Method for manufacturing a composite material comprising a polymer and nanomaterials

Patent metadata

Field	Value
Publication number	US-12264223-B2
Application number	US-202217648997-A
Country	US
Kind code	B2
Filing date	Jan 26, 2022
Priority date	Jan 28, 2021
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

Method for manufacturing a composite material comprising a polymer and nanomaterials, the method comprising the following steps: dissolution of the polymer in a first solvent, whereby a first solution is obtained, dispersion of the nanomaterials in a second solvent, different from the first solvent, whereby a second solution is obtained, mixing of the two solutions, whereby a third solution is obtained, heating of the third solution so as to evaporate the second solvent, whereby a final solution is obtained, deposition of the final solution on a substrate and evaporation of the first solvent, the second solvent having a boiling point lower by at least 30° C. than that of the first solvent, and the viscosity of the final solution being equal to some 10% of the viscosity of the first solution.

First claim

What is claimed is:

1. Method for manufacturing a composite material comprising a polymer and nanomaterials, the method comprising the following steps:
a) dissolution of the polymer in a first solvent, whereby a first solution is obtained,
b) dispersion of the nanomaterials in a second solvent, different from the first solvent, whereby a second solution is obtained,
c) mixing of the two solutions, whereby a third solution is obtained,
d) heating of the third solution so as to totally evaporate the second solvent, whereby a final solution is obtained,
e) deposition of the final solution on a substrate or injection of the final solution into a mould and evaporation of the first solvent,
wherein the second solvent has a boiling point lower by at least 30° C. than that of the first solvent, and
and wherein the viscosity of the final solution is about 20% of the viscosity of the first solution.

2. Method according to claim 1 , wherein the second solvent has a boiling point lower by at least 50° C. than that of the first solvent.

3. Method according to claim 1 , wherein the first solvent has a boiling point above 100° C. and the second solvent has a boiling point below 90° C.

4. Method according to claim 1 , wherein the first solvent is chosen from among propylene glycol methyl ether acetates, ethyl lactates, xylene, anisole and cyclopentanone.

5. Method according to claim 1 , wherein the second solvent is chosen from among acetone, benzene, butanone, ethyl acetate, hexane, 2-propanol, chloroform, dichloroethane and dichloromethane.

6. Method according to claim 1 , wherein the first solvent is propylene glycol methyl ester acetate (PGMEA) and the second solvent is chloroform.

7. Method according to claim 1 , wherein the polymer is chosen from among polystyrenes, polyepoxides, poly(vinylidene fluorides), polymethacrylates and polyetherimides.

8. Method according to claim 1 , wherein the nanomaterials are nanoparticles with core-shell structure.

9. Method according to claim 8 , wherein the nanoparticles are nanoparticles formed of a metal core based on Cu, Ni, Co or Fe, coated by a layer of carbon.

10. Method according to claim 1 , wherein the nanomaterials are magnetic or ferroelectric.

11. Method according to claim 1 , wherein the nanomaterials are wide gap semiconductors.

12. Method according to claim 1 , wherein the nanomaterials are chosen from among nanosheets of hexagonal boron nitride (h-BN) and nanodiamonds.

13. Method according to claim 1 , wherein the second solvent is a chlorinated solvent and the nanomaterials are nitride-containing or carbon-containing.

14. Method according to claim 1 , wherein step b) is carried out under ultrasounds.

15. Method according to claim 1 , wherein the second solvent is a chlorinated solvent, the nanomaterials are nitride-containing or carbon-containing and step b) is carried out under ultrasounds.

16. Method according to claim 1 , wherein the viscosity of the final solution is about 10% of the viscosity of the first solution.

17. Method for manufacturing a composite material comprising a polymer and nanomaterials, the method comprising the following steps:
a) dissolution of the polymer in a first solvent, whereby a first solution is obtained,
b) dispersion of the nanomaterials in a second solvent, different from the first solvent, whereby a second solution is obtained,
c) mixing of the two solutions, whereby a third solution is obtained,
d) heating of the third solution so as to evaporate at least 10% by volume of the second solvent, whereby a final solution is obtained,
e) deposition of the final solution on a substrate or injection of the final solution into a mould and evaporation of the first solvent, and evaporation of the volume fraction of the second solvent not evaporated during step d),
wherein the second solvent has a boiling point lower by at least 30° C. than that of the first solvent,
wherein the viscosity of the final solution is about 20% of the viscosity of the first solution, and
and wherein substantially no portion of the first solvent is evaporated during step d).

Assignees

• Commissariat Energie Atomique

Inventors

• Viala Bernard

Classifications

• H01F1/147

  Alloys characterised by their composition {(treatment thereof for enhancing their electromagnetic properties C21D8/12)} · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K2201/01

  Magnetic additives · CPC title

• C08K2201/001

  Conductive additives · CPC title

• C08K2003/385

  Binary compounds of nitrogen with boron · CPC title