Method for manufacturing metal/polymer hybrid nanoparticles with narrow size distribution by miniemulsion polymerisation

Patent metadata

Field	Value
Publication number	US-2020261972-A1
Application number	US-202016787087-A
Country	US
Kind code	A1
Filing date	Feb 11, 2020
Priority date	Feb 18, 2019
Publication date	Aug 20, 2020
Grant date	—

Abstract

Method for manufacturing nanoparticles comprising a metallic core coated with a layer of polymer material comprising the following steps:
a) preparing a water-in-oil emulsion comprising droplets of an aqueous phase, dispersed in an organic phase, b) adding nanoparticles comprising a metallic core coated with a shell of carbonaceous material, whereby nanoparticles trapped in the droplets are obtained, c) adding precursor monomers of the polymer material, and d) adding a polymerisation initiator, adding the precursor monomers and the polymerisation initiator resulting in polymerisation of the monomers, whereby nanoparticles coated with a layer of polymer material dispersed in the organic phase are obtained.

First claim

1 . Method for manufacturing nanoparticles comprising a metallic core coated with a layer of polymer material comprising the following steps:
a) preparing a water-in-oil emulsion comprising droplets of an aqueous phase, dispersed in an organic phase, b) adding nanoparticles comprising a metallic core coated with a shell of carbonaceous material, whereby nanoparticles trapped in the droplets are obtained, c) adding precursor monomers of the polymer material, and d) adding a polymerisation initiator, adding the precursor monomers of the polymer material and the polymerisation initiator resulting in polymerisation of the monomers, whereby nanoparticles coated with a layer of polymer material, dispersed in the organic phase, are obtained.

2 . Method according to claim 1 , wherein the carbonaceous material is organised 2D carbon.

3 . Method according to claim 2 , wherein the carbonaceous material is graphene.

4 . Method according to claim 1 , wherein the core of the nanoparticles is made of cobalt, iron, nickel, copper, silver, gold, or of one of the alloys thereof, or of one of the nitrides thereof.

5 . Method according to claim 1 , wherein the polymer material is chosen among polystyrene, poly(methyl methacrylate), polyurethane, a polyacrylic, polypropylene, a polyimide, polyetherimide and a polymer having a pyrene group.

6 . Method according to claim 1 , wherein the thickness of the layer of polymer material ranges from 1 nm to 100 nm.

7 . Method according to claim 6 , wherein the thickness of the layer of polymer material ranges from 2 nm to 50 nm.

8 . Method according to claim 1 , wherein the diameter of the droplets ranges from 20 nm to 1 μm.

9 . Method according to claim 8 , wherein the diameter of the droplets ranges from 30 nm to 100 nm.

10 . Method according to claim 1 , wherein electrically insulating nanoparticles are added to the emulsion.

11 . Method according to claim 10 , wherein the electrically insulating nanoparticles are made of metal oxide.

12 . Powder of nanoparticles obtained by the method defined in claim 1 , the nanoparticles comprising a metallic core coated successively with a layer of carbonaceous materials and with a layer made of a polymer material, the maximum diameter/minimum diameter ratio of the nanoparticles being less than or equal to 5.

13 . Powder according to claim 12 , wherein the maximum diameter/minimum diameter ratio of the nanoparticles is less than or equal to 2.

14 . Powder according to claim 13 , wherein the maximum diameter/minimum diameter ratio of the nanoparticles is less than or equal to 1.5.

15 . Electronic device comprising nanoparticles, as defined in claim 12 , dispersed in a matrix.

16 . Electronic device according to claim 15 , wherein the matrix is made of a polymer material chosen among polystyrene, polyethylene terephthalate, cellulose acetate, polycarbonate, polypropylene, polyethylene, a polyamide, a polysiloxane, a polysulphone, a polyester, a polyetheretherketone, a polyetherimide and an epoxide.

17 . Electronic device according to claim 15 , wherein the polymer material comprises groups photosensitive to ultraviolet rays.

18 . Electronic device according to claim 15 , wherein the matrix includes electrically insulating nanoparticles.

19 . Electronic device according to claim 15 , the electronic device being an inductor, a filter or a capacitor.

20 . Electronic device according to claim 15 , the electronic device being an inductor, a filter or a capacitor made of thin layers on a silicon substrate.

Assignees

• Commissariat Energie Atomique

Inventors

• Viala Bernard

Classifications

• B22F1/16

  Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title

• B22F1/102

  Metallic powder coated with organic material · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• H01G4/206 Primary

  inorganic and synthetic material · CPC title

• H01G4/10

  Metal-oxide dielectrics {(H01G4/085 takes precedence)} · CPC title