Prevention of hydrophobic dewetting through nanoparticle surface treatment

Patent metadata

Field	Value
Publication number	US-2017348728-A1
Application number	US-201715624152-A
Country	US
Kind code	A1
Filing date	Jun 15, 2017
Priority date	Feb 23, 2012
Publication date	Dec 7, 2017
Grant date	—

Abstract

Disclosed in this specification is a method for coating a substrate to prevent dewetting. A suspension of nanoparticles is deposited onto the substrate to produce a nanoparticle layer. The nanoparticle layer is then coated with a monomer. The monomer polymerizes on the nanoparticle layer to produce a polymeric layer.

First claim

What is claimed is:

1 . A method for coating a substrate to prevent dewetting, the method comprising the sequential steps of:
depositing a suspension of nanoparticles in a liquid directly onto a surface of a substrate; permitting the liquid to evaporate to produce a pre-deposited nanoparticle layer directly on the surface; coating the pre-deposited nanoparticle layer with a monomer such that the monomer is coated directly on the pre-deposited nanoparticle layer; and allowing the monomer to thermally polymerize at a temperature above 80° C. to produce a polymeric layer directly on the pre-deposited nanoparticle layer.

2 . The method as recited in claim 1 , wherein the substrate is selected from the group consisting of aluminum, copper, silicon, a metal layer on glass and a metal layer on a flexible polymer.

3 . The method as recited in claim 1 , wherein the nanoparticles are ceramic nanoparticles with a size of from about 8 nm to about 50 nm.

4 . The method as recited in claim 3 , wherein the ceramic nanoparticles comprise a ceramic material selected from the group consisting of barium titanate, strontium titanate, barium strontium titanate, silica, and metal-oxide.

5 . The method as recited in claim 1 , wherein the nanoparticles are metal nanoparticles with a size of from about 8 nm to about 50 nm.

6 . The method as recited in claim 5 , wherein the metal nanoparticles comprise a metallic material selected from the group consisting of silver, gold, aluminum, and copper.

7 . A method for coating a substrate to prevent dewetting, the method comprising the sequential steps of:
depositing a suspension of nanoparticles in a liquid directly onto a surface of a metal substrate; permitting the liquid to evaporate to produce a pre-deposited nanoparticle layer on the surface; coating the pre-deposited nanoparticle layer with a furfuryl alcohol such that the furfuryl alcohol is coated directly on the pre-deposited nanoparticle layer; allowing the furfuryl alcohol to thermally polymerize at a temperature above 80° C. to produce a polymeric layer directly on the pre-deposited nanoparticle layer.

8 . The method as recited in claim 7 , wherein the nanoparticles are ceramic nanoparticles with a size of from about 1 nm to about 1000 nm.

9 . The method as recited in claim 7 , wherein the nanoparticles are ceramic nanoparticles with a size of from about 8 nm to about 50 nm.

10 . The method as recited in claim 7 , wherein the step of permitting the liquid to evaporate comprises heating the liquid to a temperature of at least about 80° C.

11 . The method as recited in claim 7 , wherein the step of depositing the suspension of nanoparticles comprises depositing the suspension in a predetermined pattern.

12 . The method as recited in claim 7 , wherein the step of depositing the suspension of nanoparticles comprises masking to provide a predetermined pattern.

13 . A coated substrate formed by the method as recited in claim 7 .

14 . A layered substrate that resists dewetting, the layered substrate comprising:
a metal substrate; a nanoparticle layer disposed directly on the metal substrate, the nanoparticle layer being less than about five hundred nanometers thick and comprising nanoparticles with a size of from about 1 nm to about 1000 nm; a polymeric layer disposed directly on the nanoparticle layer, the polymeric layer being the reaction product of a thermal polymerization reaction of a monomer, the polymerization reaction occurring on the nanoparticle layer, wherein the monomer and the polymeric layer have different degrees of hydrophobicity.

15 . The layered substrate as recited in claim 14 , wherein the monomer is furfuryl alcohol and the polymeric layer comprises polyfurfuryl alcohol.

16 . The layered substrate as recited in claim 15 , wherein the metal substrate is selected from the group consisting of aluminum, copper, silicon, a metal layer on glass and a metal layer on a flexible polymer.

Assignees

• Univ City New York Res Found

Inventors

• Van Tassell Barry
• Steingart Daniel
• Leland Eli S
• Chando Paul
• Huang Limin
• O'Brien Stephen

Classifications

• Y10T428/31678

  Of metal · CPC title

• B05D3/00

  Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials (successively applying liquids or other fluent materials B05D1/36; drying ovens F26B) · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B05D5/04

  to obtain a surface receptive to ink or other liquid (B05D5/02, {B41M5/52} take precedence) · CPC title

• Y10S427/00

  Coating processes · CPC title