Polymer coated sulfonated polyester—silver nanoparticle composite filaments and methods of making the same
First Claim
Patent Images
1. 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.
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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.
42 Citations
20 Claims
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1. A composite filament comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of producing a composite filament, comprising:
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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. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An article comprising:
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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. - View Dependent Claims (20)
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Specification