Multifunctional alcohol dispersions of carbon nanotubes
AssigneeBrewer Science Inc.
InventorMolly Hladik
Life of this patent
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Abstract
New carbon nanotube (CNT) compositions and methods of using those compositions are provided. Raw carbon nanotubes are mechanically dispersed via milling into multifunctional alcohols and mixtures of multifunctional alcohols and solvents to form pastes or dispersions that are viscous enough to be printed using standard means such as screen printing. These pastes or dispersions are stable in both dilute and concentrated solution. The invention allows films to be formed on substrates (e.g., plastics, glass, metals, ceramics).
Claims24
A dispersion in the form of a film on a substrate, said dispersion comprising carbon nanotubes mixed with a C2-C6 multifunctional alcohol, wherein:
- said carbon nanotubes are selected from the group consisting of pristine carbon nanotubes, carbon nanotubes which have been functionalized with one or more polyaromatic moieties, and combinations thereof;
- said dispersion is free of surfactants;
- and
- said multifunctional alcohol is present in said dispersion in an amount of from about 90% to 99.999% by weight, based upon the total weight of the dispersion taken as 100% by weight.
A method of preparing a carbon nanotube film, said method comprising:
- providing a dispersion comprising carbon nanotubes mixed with a C2-C6 multifunctional alcohol, wherein:
- said dispersion is free of surfactants;
- said C2-C6 multifunctional alcohol is present in said dispersion in an amount of from about 90% to about 99.999% by weight, based upon the total weight of the dispersion taken as 100% by weight;
- and
- said carbon nanotubes are selected from the group consisting of pristine carbon nanotubes, carbon nanotubes which have been functionalized with one or more polyaromatic moieties, and combinations thereof;
- and
- forming said dispersion into a film on a substrate.
A dispersion comprising carbon nanotubes mixed with a C2-C6 multifunctional alcohol, said dispersion:
- being formable into a film having a sheet resistance of less than about 7,000 Ω/sq at 85% T;
- having a carbon nanotube concentration of from about 0.01% to about 5% by weight, based upon the total weight of the dispersion taken as 100% by weight;
- having a multifunctional alcohol concentration of from about 90% to about 99.999% by weight, based upon the total weight of the dispersion taken as 100% by weight;
- and
- being free of surfactants.
Dependencies are inferred from the claim text.