Carbon nanostructure preblends and their applications
First Claim
1. A preblend composition comprising carbon nanostructures and a particulate solid, said preblend composition prepared by wet-mixing said carbon nanostructures and said particulate solid in a liquid medium, wherein the preblend composition comprises solid core particles of said particulate solid coated with a shell of said carbon nanostructures forming a core-shell material;
- wherein the core particles comprise carbon-based particles selected from the group consisting of graphitic carbon and glassy carbon; and
wherein the core particles are regular or irregular in shape and have a size in the range of 20 nm to 20 μ
m in terms of average longest dimension.
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Abstract
A method for preparing a “preblend” of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene-α-olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.
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21 Claims
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1. A preblend composition comprising carbon nanostructures and a particulate solid, said preblend composition prepared by wet-mixing said carbon nanostructures and said particulate solid in a liquid medium, wherein the preblend composition comprises solid core particles of said particulate solid coated with a shell of said carbon nanostructures forming a core-shell material;
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wherein the core particles comprise carbon-based particles selected from the group consisting of graphitic carbon and glassy carbon; and wherein the core particles are regular or irregular in shape and have a size in the range of 20 nm to 20 μ
m in terms of average longest dimension. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. A preblend composition comprising carbon nanostructures and a particulate solid, said preblend composition prepared by wet-mixing said carbon nanostructures and said particulate solid in a liquid medium, wherein the preblend composition comprises solid core particles of said particulate solid coated with a shell of said carbon nanostructures forming a core-shell material;
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wherein the core particles comprise carbon-based particles selected from the group consisting of graphitic carbon and glassy carbon; and wherein the carbon nanostructures consist of one or more from the group consisting of fullerenes, single-walled carbon nanotubes, multi-walled carbon nanotubes, and their chemical derivatives. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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9. A method comprising:
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dispersing carbon nanostructures in a liquid medium to form a dispersion; blending the dispersion with a particulate solid to form a blend; and drying said blend to form a preblend; wherein the preblend comprises a core-shell material comprising a core of particles of said particulate solid coated with a shell of said carbon nanostructures; wherein the core particles comprise carbon-based particles selected from the group consisting of graphitic carbon and glassy carbon; and wherein the carbon nanostructures consist of one or more from the group consisting of fullerenes, single-walled carbon nanotubes, multi-walled carbon nanotubes, and their chemical derivatives. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification