Superamphiphobic surfaces and compositions and methods of forming the same

• US 10,202,522 B2
• Filed: 11/07/2014
• Issued: 02/12/2019
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: Trustees Of The University Of Pennsylvania (University of Pennsylvania)
• Original Assignee: Drexel University
• Inventors: Yang, Shu, Ge, Dengteng, Yang, Lili
• Primary Examiner(s): Cain, Edward J
• Application Number:
  US15/035,016
• Publication Number:
  US 20160289498A1
• Time in Patent Office: 1,558 Days
• CPC Class Codes: B05D 1/02 performed by spraying
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: C08G 77/02 Polysilicates
• CPC Class Codes: C08G 77/24 halogen-containing groups
• CPC Class Codes: C08K 2201/011 Nanostructured additives
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 183/02 Polysilicates
• CPC Class Codes: C09D 183/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen

Abstract

Provided herein are fluid compositions comprising at least one silane having one or more hydrophilic groups, at least one silane having one or more fluorinated moieties, and stringed silica nanoparticles. Additionally, superamphiphobic surfaces resulting from coating and curing a fluid composition on a substrate are disclosed. Also provided are methods of forming a superamphiphobic surface, comprising coating a substrate of interest with the fluid composition and curing the coated substrate.

Claims

1. A fluid composition comprising:

at least one silane having one or more hydrophilic groups;

at least one silane having one or more fluorinated moieties; and

stringed silica nanoparticles.

2. The fluid composition of claim 1, wherein the stringed silica nanoparticles are dispersed in a sol solution of a partial condensation product of the at least one silane having one or more hydrophilic groups and the at least one silane having one or more fluorinated moieties.

3. The fluid composition of claim 1, wherein the one or more hydrophilic groups are alkoxy groups, epoxy groups, or amino groups.

4. The fluid composition of claim 3, wherein the alkoxy groups are lower alkoxy groups.

5. The fluid composition of claim 1, wherein the one or more fluorinated moieties is a fluorinated C₄-C₁₆ moiety.

6. The fluid composition of claim 1, wherein the at least one silane having one or more hydrophilic groups comprises tetraethyl orthosilicate (TEOS) and the at least one silane having one or more fluorinated moieties comprises (heptadecafluoro-1, 1, 2, 2 tetrahydrodecyl)triethoxysilane (HDFTES).

7. The fluid composition of claim 2, wherein the sol solution is prepared by mixing at least one silane having one or more alkoxy groups and at least one silane having one or more perfluorinated moieties with a sub-stoichiometric amount of water.

8. The fluid composition of claim 1, further comprising a solvent, a catalyst, or both.

9. The fluid composition of claim 8, further comprising a lower alcohol, ammonia, water, or any combination thereof.

10. The fluid composition of claim 1, wherein said composition has a silica nanoparticle concentration in a range of from about 0.02 wt % to about 10 wt %.

11. The fluid composition of claim 1, wherein the one or more fluorinated moieties is a perfluorinated moiety.

12. A superamphiphobic surface resulting from coating and curing a fluid composition of claim 1 on a substrate.

13. The superamphiphobic surface of claim 12, wherein the surface has a static water contact angle greater than 150°

, a hexadecane contact angle greater than 150°

, and a liquid roll-off angle of less than 5°

.

14. The superamphiphobic surface of claim 12, wherein the substrate comprises glass, ceramic, plastic, metal, fabric, paper, concrete, stone, brick, wood, or a combination thereof.

15. The superamphiphobic surface of claim 12, wherein the fluid composition is present as a fractal-like nanoporous structure on the surface.

16. The superamphiphobic surface of claim 12, wherein the surface is transparent to visible light, is resistant to mechanical wears, or both.

17. The superamphiphobic surface of claim 16, wherein the surface is resistant to impact with liquids, solids, or both.

18. A method of forming a superamphiphobic surface, comprising:

coating a substrate with the fluid composition of claim 1; and

curing the coated substrate.

19. The method of claim 18, wherein said curing comprises air drying.

20. The method of claim 18, wherein said curing comprises exposing the surface to ultraviolet radiation.

21. The method of claim 18, wherein coating comprises spray coating.

22. The method of claim 18, wherein the substrate comprises glass, ceramic, plastic, metal, fabric, paper, concrete, stone, brick, wood, or a combination thereof.