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US 9,863,065 B2Granted
Polymer coated sulfonated polyester—silver nanoparticle composite filaments and methods of making the same
AssigneeXerox Corporation
InventorsValerie M. Farrugia, Barkev Keoshkerian, Michelle N. Chrétien
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Abstract
A composite filament includes a core particle comprising a sulfonated polyester matrix and a plurality of silver nanoparticles dispersed within the matrix, and a shell polymer disposed about the core particle, and methods of making thereof. Various articles can be manufactured from such composite filaments.
Claims20
A composite filament comprising:
- a core particle comprising:
- a sulfonated polyester matrix;
- and
- a plurality of silver nanoparticles dispersed within the matrix;
- and
- a shell polymer disposed about the core particle;
- wherein the silver nanoparticle is present in the composite filament in a range from about 0.5 ppm to about 50,000 ppm;
- and further wherein the composite filament has a diameter of from about 0.5 mm to about 5 mm.
5 more elements
A method of producing a composite filament, comprising:
- heating a sulfonated polyester resin in an organic-free solvent;
- adding a solution of silver (I) ion to the heated resin in the organic-free solvent to form a mixture;
- adding a solution of a reducing agent to the mixture, thereby forming an emulsion of core particles comprising a sulfonated polyester matrix and a plurality of silver nanoparticles disposed within the sulfonated polyester matrix;
- adding a styrene monomer and initiator to the emulsion of core particles to form a shell polymer disposed about the core particles, thereby forming a composite structure;
- aggregating the emulsion of composite particles to form aggregated particles;
- coalescing the aggregated particles to form coalesced particles;
- washing the coalesced particles, thereby forming a composite powder;
- and
- extruding the composite powder to produce the composite filament.
6 more elements
An article comprising:
- a composite filament comprising:
- a core particle comprising:
- a sulfonated polyester matrix;
- and
- a plurality of silver nanoparticles dispersed within the matrix;
- and
- a shell polymer disposed about the core particle;
- wherein the silver nanoparticle is present in the composite filament 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.
6 more elements
Dependencies are inferred from the claim text.