Thick Growth Nanocoatings

Patent metadata

Field	Value
Publication number	US-2016107192-A1
Application number	US-201514918529-A
Country	US
Kind code	A1
Filing date	Oct 20, 2015
Priority date	Oct 20, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A layer-by-layer deposition process for a thin film having a polyelectrolyte and a complementary species includes calibrating a buffered polyelectrolyte solution and a buffered rinse solution, depositing a polyelectrolyte layer on a substrate, and depositing a complementary species layer on the polyelectrolyte layer. Depositing a polyelectrolyte layer includes applying the buffered polyelectrolyte solution to the substrate and applying the buffered rinse solution to the substrate after the buffered polyelectrolyte solution has been applied. Depositing a complementary species layer includes applying a complementary species mixture to the substrate and applying a complementary species rinse solution to the substrate after the complementary species mixture has been applied.

First claim

What is claimed is:

1 . A layer-by-layer deposition process for a thin film having a polyelectrolyte and a complementary species, comprising:
calibrating a buffered polyelectrolyte solution and a buffered rinse solution; depositing a polyelectrolyte layer on a substrate, including:
applying the buffered polyelectrolyte solution to the substrate;
applying the buffered rinse solution to the substrate after the buffered polyelectrolyte solution has been applied;
depositing a complementary species layer on the polyelectrolyte layer, including:
applying a complementary species mixture to the substrate; and
applying a complementary species rinse solution to the substrate after the complementary species mixture has been applied.

2 . The process of claim 1 , further comprising repeating the polyelectrolyte deposition and complementary species deposition alternately.

3 . The process of claim 1 , wherein:
the polyelectrolyte has a first net charge; the complementary species has a second net charge opposite to the first net charge; and the complementary species comprises a complementary polyelectrolyte, a nano-object, or a colloidal particle.

4 . The process of claim 1 , wherein calibrating the buffered electrolyte solution and the buffered rinse solution further comprises:
selecting a buffer, a buffer concentration, and a buffer pH for the buffered polyelectrolyte solution and the buffered rinse solution; adding the buffer to a polyelectrolyte solute to form the buffered polyelectrolyte solution at the buffer concentration; adding the buffer to a rinse solute to form the buffered rinse solution at the buffer concentration; adjusting a buffered polyelectrolyte solution pH to the buffer pH; and adjusting a buffered rinse solution pH to the buffer pH.

5 . The process of claim 4 , wherein the polyelectrolyte comprises poly(allylamine), polymelamine, poly(melamine-co-formaldehyde), polyvinylpyridine, poly(allylamine hydrochloride) (PAH), poly(2-ethyl-2-oxazoline), poly(diallyl dimethyl ammonium chloride) (polyDADMAC), and polyethylenimine (PEI), poly(acrylic acid) salts, poly(vinyl sulfate), poly(methacrylic acid), poly(sodium styrene sulfonate), chitosan, or collagen.

6 . The process of claim 4 , wherein the buffer comprises tris(hydroxymethyl)aminomethane (tris) buffer, N-tris(hydroxymethyl) methlylglycine (tricine), N,N-bis(2-hydroxyethyl)glycine (bicine), or 3-{[tris(hydroxymethyl)methyl]amino}propanesulfonic acid (TAPS)

7 . The process of claim 4 , wherein the complementary species comprises sodium montmorillonite, hectorite, saponite, bentonite, halloysite, vermiculite, carbon nanotubes, or graphene.

8 . The process of claim 4 , wherein:
the polyelectrolyte is a cationic polyelectrolyte; the polyelectrolyte solution is cationic; the complementary species is a clay; and the complementary species mixture is anionic.

9 . The process of claim 4 , wherein:
the buffer is tris; the cationic polyelectrolyte is one of poly(allylamine) hydrochloride and chitosan; and the complementary species is one of montmorillonite clay and vermiculite clay.

10 . A layer-by-layer process for creating a thin film, comprising:
providing a buffered polyelectrolyte solution, a buffered rinse solution, a complementary species mixture, and a complementary rinse solution, wherein:
the buffered polyelectrolyte solution includes a polyelectrolyte and a buffer;
the buffered rinse solution includes the buffer;
the complementary species mixture includes a complementary species;
applying the buffered polyelectrolyte solution to a substrate to create a polyelectrolyte layer; applying the buffered rinse solution to the substrate after the buffered polyelectrolyte solution has been applied; applying the complementary species mixture to the substrate after the buffered rinse solution has been applied to create a complementary species layer; and applying the complementary rinse solution to the substrate after the complementary species mixture has been applied.

11 . The process of claim 10 , further comprising repeating the application of the buffered polyelectrolyte solution, the application of the buffered rinse solution, the application of the complementary species mixture, and the application of the complementary rinse solution.

12 . The process of claim 10 , wherein:
the polyelectrolyte layer is cationic; and the complementary species layer is anionic.

13 . The process of claim 12 , wherein:
the polyelectrolyte is cationic; and the complementary species is an anionic clay nanoplatelet.

14 . The process of claim 10 , wherein the polyelectrolyte comprises poly(allylamine), polymelamine, poly(melamine-co-formaldehyde), polyvinylpyridine, poly(allylamine hydrochloride) (PAH), poly(2-ethyl-2-oxazoline), poly(diallyl dimethyl ammonium chloride) (polyDADMAC), and polyethylenimine (PEI), poly(acrylic acid) salts, poly(vinyl sulfate), poly(methacrylic acid), poly(sodium styrene sulfonate), chitosan, or collagen.

15 . The process of claim 10 , wherein the buffer comprises tris(hydroxymethyl)aminomethane (tris) buffer, N-tris(hydroxymethyl) methlylglycine (tricine), N,N-bis(2-hydroxyethyl)glycine (bicine), or 3-{[tris(hydroxymethyl)methyl]amino}propanesulfonic acid (TAPS)

16 . The process of claim 10 , wherein the complementary species comprises sodium montmorillonite, hectorite, saponite, bentonite, halloysite, vermiculite, carbon nanotubes, or graphene.

17 . The process of claim 10 , wherein:
the polyelectrolyte has a first net charge; the complementary species has a second net charge opposite to the first net charge; and the complementary species comprises a complementary polyelectrolyte, a nano-object, or a colloidal particle.

18 . The process of claim 10 , wherein:
the buffer is tris; the cationic polyelectrolyte comprises poly(allylamine) hydrochloride or chitosan; and the complementary species comprises montmorillonite clay or vermiculite clay.

19 . The process of claim 10 , wherein:
the buffered polyelectrolyte solution and the buffered rinse solution are at or near a first pH; and the complementary species mixture and the complementary rinse solution are at or near a second pH.

20 . The process of claim 19 , wherein the buffer is at or near a first concentration in the buffered polyelectrolyte solution and the buffered rinse solution.

Assignees

• Texas A&M System Technology Commercialization
• Texas A & M Univ Sys

Inventors

• Grunlan Jaime
• Guin Tyler

Classifications

• B05D7/52 Primary

  Two layers · CPC title

• B05D7/54 Primary

  No clear coat specified · CPC title

• B05D7/58

  No clear coat specified · CPC title

• B05D1/185

  applying monomolecular layers (B05D1/204 takes precedence) · CPC title