NANOPARTICLES CONFINED IN POLYELECTROLYTES

• US 20080199700A1
• Filed: 05/07/2008
• Published: 08/21/2008
• Est. Priority Date: 02/13/2007
• Status: Active Grant

• Current Assignee: Vive Crop Protection Inc.
• Original Assignee: Northern Technologies, Inc. (Emerson Electric Company)
• Inventors: Goh, Jane B., Anderson, Darren, Dinglasan, Jose Amado
• Granted Patent: US 7,501,180 B2
• Time in Patent Office: Days
• US Class Current: 428/402
• CPC Class Codes: B01J 2/006 Coating of the granules without description of the process or the device by which the granules are obtained to prevent the granules sticking together B01J2/30
• CPC Class Codes: B22F 1/054 Nanosized particles
• CPC Class Codes: B22F 1/102 Metallic powder coated with organic material
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/0811 with zinc or cadmium
• CPC Class Codes: C09K 11/565 with zinc cadmium
• CPC Class Codes: C09K 11/883 with zinc or cadmium
• CPC Class Codes: Y10S 977/773 Nanoparticle, i.e. structure having three dimensions of 100 nm or less
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

Methods of producing stabilized composite nanoparticles comprising a nanoparticle and a multiple polyelectrolyte stabilizing moiety layer, a method of producing a multilayer stabilized composite nanoparticle, and such nanoparticles.

Claims

1. A nanoparticle composite comprising a nanoparticle with a mean diameter in the range of between about 1 nm to about 100 nm, the nanoparticle formed within a plurality of collapsed polyelectrolyte stabilizing moieties.

2. The composite nanoparticle of claim 0 wherein one or more of the polyelectrolyte stabilizing moieties is cross-linked.

3. The composite nanoparticle of claim 2 wherein the cross-linking is accomplished by one of the following:

electromagnetic radiation induced cross-linking, chemically induced cross-linking or thermally induced cross-linking.

4. The composite nanoparticle of claim 0 wherein the polymeric stabilizing moiety layer is porous to small chemical entities.

5. The composite nanoparticle of claim 4 wherein the small chemical entities have a mean size in the range of about 1 nm to about 5 nm.

6. The composite nanoparticle of claim 0 wherein the polymeric stabilizing moiety layer comprises one of the following:

an ionizable polymer, an ionized polymer, a single polymer molecule, co-polymers thereof, and a combination of polymer compounds.

7. The composite nanoparticle of claim 0 wherein the polymeric stabilizing moiety comprises one of the following:

poly (styrene sulfonate), poly(diallyldimethylammonium chloride), poly(acrylic acid), poly(ethyleneimine) and poly(allylamine hydrochloride).

8. The composite nanoparticle of claim 0 wherein the polymeric stabilizing moiety layer has a net charge.

9. The composite nanoparticle of claim 8 supported by a substrate forming a stabilized nanoparticle layer on the substrate.

10. The composite nanoparticle of claim 9 wherein the substrate surface has a net charge.

11. The composite nanoparticle of claim 9 wherein a second nanoparticle composite with an opposite charge polarity of the first nanoparticle composite is adsorbed to the stabilized nanoparticle layer.

12. The nanoparticle composite of claim 9 wherein the nanoparticle and substrate are sintered.