Graphene-based nanomaterial epoxy layer for cemetitious surface

Patent metadata

Field	Value
Publication number	US-2026070850-A1
Application number	US-202519391296-A
Country	US
Kind code	A1
Filing date	Nov 17, 2025
Priority date	Jul 6, 2023
Publication date	Mar 12, 2026
Grant date	—

Abstract

A method for enhancing adhesion of a curable composition to a cement-based object includes applying a graphene oxide (GO) containing dispersion on a surface of the cement-based object thereby forming a GO-treated surface on the cement-based object. The method includes disposing the curable composition on the GO-treated surface of the cement-based object. The method includes curing the curable composition by heating thereby forming a GO interfacial layer and an epoxy resin layer. The GO interfacial layer is between the surface of the cement-based object and the epoxy resin layer. The curable composition includes an epoxy monomer and an amine curing agent. The GO interfacial layer has a thickness of from 0.1 to 10 nanometers (nm).

First claim

1 - 11 . (canceled)

12 . The method of claim 18 , wherein a mole ratio of the epoxy monomer to the amine curing agent is in a range of 5:1 to 1:1.

13 . The method of claim 18 , wherein after the curing the epoxy resin of the epoxy resin layer has a cross-linking degree of 60 to 95% based on a total number of the epoxy monomer and the amine curing agent.

14 . The method of claim 18 , wherein the epoxy monomer is a polyhydric phenol glycidyl ether, and wherein the polyhydric phenol glycidyl ether comprises diglycidyl ether bisphenol-A (DGEBA).

15 . The method of claim 18 , wherein the amine curing agent is a phenylenediamine, and wherein the phenylenediamine comprises m-phenylenediamine (m-PDA).

16 . (canceled)

17 . The method of claim 18 , wherein the adhesion of the epoxy resin layer formed from the curable composition to the cement-based object is improved compared to that of an epoxy resin layer formed from a composition in the absence of the GR when exposed to a condition selected from the group consisting of a dry condition, a wet condition, and a salt-containing condition, wherein the epoxy resin layer has a water diffusion coefficient of 0.05×10 −12 to 0.09×10 −12 meter square per second (m 2 ·s −1 ), and wherein the epoxy resin layer has a chloride ions diffusion coefficient of 0.04×10 −12 to 0.13×10 −12 m 2 ·s −1 .

18 . A method for enhancing adhesion of a graphene (GR) containing composition to a cement-based object, comprising:
mixing an epoxy monomer, an amine curing agent, and a GR nanomaterial to form the GR-containing composition; disposing the GR-containing composition on a surface of the cement-based object; and curing the GR-containing composition by heating thereby forming a modified epoxy resin layer on the surface of the cement-based object; and wherein the GR nanomaterial has a thickness of 0.2 to 1 nm; and wherein the GR nanomaterial is present in the GR-containing composition at a concentration of 0.01 to 10 wt. % by weight.

19 . The method of claim 18 , wherein one or more hydrogen atoms in the hydroxyl groups of calcium silicate (H CSH ) particles of the cement-based object interact with one or more carbon atoms of the GR nanomaterial in the modified epoxy resin (C GR ) resulting in the formation of one or more H CSH —C GR bonds.

20 . The method of claim 19 , wherein the one or more H CSH —C GR bonds have an average length of 2.5 to 2.6 Å.

21 . The method of claim 18 , wherein the surface of the cement-based object is free from moisture during the disposing and curing; and
wherein the curing includes heating to a temperature of 798 K followed by cooling to a temperature of 298 K.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Bahraq Ashraf Awadh
• Alosta Mohammed Ali
• Obot Ime Bassey
• Al-Amoudi Omar Saeed Baghabra
• Awadh Tawfik Abdo Saleh
• Maslehuddin Mohammed

Classifications

• C04B41/5001

  with carbon or carbonisable materials · CPC title

• C09D7/63 Primary

  organic · CPC title

• C09D163/00

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

• C09D5/002

  Priming paints (C09D5/08 takes precedence) · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title