has an affinity for the one or more chemical functional groups.

17. The article according to claim 15 , wherein the roughened surface has a roughness factor that is greater than 1, wherein the roughness factor is defined as a ratio between a real surface area of the roughened surface and a projected surface area of the roughened surface.

18. The article according to claim 17 , wherein the roughness factor is about 1 to about 2.

19. The article according to claim 15 , wherein the roughened surface comprises a substrate comprising a plurality of raised structures, wherein the raised structures have a predetermined roughness, have feature sizes ranging from about 10 nm to about 100 μm, and are substantially free of three-dimensionally interconnected pores.

20. The article according to claim 15 , wherein the roughened surface has a predetermined roughness and one or more functional groups chemically attached thereto;
wherein the affinity of the lubricating liquid for the roughened surface is determined by an equilibrium contact angle of less than 90°; and
wherein the predetermined roughness and the functional groups are effective to substantially stably immobilize the lubricating liquid within the roughened surface.

21. The article according to claim 15 , wherein the polymer film comprises a polytetrafluoroethylene.

22. A polymer film configured to be applied to a surface of an article to form a roughened surface on the article,
wherein the article is a container, a bottle, a drum, a vat, or a tank, and
wherein the roughened surface is such that a lubricating liquid having an affinity for the roughened surface stably adheres within the roughened surface and spontaneously wets the roughened surface to form a stabilized liquid overlayer forming a slippery surface on the article.

23. The polymer film according to claim 22 , wherein the roughened surface is chemically functionalized with one or more chemical functional groups, and
wherein the lubricating liquid has an affinity for the one or more chemical functional groups.

24. The polymer film according to claim 22 , wherein the roughened surface has a roughness factor that is greater than 1, wherein the roughness factor is defined as a ratio between a real surface area of the roughened surface and a projected surface area of the roughened surface.

25. The polymer film according to

Assignees

• Harvard College

Inventors

• Aizenberg Joanna
• Aizenberg Michael
• Kang Sung Hoon
• Kim Philseok
• Wong Tak Sing

Classifications

• B05D5/083

  involving the use of fluoropolymers · CPC title

• C09D5/1681

  Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect · CPC title

• C02F1/44

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title

• E04B1/92

  Protection against other undesired influences or dangers (buildings providing protection against external dangers E04H9/00; shielding against dangerous radiation G21F) · CPC title

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title