Composite particles comprising a conductive coating of PEDOT/PSS, methods of making, and articles including the same

Patent metadata

Field	Value
Publication number	US-9490041-B2
Application number	US-201314386629-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 27, 2012
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A composite particle includes a spheroidal core having a polymeric layer disposed thereon. In one embodiment, the polymeric layer includes a cationic surfactant and at least one of a nonionic polymer or an anionic polymer. In another embodiment, the polymeric layer includes a cationic polymer and an anionic polymer. Methods of making the composite particles, composite materials, and articles including them are also disclosed.

First claim

What is claimed is:

1. A composite particle comprising:
a single spheroidal core comprising at least one inorganic oxide, and
a polymeric layer disposed on and confining the spheroidal core, wherein the polymeric layer comprises a conductive cationic polymer and an anionic polymer, and wherein the polymeric layer comprises PEDOT/PSS.

2. A plurality of the composite particles of claim 1 , wherein the plurality of composite particles is free-flowing.

3. A method comprising combining the plurality of the composite particles of claim 2 and a binder material.

4. The method of claim 3 , wherein the composite particles are substantially uniformly dispersed in the binder material.

5. The method of claim 3 , wherein the binder material comprises molten polymer.

6. A composite material comprising a plurality of the composite particles of claim 1 dispersed in a binder material.

7. A pipe comprising a tubular metallic member having a corrosion-resistant layer disposed on an outer surface thereof, the corrosion-resistant layer comprising the composite material of claim 6 .

8. The composite material of claim 6 , wherein the composite material is a pressure-sensitive adhesive.

9. The composite material of claim 6 , wherein the binder material comprises a curable material.

10. A method of making composite particles, the method comprising:
providing a dispersion comprising a continuous aqueous phase and a dispersed phase comprising a conductive cationic polymer and an anionic polymer;
combining the dispersion with a plurality of spheroidal cores comprising at least one inorganic oxide such that respective polymeric layers are disposed on and confine each of at least a portion of the spheroidal cores to form the composite particles, wherein the respective polymeric layers comprise PEDOT/PSS, and wherein each one of the composite particles contains a single spheroidal core; and
separating the composite particles from the continuous aqueous phase.

11. The method of claim 10 , further comprising adding solvent to at least a portion of the dispersed phase.

12. Composite particles prepared according to the method of claim 10 .

Assignees

• 3M Innovative Properties Co

Inventors

• Barrios Carlos A
• Yalcin Baris
• Amos Stephen E

Classifications

• H01B1/127 Primary

  comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes · CPC title

• C01P2004/34

  hollow · CPC title

• H01B1/124

  Intrinsically conductive polymers · CPC title

• Y10T428/2998

  including synthetic resin or polymer · CPC title

• C01P2006/40

  Electric properties · CPC title