Recyclable enhanced performance carbon fiber reinforced polymers

Patent metadata

Field	Value
Publication number	US-12115701-B2
Application number	US-202017080998-A
Country	US
Kind code	B2
Filing date	Oct 27, 2020
Priority date	Feb 21, 2020
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A method of recycling fiber reinforced polymers includes grinding used fiber reinforced polymers material to produce ground particles, functionalizing the ground particles to produce functionalized particles, dispersing the functionalized particles into a base resin, dispensing the resin with functionalized particles into one or more layers of continuous fiber mats, molding the resin with functionalized particles and the continuous fiber mats into a form of a desired part, and curing the form to produce the part. The used fiber reinforced polymer materials may be carbon fiber reinforced polymers or glass fiber reinforced polymer materials.

First claim

What is claimed is:

1. A method of recycling fiber reinforced polymers, comprising:
grinding used fiber reinforced polymer material to produce ground particles;
functionalizing the ground particles to produce functionalized particles, wherein functionalizing the ground particles comprises an indirect process involving generating a functional group onto cured epoxy resin and reacting the functional group with a reagent;
dispersing the functionalized particles into a base resin;

dispensing the resin with functionalized particles into one or more layers of continuous fiber mats;
molding the resin with functionalized particles and the continuous fiber mats into a form of a desired part; and
curing the form to produce the part.

2. The method as claimed in claim 1 , wherein grinding the used fiber reinforced polymer material comprises grinding at least one material from the group consisting of: ground fiber composite particles including at least one of continuous, discontinuous, and powder fiber; polymer fiber reinforced particles; carbon fiber reinforced polymers; carbon composite particles; heat-resistant synthetic light-weight fiber; ceramic fiber composite particles; and glass fiber reinforced particles.

3. The method as claimed in claim 1 , wherein the continuous fiber mats is selected from the group consisting of: continuous carbon fiber; glass fiber; silicon carbide, aluminum oxide, and heat-resistant synthetic light-weight fiber fiber mats.

4. The method as claimed in claim 1 , wherein the indirect process comprises acidic cleavage.

5. The method as claimed in claim 1 , wherein grinding comprises one selected from the group consisting of: grinding; ball milling; and high power planetary ball milling.

6. The method as claimed in claim 1 , wherein providing the ground particles comprises providing ground particles having a size in the range of 10 nm to 10 mm.

7. The method as claimed in claim 1 , wherein dispersing the functionalized particles comprises one selected from the group consisting of: shear mixing; centrifuge mixing; rheometer mixing; cutting and folding; compressive mixing; flow mixing; and sonication dispersion.

8. The method as claimed in claim 1 , wherein the resin comprises one of the group consisting of: epoxy resins having glass transition temperatures of at least 150° C.; resins having more than 2 functional groups per molecule; resins having 8 functional groups per molecule; and novolac resins.

9. The method as claimed in claim 1 , wherein the resin includes a fast curing agent comprising at least one of amino hardeners, a latent curing agent, or a catalyst.

10. The method as claimed in claim 1 , wherein dispensing the resin with functionalized particles into one or more layers of continuous fiber mats forms a pre-preg mat.

11. The method as claimed in claim 1 , wherein molding comprises one of the group consisting of: wet compression molding, resin transfer molding, wet lay-up processing, pultrusion and pre-preg processing.

12. A method of recycling fiber reinforced polymers, comprising:
grinding used fiber reinforced polymer material to produce ground particles;
functionalizing the ground particles to produce functionalized particles, wherein functionalizing the ground particles comprises a direct process of one of either transformation of chemical groups into cured epoxy, or transformation of chemical groups into new epoxy groups using reagents;
dispersing the functionalized particles into a base resin;

dispensing the resin with functionalized particles into one or more layers of continuous fiber mats;
molding the resin with functionalized particles and the continuous fiber mats into a form of a desired part; and
curing the form to produce the part.

13. The method as claimed in claim 12 , wherein grinding the used fiber reinforced polymer material comprises grinding at least one material from the group consisting of: ground fiber composite particles including at least one of continuous, discontinuous, and powder fiber; polymer fiber reinforced particles; carbon fiber reinforced polymers; carbon composite particles; heat-resistant synthetic light-weight fiber; ceramic fiber composite particles; and glass fiber reinforced particles.

14. The method as claimed in claim 12 , wherein the continuous fiber mats is selected from the group consisting of: continuous carbon fiber; glass fiber; silicon carbide, aluminum oxide, and heat-resistant synthetic light-weight fiber mats.

15. The method as claimed in claim 12 , wherein grinding comprises one selected from the group consisting of: grinding; ball milling; and high power planetary ball milling.

16. The method as claimed in claim 12 , wherein dispersing the functionalized particles comprises one selected from the group consisting of: shear mixing; centrifuge mixing; rheometer mixing; cutting and folding; compressive mixing; flow mixing; and sonication dispersion.

17. The method as claimed in claim 12 , wherein the resin comprises one of the group consisting of: epoxy resins having glass transition temperatures of at least 150° C.; resins having more than 2 functional groups per molecule; resins having 8 functional groups per molecule; and novolac resins.

18. The method as claimed in claim 12 , wherein the resin includes a fast curing agent comprising at least one of amino hardeners, a latent curing agent, or a catalyst.

19. The method as claimed in claim 12 , wherein dispensing the resin with functionalized particles into one or more layers of continuous fiber mats forms a pre-preg mat.

20. The method as claimed in claim 12 , wherein molding comprises one of the group consisting of: wet compression molding, resin transfer molding, wet lay-up processing, pultrusion and pre-preg processing.

Assignees

• Palo Alto Res Ct Inc
• Xerox Corp

Inventors

• Iftime Gabriel
• Wei Junhua
• Unidad Jerome
• Pandey Rahul
• Garner Sean Roark

Classifications

• C08L2207/20

  Recycled plastic · CPC title

• C08L63/00 Primary

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• B29B2017/0484

  Grinding tools, roller mills or disc mills · CPC title

• B29B17/0036

  of large particles, e.g. beads, granules, pellets, flakes, slices · CPC title

• B29K2105/06

  containing reinforcements, fillers or inserts · CPC title