Dispersion of small scale materials via cavitation
AssigneeCens Materials Ltd.
InventorsMichael Bromfman, Einat Schur
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Abstract
There is provided methods and systems for disaggregation and deagglomeration of small scale materials such as carbon nanotubes by cavitation of a treatment substance. The treatment substance may be a substance such as CO2 which is capable of undergoing phase changes. Systems must be capable of withstanding high pressures, and cavitation may be done by ultrasound, mechanical agitation, injection of a jet stream, or other methods. Materials treated via the methods of the invention may be removed without the use of chemical surfactants or other chemical modification means, and may be further used in a battery.
Claims10
A method for dispersion of carbon nanotubes, the method comprising:
- (a) placing a powder of said carbon nanotubes into a treatment chamber;
- (b) introducing a treatment substance comprising carbon dioxide in a non-liquid form into the treatment chamber, said treatment substance being capable of undergoing cavitation;
- and
- (c) cavitating the treatment substance by injection of a jet stream of a supercritical carbon dioxide into a liquid carbon dioxide,
- wherein said cavitating applies mechanical stress to the treatment substance to cause the collapse of microscopic bubbles in the treatment substance, thereby causing the dispersion of said carbon nanotubes.
Dependencies are inferred from the claim text.