Encapsulated polymer nanocomposite for efficient crack repair and monitoring of cement, rock, and other brittle materials

Patent metadata

Field	Value
Publication number	US-10370305-B1
Application number	US-201715681981-A
Country	US
Kind code	B1
Filing date	Aug 21, 2017
Priority date	Aug 19, 2016
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

The present invention concerns compositions and methods of using the same that provide encapsulated polymer nanocomposites for efficient crack repair and monitoring of a cement-substrate interface.

First claim

What is claimed is:

1. A microencapsulated crack arrest material comprising: a polymer matrix incorporating one or more microcapsules, said microcapsules rupture in response to a predetermined humidity gradient include materials that initiate cross-linking when contacting a catalyst.

2. The material of claim 1 wherein said microcapsules rupture in response to a predetermined humidity gradient and a predetermined temperature gradient.

3. The material of claim 1 wherein said microcapsules include dicyclopentadiene to initiate polymer cross-linking when contacting a catalyst.

4. The material of claim 1 wherein said microcapsules rupture to release their contents to react with a catalyst in response a predetermined temperature gradient at one or more crack tips and bonds to the crack tip surface to prevent crack propagation.

5. The material of claim 1 wherein said microcapsules include one or more materials from the group comprising: graphene nanoparticles, Novolac-epoxy, Novolac-epoxy incorporating carbon nanotubes, siloxane-epoxy incorporating MWCNTs; BNTs; MWCNTs or nanoalumina, methyl methacrylate, methyl methacrylate incorporating nanoalumina, methyl methacrylate incorporating MWCNTs.

6. The material of claim 5 wherein said carbon nanotubes are adapted to disperse homogeneously in the matrix.

7. The material of claim 5 wherein said carbon nanotubes are chemically modified to have an affinity toward solvent molecules, polymer matrices or generic reactants.

8. The material of claim 1 wherein said microcapsules incorporate magnetic nanoparticles.

9. The material of claim 1 further including one or more catalysts such as bis(tricyclohexylphosphine) benzylidine ruthenium (IV) dichloride.

10. The material of claim 1 further including nanomaterials that enable ultrasonic monitoring of crack propagation and crack arrest.

11. A microencapsulated crack arrest material comprising: a polymer matrix incorporating one or more microcapsules, said microcapsules incorporate magnetic nanoparticles and rupture in response to a predetermined humidity.

12. The material of claim 11 wherein said microcapsules rupture in response to a predetermined humidity gradient and a predetermined temperature gradient.

13. The material of claim 11 wherein said microcapsules include materials that initiate polymer cross-linking when contacting a catalyst.

14. The material of claim 13 wherein said microcapsules include dicyclopentadiene to initiate polymer cross-linking when contacting a catalyst.

15. The material of claim 11 wherein said microcapsules rupture to release their contents to react with a catalyst in response a predetermined temperature gradient at one or more crack tips and bonds to the crack tip surface to prevent crack propagation.

16. The material of claim 11 wherein said microcapsules include one or more materials from the group comprising: graphene nanoparticles, Novolac-epoxy, Novolac-epoxy incorporating carbon nanotubes, siloxane-epoxy incorporating MWCNTs; BNTs; MWCNTs or nanoalumina, methyl methacrylate, methyl methacrylate incorporating nanoalumina, methyl methacrylate incorporating MWCNTs.

17. The material of claim 16 wherein said carbon nanotubes are adapted to disperse homogeneously in the matrix.

18. The material of claim 16 wherein said carbon nanotubes are chemically modified to have an affinity toward solvent molecules, polymer matrices or generic reactants.

19. The material of claim 11 further including one or more catalysts such as bis(tricyclohexylphosphine) benzylidine ruthenium (IV) dichloride.

20. The material of claim 11 further including nanomaterials that enable ultrasonic monitoring of crack propagation and crack arrest.

Assignees

• Stc Unm

Inventors

• Taha Mahmoud Reda
• Stormont John
• Matteo Edward N

Classifications

• C09K8/44

  containing organic binders only · CPC title

• C09K8/428

  for squeeze cementing, e.g. for repairing · CPC title

• C04B2111/00008

  Obtaining or using nanotechnology related materials · CPC title

• C04B40/0633

  Chemical separation of ingredients, e.g. slowly soluble activator · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title