Heterogeneous surfaces

Patent metadata

Field	Value
Publication number	US-9689631-B2
Application number	US-201414519931-A
Country	US
Kind code	B2
Filing date	Oct 21, 2014
Priority date	Jun 3, 2012
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Condensation can be an important process in both emerging and traditional power generation and water desalination technologies. Superhydrophobic nanostructures can promise enhanced condensation heat transfer by reducing the characteristic size of departing droplets via a surface-tension-driven mechanism. A superhydrophobic surface can include a heterogeneous surface.

First claim

What is claimed is:

1. A superhydrophobic surface comprising:
a patterned substrate having a nanostructured surface including a plurality of first regions distributed in a second hydrophobic region, the first regions including a surface modifying layer and the second hydrophobic region including a material infused into regions of the substrate.

2. The surface of claim 1 , wherein the patterned substrate includes a periodic structure on the surface of the substrate that form the regions of the substrate into which the material is infused.

3. The surface of claim 1 , wherein the first regions are associated with the pattern of the patterned substrate.

4. The surface of claim 3 , wherein the surface modifying layer includes a functionalized silane.

5. The surface of claim 4 , wherein the surface modifying layer includes a plurality of scattered hydrophilic sites while exhibiting overall hydrophobicity.

6. The surface of claim 1 , wherein the material is an oil.

7. The surface of claim 6 , wherein the oil is a fluorinated oil.

8. A method of increasing nucleation density on a surface comprising:
infusing a material into regions of a patterned substrate to form a nanostructured surface including a plurality of first regions distributed in a second hydrophobic region, the first regions including a surface modifying layer and the second hydrophobic region including a material infused into regions of the substrate.

9. The method of claim 8 , wherein the patterned substrate includes a periodic structure on the surface of the substrate that form the regions of the substrate into which the material is infused.

10. The method of claim 8 , wherein the first regions are associated with the pattern of the patterned substrate.

11. The method of claim 8 , wherein the surface modifying layer includes a functionalized silane.

12. The method of claim 11 , wherein the surface modifying layer includes a plurality of scattered hydrophilic sites while exhibiting overall hydrophobicity.

13. The method of claim 8 , wherein the material is an oil.

14. The method of claim 13 , wherein the oil is a fluorinated oil.

Assignees

• Massachusetts Inst Technology

Inventors

• Xiao Rong
• Milikovic Nenad
• Wang Evelyn N
• Enright Ryan

Classifications

• Y10T428/24355

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

• C09D5/1681

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

• Y10T428/24851

  Intermediate layer is discontinuous or differential · CPC title

• B32B5/00

  Layered products characterised by the non- homogeneity or physical structure {, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts} · CPC title

• B05D5/02

  to obtain a matt or rough surface · CPC title