Silica-graphenic carbon composite particles and elastomeric materials including such particles
AssigneeQemetica S.A.
InventorsLucas Dos Santos Freire, Qi Ding, Cynthia Kutchko, Shuyang Pan, Nathan J. Silvernail
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Abstract
Composite particles may be produced by drying slurries containing silica particles and graphenic carbon particles in a liquid carrier. Elastomeric formulations comprising a base elastomer composition and the silica-graphenic carbon composite particles are also disclosed. The formulations possess favorable properties such as increased stiffness and are useful for many applications such as tire treads.
Claims19
Silica-graphenic carbon composite particles comprising from 60 to 99.9 weight percent silica and from 0.1 to 40 weight percent graphenic carbon, wherein the graphenic carbon is distributed throughout each composite particle, and the silica comprises multiple silica particles contacting each other in a continuous or interconnected network in which the graphenic carbon is distributed, and wherein the composite particles have an average particle size of from 2 to 100 microns.
A method of making silica-graphenic carbon composite particles, the method comprising drying a slurry comprising silica particles, graphenic carbon particles and a liquid carrier to thereby produce the silica-graphenic carbon composite particles, wherein the composite particles comprise from 60 to 99.9 weight percent silica and from 0.1 to 40 weight percent graphenic carbon, wherein the graphenic carbon is dispersed throughout each silica-graphenic carbon composite particle, and the silica comprises a continuous or interconnected network in which the graphenic carbon is dispersed, and wherein the composite particles have an average particle size of from 2 to 100 microns.
An elastomeric formulation comprising:
- a base elastomer composition;
- and
- from 5 to 70 weight percent silica-graphenic carbon composite particles comprising from 60 to 99.9 weight percent silica and from 0.1 to 40 weight percent graphenic carbon, wherein the graphenic carbon is distributed throughout each silica-graphenic carbon composite particle, and the silica comprises a continuous or interconnected network in which the graphenic carbon is distributed, and wherein the composite particles have an average particle size of from 2 to 100 microns.
A method of making an elastomeric formulation comprising:
- mixing silica-graphenic carbon composite particles with a base elastomer composition to form a mixture;
- and
- curing the mixture, wherein the composite particles comprise from 60 to 99.9 weight percent silica and from 0.1 to 40 weight percent graphenic carbon, wherein the graphenic carbon is distributed throughout each silica-graphenic carbon composite particle, and the silica comprises a continuous or interconnected network in which the graphenic carbon is distributed, and wherein the composite particles have an average particle size of from 2 to 100 microns.
Dependencies are inferred from the claim text.