Tailorable surface topology for antifouling coatings

Patent metadata

Field	Value
Publication number	US-10696849-B2
Application number	US-201715671693-A
Country	US
Kind code	B2
Filing date	Aug 8, 2017
Priority date	Aug 8, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Embodiments are directed to a method of making an antifouling and bactericidal coating with tailorable surface topology. The method includes depositing a layer of branched polyethyleneimine (BPEI) and diamino-functionalized poly(propylene oxide) (PPO) in a mixture of water and organic solvent on a substrate to form a layer of BPEI/PPO. The method includes depositing a layer of glyoxal in a water-containing solution on the layer of BPEI/PPO. The method further includes curing the layer of BPEI/PPO and layer of glyoxal to form a homogenous, glyoxal crosslinked BPEI/PPO coating, where the curing induces local precipitation and alteration of the glyoxal crosslinked BPEI/PPO coating to provide a textured surface.

First claim

What is claimed is:

1. A method of making an antifouling and bactericidal coating with tailorable surface topology, the method comprising:
functionalizing a substrate with NH 2 moieties;
depositing, subsequent to functionalizing the substrate, a layer of branched polyethyleneimine (BPEI) and diamino-functionalized poly(propylene oxide) (PPO) in a mixture of water and organic solvent on the substrate to form a layer of BPEI/PPO;
depositing a layer of glyoxal in a water-containing solution on the layer of BPEI/PPO; and
curing the layer of BPEI/PPO and layer of glyoxal to form a homogenous, glyoxal crosslinked BPEI/PPO coating;
where the curing induces local precipitation and alteration of a surface topology of the glyoxal crosslinked BPEI/PPO coating to provide a textured surface.

2. The method of claim 1 , where the organic solvent is isopropanol.

3. The method of claim 1 , where the water-containing solution is a mixture of isopropanol and water.

4. The method of claim 1 , where the homogenous, glyoxal crosslinked BPEI/PPO coating includes positively charged quaternary amines that provide bactericidal properties.

5. The method of claim 1 , where the textured surface exhibits altered surface topology on the nanoscale or the microscale.

6. The method of claim 1 further comprising depositing one or more additional layers of BPEI/PPO and one or more layers of glyoxal before curing.

7. The method of claim 1 , wherein depositing the layer of BPEI/PPO and the layer of glyoxal is by spray-coating.

Assignees

• IBM
• Agency Science Tech & Res
• Agency For Science Tech

Inventors

• Cahan Amos
• Ding Xin
• Fevre Mareva B
• Hedrick James L
• Liang zhen chang
• Park Nathaniel H
• Van Kessel Theodore G
• Wojtecki Rudy J
• Yang Yi Yan

Classifications

• A01N25/10

  Macromolecular compounds · CPC title

• B05D1/005

  Spin coating · CPC title

• C09D5/1681

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

• G03F7/0002

  Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping · CPC title

• B29C39/38

  Heating or cooling · CPC title