Nanocomposite coating system via one-step co-assembly

Patent metadata

Field	Value
Publication number	US-12509596-B2
Application number	US-202017635773-A
Country	US
Kind code	B2
Filing date	Oct 16, 2020
Priority date	Oct 21, 2019
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

The invention relates to a nanocomposite coating system that exhibits superior barrier properties for reducing the ingress of unwanted guest species such as moisture (e.g., water vapor) and a facile method for preparing the same nanocoating system on an industrial scale. The current coating materials are able to reduce the overall ingress of unwanted guest species in a substantial improvement over the prior art.

First claim

The invention claimed is:

1 . A nanocomposite coating composition, comprising: a polymer binder in an amount of 50 weight %; graphene oxide having a first aspect ratio in an amount of 0.01 to 10 weight %; and at least one montmorillonite filler having a second aspect ratio in an amount of 40 to 49.99 weight %, wherein the weight % is based on a total weight of the nanocomposite coating composition; and wherein the first aspect ratio is higher than the second aspect ratio.

2 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition is crosslinkable.

3 . The nanocomposite coating composition of claim 1 , wherein the polymer binder is selected from the group consisting of poly(vinyl alcohol), polyvinylpyrrolidone, poly(acrylic acid), poly(2-oxazoline), polyethyleneimine, and polyacrylamide.

4 . The nanocomposite coating composition of claim 1 , wherein: the polymer binder is present in an amount of 50 weight %; the graphene oxide is present in an amount of 0.01 weight %; and the at least one montmorillonite filler is present in an amount of 49.99 weight %, wherein the weight % is based on a total weight of the nanocomposite coating composition.

5 . An article comprising the nanocomposite coating composition of claim 1 .

6 . The article of claim 5 , wherein the article possesses a water vapor transmission rate value of below about 25 gm/m 2 /day.

7 . The nanocomposite coating composition of claim 1 , wherein the first aspect ratio is greater than a factor of 500.

8 . The nanocomposite coating composition of claim 3 , wherein the polymer binder is poly(vinyl alcohol).

9 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses a water vapor transmission rate value of below about 25 gm/m 2 /day.

10 . The nanocomposite coating composition of claim 9 , wherein the water vapor transmission rate value is below about 17 gm/m 2 /day.

11 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses a water vapor transmission rate value of from 0.3 gm/m 2 /day to 3.6 gm/m 2 /day.

12 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses an oxygen transmission rate value of below about 0.2 cc/m 2 /day.

13 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses an oxygen transmission rate value of from 0.0007 cc/m 2 /day to 0.0945 cc/m 2 /day.

14 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition has a thickness of from 263 nm to 655 nm.

15 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses an oxygen permeability of from 4.5850×10 −7 cm 3 ·mm/m 2 ·day·atm to 2.15×10 −5 cm 3 ·mm/m 2 ·day·atm.

16 . The nanocomposite coating composition of claim 1 , wherein the nanocomposite coating composition possesses a water vapor permeability of from 0.0024×10 −11 gcm(STP)cm/cm 2 ·s·Pa to 0.0187×10 −11 gcm (STP) cm/cm 2 ·s·Pa.

17 . The nanocomposite coating composition of claim 1 , wherein: the polymer binder is present in an amount of 50 weight %; the graphene oxide is present in an amount of 10 weight %; and the at least one montmorillonite filler is present in an amount of 40 weight %, wherein the weight % is based on a total weight of the nanocomposite coating composition.

18 . The nanocomposite coating composition of claim 1 , wherein: the polymer binder is present in an amount of 50 weight %; the graphene oxide is present in an amount of 1 weight %; and the at least one montmorillonite filler is present in an amount of 49 weight %, wherein the weight % is based on a total weight of the nanocomposite coating composition.

19 . A process for creating a nanocomposite coating barrier on a surface of an article to resist intrusion by water and/or oxygen, comprising:
applying the nanocomposite coating composition of claim 1 to the surface.

20 . The process of claim 19 , wherein applying consists of at least one of the following: dip-coating, doctor blading, spin coating, rotational coating, spray coating, or roll-to-roll coating.

Assignees

• Univ Connecticut
• Kaneka Americas Holding
• Kaneka Corp

Inventors

• Sun Luyi
• Lachance Anna Marie
• Zhou Tianlei
• Lim Young

Classifications

• C09D129/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08K2201/016

  Additives defined by their aspect ratio · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K3/346

  Clay · CPC title

• C09D7/61

  inorganic · CPC title