Method for separating carbon nanotubes using modified cellulose
AssigneeYazaki Corporation
InventorsAyrat Maratovich Dimiev, Timur Lenarovich Khamidullin
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Abstract
The present invention relates to using modified cellulose (e.g., nitrated cellulose) for separating carbon nanotubes (CNTs). A raw mixture of CNTs of different structures or chiral angles (chiralities), can be separated into fractions, based on their selective permeation through a separation column filled with nitrated cellulose. The present invention is particularly useful in separating semiconducting CNTs and metallic CNTs.
Claims20
A method for separating metallic CNTs (M-CNTs) from semiconducting CNTs (S-CNTs) in a mixture of carbon nanotubes (CNTs), comprising the steps of:
- dispersing the mixture of CNTs in a solution to form a CNT dispersion,
- passing the CNT dispersion through a column packed with nitrated cellulose,
- eluting S-CNTs with a first aqueous solution comprising a first surfactant, and
- eluting M-CNTs with a second aqueous solution comprising a second surfactant,
- wherein the first aqueous solution and the second aqueous solution are different.
A method for separating metallic CNTs (M-CNTs) from semiconducting CNTs (S-CNTs) in a mixture of carbon nanotubes (CNTs), comprising the steps of:
- dispersing the mixture of CNTs in a solution to form a CNT dispersion,
- passing the CNT dispersion through a column packed with nitrated cellulose,
- eluting M-CNTs with a first aqueous solution comprising a first surfactant, and
- eluting S-CNTs with a second aqueous solution comprising a second surfactant,
- wherein the first aqueous solution and the second aqueous solution are different.
Dependencies are inferred from the claim text.