Liquid repellent surfaces

Patent metadata

Field	Value
Publication number	US-9650518-B2
Application number	US-201313734446-A
Country	US
Kind code	B2
Filing date	Jan 4, 2013
Priority date	Jan 6, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A surface can be coated with a liquid repellent coating. Materials for making the liquid repellent coating (e.g., a fingerprint resistant coating) can be selected on the basis of surface energy considerations, such as a receding surface energy. The materials can include a polymer and a liquid repelling material, for example, poly(ethyl methacrylate) and a fluorinated silsesquioxane such as fluorodecyl POSS.

First claim

What is claimed is:

1. A method of making a liquid repellent coating on a surface, comprising:
selecting a polymer and a liquid repelling material based on a measured receding surface energy of a coating including the polymer and the liquid repelling material,
wherein the polymer is a poly(ethyl methacrylate) (PEMA), a poly(butyl methacrylate) (PBMA), or a combination thereof; and
wherein the liquid repelling material is a fluoropolymer;

determining a ratio of the selected polymer and the selected liquid repelling material based on a measured receding surface energy;
combining the determined ratio of the selected polymer and the selected liquid repelling material to form a mixture; and
contacting the mixture with the surface to form a coating including the selected polymer and the selected liquid repelling material on the surface.

2. The method of claim 1 , wherein the measured receding surface energy is γ sv,r , γ sv,r d , γ sv,r p , γ sv,r + , or γ sv,r − .

3. The method of claim 2 , wherein the measured receding surface energy, γ sv,r , is no greater than 50 mN m −1 .

4. The method of claim 2 , wherein the measured receding surface energy, γ sv,r , is no greater than 20 mN m −1 .

5. The method of claim 2 , wherein the measured receding surface energy, γ sv,r , is no greater than 15 mN m −1 .

6. The method of claim 1 , further comprising measuring a surface energy of a coating including a polymer and nanoparticles prior to selecting.

7. The method of claim 1 , wherein the coating is a fingerprint-resistant coating.

8. The method of claim 1 , wherein the coating is transparent and optically clear.

9. The method of claim 8 , wherein the surface is transparent.

10. The method of claim 1 , wherein the fluoropolymer is fluorodecyl polyhedral oligomeric silsesquioxane (fluorodecyl POSS).

11. The method of claim 1 , wherein contacting the mixture with the surface includes spin coating.

12. The method of claim 1 , wherein the polymer is a poly(ethyl methacrylate) (PEMA).

13. The method of claim 1 , wherein the polymer is a poly(butyl methacrylate) (PBMA).

Assignees

• Massachusetts Inst Technology
• Us Air Force

Inventors

• Meuler Adam J
• Cohen Robert E
• Mckinley Gareth H
• Mabry Joseph M

Classifications

• C08K5/549

  containing silicon in a ring · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D5/1625 Primary

  organic · CPC title

• C09D7/1216

  Chemistry & Metallurgy · mapped topic