Aqueous dispersions and methods of making same
First Claim
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1. An aqueous carbon nanotube dispersion comprising:
- carbon nanotube particles present in an amount of at least about 1 weight percent on a total solids basis, wherein the carbon nanotube particles comprise a plurality of carbon nanotubes and have a mean particle size that ranges from about 250 nm to about 2 μ
m; and
a polymeric carrier, the polymeric carrier comprising an aqueous dispersion of one or more polymeric species;
wherein the aqueous carbon nanotube dispersion has a viscosity of 1100 to 4500 cP at 5 RPM and 25°
C.
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Abstract
The present invention, in one aspect, provides aqueous dispersions of carbon nanotubes. In some embodiments such aqueous dispersions can be applied to fiber glass strands to impart one or more electrically conductive properties to the fiber glass strands.
39 Citations
28 Claims
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1. An aqueous carbon nanotube dispersion comprising:
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carbon nanotube particles present in an amount of at least about 1 weight percent on a total solids basis, wherein the carbon nanotube particles comprise a plurality of carbon nanotubes and have a mean particle size that ranges from about 250 nm to about 2 μ
m; anda polymeric carrier, the polymeric carrier comprising an aqueous dispersion of one or more polymeric species; wherein the aqueous carbon nanotube dispersion has a viscosity of 1100 to 4500 cP at 5 RPM and 25°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making an aqueous carbon nanotube dispersion comprising:
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providing a polymeric carrier; mixing carbon nanotube particles in an amount of at least about 1 weight percent on a total solid basis with the polymeric carrier, wherein the polymeric carrier comprising an aqueous dispersion of one or more polymeric species and wherein the carbon nanotube particles comprise a plurality of carbon nanotubes; and reducing the mixed carbon nanotube particles in size such that the carbon nanotube particles have a mean particle size that ranges from about 250 nm to about 2 μ
m;wherein the aqueous carbon nanotube dispersion has a viscosity of 1100 to 4500 cP at 5 RPM and 25°
C. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An aqueous carbon nanotube dispersion consisting essentially of:
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carbon nanotube particles present in an amount of at least about 1 weight percent on a total solids basis, wherein the carbon nanotube particles comprise a plurality of carbon nanotubes and have a mean particle size that ranges from about 250 nm to about 2 μ
m; anda polymeric carrier selected from the group consisting of a polyvinylpyrrolidone, a polyurethane, an epoxy, and combinations thereof; wherein the aqueous carbon nanotube dispersion has a viscosity of 1100 to 4500 cP at 5 RPM and 25°
C.
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Specification