Coated non-conductive substrate

Patent metadata

Field	Value
Publication number	US-11945963-B2
Application number	US-201917058106-A
Country	US
Kind code	B2
Filing date	Jun 11, 2019
Priority date	Jun 15, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A non-conductive substrate being at least partially coated with a paint including reduced graphene oxide and a thermosetting polymer, the non-conductive substrate being directly coated by the paint, a method for the manufacture of this coated non-conductive substrate, methods for detecting leaks or strain deformation and the uses of said coated non-conductive substrate.

First claim

What is claimed is:

1. A coated non-conductive substrate comprising:
a non-conductive substrate being at least partially coated on at least one side with a paint including a reduced graphene oxide having a surface area below 300 m 2 ·gr −1 and at least one thermosetting polymer, the non-conductive substrate being directly coated by the paint.

2. The coated non-conductive substrate as recited in claim 1 wherein a lateral size of the reduced graphene oxide is between 1 and 80 μm.

3. The coated non-conductive substrate as recited in claim 1 wherein a weight percentage of oxygen in the reduced graphene oxide is between 2 and 20%.

4. The coated non-conductive substrate as recited in claim 1 wherein a concentration of the reduced graphene oxide in the paint is between 0.05 and 10% by weight.

5. The coated non-conductive substrate as recited in claim 1 wherein the thermosetting polymer is chosen from at least one of the group consisting of: epoxy resin, Polyester resin, Polyurethanes, Polyurea/polyurethane, Vulcanized rubber, Urea-formaldehyde, Melamine resin, Benzoxazines, Polyimides, Bismaleimides, Cyanate esters, polycyanurates, Furan, Silicone resins, Thiolyte and Vinyl ester resins and a mixture thereof.

6. The coated non-conductive substrate as recited in claim 1 wherein the non-conductive substrate is a textile or a plastic substrate.

7. The coated non-conductive substrate as recited in claim 1 wherein the non-conductive substrate is coated with paint strips to form an alternation between painted non-conductive substrate and non-painted non-conductive substrate.

8. A method for manufacture of the coated non-conductive substrate as recited in claim 1 , the method comprising the successive following steps:
A. mixing the reduced graphene oxide having a surface area below 300 m 2 ·gr −1 , a thermosetting monomer, a curing agent and optionally a solvent;
B. depositing the mixture on the non-conductive substrate; and
C. curing the mixture.

9. The method as recited in claim 8 wherein in step A), the solvent is chosen from at least one of the group consisting of: xylene, n-butanol, ethylbenzene, naphtha and a mixture thereof.

10. The method as recited in claim 8 wherein in step A), the curing agent is chosen from at least one of the group consisting of: polyamide, polyamide, phenols, amines and polyaddition isocyanate and a mixture thereof.

11. A method for detecting a leak with the coated non-conductive substrate as recited in claim 1 , the method comprising the following successive steps:
applying an electric voltage to the coated non-conductive substrate using an electronic system; and
detecting a leak when an electrical circuit is formed in the coated non-conductive substrate.

12. The method as recited in claim 11 wherein the electronic system includes a power supply system and an emitter capable of indicating the leak.

13. A method for detecting a strain deformation with the coated non-conductive substrate as recited in claim 1 , the method comprising the following successive steps:
applying an electric voltage to the coated non-conductive substrate using an electronic system; and
measuring an electrical resistance variation after deformation of the coated non-conductive substrate.

14. The method as recited in claim 13 wherein the electronic system includes a battery and a power supply system.

15. The coated non-conductive substrate as recited in claim 1 , wherein
the non-conductive substrate is a geomembrane, a geotextile or a geosynthetic clay liner,
the reduced graphene oxide is in the form of nanoplatelets,
the lateral size of the reduced graphene oxide is between 40 and 80 μm, and
the weight percentage of oxygen in the reduced graphene oxide is between 2 and 10%, and the concentration of reduced graphene oxide in the paint is between 0.5 and 4% by weight.

16. The coated non-conductive substrate as recited in claim 2 wherein a lateral size of the reduced graphene oxide is between 60 and 80 μm.

17. The method as recited in claim 8 wherein
the non-conductive substrate is the geomembrane, the geotextile or the geosynthetic clay liner,
the reduced graphene oxide is in the form of nanoplatelets,
the lateral size of the reduced graphene oxide is between 40 and 80 μm,
the weight percentage of oxygen in the reduced graphene oxide is between 2 and 10%, and
the concentration of reduced graphene oxide in the deposited paint is between 0.5 and 4% by weight.

18. The coated non-conductive substrate as recited in claim 1 , wherein the reduced graphene oxide has a surface area below 290 m 2 ·gr −1 .

19. The coated non-conductive substrate as recited in claim 1 , wherein the reduced graphene oxide has a surface area above 200 m 2 ·gr −1 and below 290 m 2 ·gr −1 .

20. The method as recited in claim 8 , wherein the reduced graphene oxide has a surface area below 290 m 2 ·gr −1 .

21. The method as recited in claim 8 , wherein the reduced graphene oxide has a surface area above 200 m 2 ·gr −1 and below 290 m 2 ·gr −1 .

Assignees

• Arcelormittal

Inventors

• Alvarez-Alvarez Abel
• Perez Vidal Oscar
• Rodriguez Martinez Carlos Javier
• Fernandez Alvarez Jose Paulino
• Suarez Garcia Carlos
• Blanco Iglesias Hugo
• Melconmiguel Jorge

Classifications

• C09D163/00 Primary

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• G01B7/18

  using change in resistance · CPC title

• G01N27/125

  Composition of the body, e.g. the composition of its sensitive layer · CPC title

• H01M10/4228

  Leak testing of cells or batteries · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title