Silver nanoparticle-sulfonated polyester composite powders and methods of making the same

Patent metadata

Field	Value
Publication number	US-9909013-B2
Application number	US-201615098270-A
Country	US
Kind code	B2
Filing date	Apr 13, 2016
Priority date	Apr 13, 2016
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A composite powder includes a sulfonated polyester matrix and a plurality of silver nanoparticles dispersed within the matrix and methods of making thereof. Various articles can be manufactured from such composite powders.

First claim

What is claimed is:

1. A composite powder for use in selective laser sintering, comprising:
a sulfonated polyester matrix; and
a plurality of silver nanoparticles dispersed within the matrix,
wherein the silver nanoparticle is present in the composite powder in a range from about 0.5 ppm to about 50,000 ppm;
and further wherein the composite powder has a particle size of from about 10 microns to about 300 microns.

2. The composite powder of claim 1 , wherein the sulfonated polyester has a glass transition (Tg) temperature of from about 45° C. to about 65° C.

3. The composite powder of claim 1 , wherein the sulfonated polyester matrix comprises a branched polymer.

4. The composite powder of claim 1 , wherein the sulfonated polyester matrix comprises a linear polymer.

5. The composite powder of claim 1 , wherein the powder composite has a spherical structure.

6. The composite powder of claim 1 , wherein the sulfonated polyester matrix comprises lithium, potassium, or sodium salt of a polymer selected from the group consisting of poly(1,2-propylene-5-sulfoisophthalate), poly(neopentylene-5-sulfoisophthalate), poly(diethylene-5-sulfoisophthalate), copoly-(1,2-propylene-5-sulfoisophthalate)-copoly-(1,2-propylene-terphthalate), copoly-(1,2-propylenediethylene-5-sulfoisophthalate)-copoly-(1,2-propylene-diethylene-terephthalatephthalate), copoly(ethylene-neopentylene-5-sulfoisophthalate)-copoly-(ethylene-neopentylene-terephthalatephthalate), and copoly(propoxylated bisphenol A)-copoly-(propoxylated bisphenol A-5-sulfoisophthalate).

7. The composite of claim 1 , wherein the sulfonated polyester matrix comprises a polyol monomer unit selected from the group consisting of trimethylolpropane, 1,2-propanediol, diethylene glycol, and combinations thereof.

8. The composite of claim 1 , wherein the sulfonated polyester matrix comprises a diacid monomer unit selected from the group consisting of terephthalic acid, sulfonated isophthalic acid, and combinations thereof.

9. A three-dimensional article comprising:
a composite powder comprising:
a sulfonated polyester matrix; and
a plurality of silver nanoparticles dispersed within the matrix;

wherein the silver nanoparticle is present in the composite powder in a range from about 0.5 ppm to about 50,000 ppm;
and further wherein the composite powder has a particle size of from about 10 microns to about 300 microns.

10. The three-dimensional article of claim 9 , wherein the article is selected from the group consisting of a biochemical sensor, an optical detector, an antibacterial, a textile, a cosmetic, an electronic component, a fiber, and a cryogenic superconducting material.

Assignees

• Xerox Corp

Inventors

• Farrugia Valerie M
• Keoshkerian Barkev
• Chretien Michelle N

Classifications

• C08K3/08

  Metals · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C09D167/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09D167/06 takes precedence) · CPC title

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title

• B29C67/0077

  Operations & Transport · mapped topic