Treated plastic granules

Patent metadata

Field	Value
Publication number	US-11717989-B2
Application number	US-202017775122-A
Country	US
Kind code	B2
Filing date	Nov 12, 2020
Priority date	Nov 15, 2019
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

Preparing hybrid-treated plastic particles from waste plastic includes combining waste plastic particles with bio-oil to yield a mixture, irradiating the mixture with microwave radiation to yield oil-treated plastic particles, and contacting the oil-treated plastic particles with carbon-containing nanoparticles to yield hybrid-treated plastic particles. The hybrid-treated plastic particles have a bio-oil modified surface and a coating comprising carbon-containing nanoparticles on the bio-oil modified surface of the plastic particle. In some examples, a diameter of the plastic particle is in a range between 250 m and 750 m, and a thickness of the coating is in a range of 1 nm to 20 nm. A modified binder includes an asphalt binder or a concrete binder and a multiplicity of the treated plastic particles. The modified binder typically includes 5 wt % to 25 wt % of the hybrid-treated plastic particles.

First claim

What is claimed is:

1. A method of preparing treated plastic particles from waste plastic, the method comprising:
combining waste plastic particles with bio-oil to yield a mixture;
irradiating the mixture with microwave radiation to yield oil-treated plastic particles; and
contacting the oil-treated plastic particles with carbon-containing nanoparticles to yield hybrid-treated plastic particles, wherein the carbon-containing nanoparticles comprise graphene nanoparticles.

2. The method of claim 1 , wherein the waste plastic particles comprise mixed plastics.

3. The method of claim 2 , wherein the mixed plastics comprise mixed-color polyethylene terephthalate.

4. The method of claim 1 , wherein the bio-oil is derived from waste vegetable oil.

5. The method of claim 1 , wherein the waste plastic particles and the bio-oil are combined in a mass ratio in a range of 2:1 to 1:2.

6. The method of claim 1 , further comprising, after irradiating the mixture, allowing the mixture to cool and further irradiating the mixture to yield the oil-treated plastic particles.

7. The method of claim 1 , further comprising reducing a size of the oil-treated plastic particles before contacting the oil-treated plastic particles with the carbon-containing nanoparticles.

8. The method of claim 1 , wherein contacting the oil-treated plastic particles with the carbon-containing nanoparticles comprises coating the oil-treated plastic particles with the carbon-containing nanoparticles to yield a coating of the carbon-containing nanoparticles on the oil-treated plastic particles.

9. The method of claim 8 , wherein a thickness of the coating is in a range between 1 nm and 20 nm.

10. The method of claim 8 , wherein a thickness of the coating is in a range between 5 nm and 10 nm.

11. A method of preparing a modified binder, the method comprising:
combining the hybrid-treated plastic particles of claim 1 with a binder to yield the modified asphalt binder, wherein the binder comprises a concrete binder or an asphalt binder, and the modified binder comprises 5 wt % to 25 wt % of the hybrid-treated plastic particles.

12. The method of claim 11 , wherein the modified binder comprises 75 wt % to 95 wt % of the asphalt binder.

13. The method of claim 11 , wherein the modified binder comprises 10 wt % to 20 wt % of the hybrid-treated plastic particles and 80 wt % to 90 wt % of the asphalt binder.

14. A hybrid-treated plastic particle comprising:
a plastic particle having a bio-oil modified surface; and
a coating comprising carbon-containing nanoparticles on the bio-oil modified surface of the plastic particle, wherein the carbon-containing nanoparticles comprise graphene nanoparticles.

15. The hybrid-treated plastic particle of claim 14 , wherein a diameter of the plastic particle is in a range between 250 μm and 750 μm.

16. The hybrid-treated plastic particle of claim 14 , where a thickness of the coating is in a range of 1 nm to 20 nm.

17. A modified binder comprising:
a binder, wherein the binder comprises a concrete binder or an asphalt binder; and
a multiplicity of the hybrid-treated plastic particles of claim 14 ,
wherein the modified binder comprises 5 wt % to 25 wt % of the hybrid-treated plastic particles.

18. A composition comprising the modified binder of claim 17 , wherein the composition is a concrete composition or an asphalt composition.

19. The hybrid-treated plastic particle of claim 14 , where a thickness of the coating is in a range of 5 nm to 15 nm.

Assignees

• Univ Arizona State

Inventors

• Fini Elham
• Kabir Sk Faisal

Classifications

• B29B9/16 Primary

  Auxiliary treatment of granules · CPC title

• B29B13/08

  by using wave energy or particle radiation · CPC title

• C04B26/26

  Bituminous materials, e.g. tar, pitch {(C08L95/00 takes precedence)} · CPC title

• B29B2009/163

  Coating, i.e. applying a layer of liquid or solid material on the granule · CPC title

• C08K3/042

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