Method for making carbon nanotube composite film
First Claim
1. A method for making carbon nanotube composite film, comprising:
- providing an original carbon nanotube film comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force and substantially extending along a first direction, and the plurality of carbon nanotubes in the original carbon nanotube film define a plurality of micropores;
forming a patterned carbon nanotube film by patterning the original carbon nanotube film to define a plurality of through holes arranged into a plurality of rows of through holes in the original carbon nanotube film along the first direction, each row of through holes comprising at least two spaced through holes, a space between two adjacent through holes is greater than a size of one of the plurality of micropores in the original carbon nanotube film;
the patterned carbon nanotube film comprises a plurality of connecting parts and a plurality of extending parts both extending along the first direction, the plurality of connecting parts is separated from each other by the plurality of though holes along the first direction, and the plurality of extending parts is separated from each other by the plurality of connecting parts along a second direction crossed with the first direction;
the plurality of extending parts comprises a first portion of the plurality of carbon nanotubes; and
the plurality of connecting parts comprises a second portion of the plurality of carbon nanotubes; and
treating the patterned carbon nanotube film with a polymer solution comprising an organic solvent and a polymer material dissolved in the organic solvent such that the plurality of extending parts is shrunk into a plurality of carbon nanotube linear units;
a pulling force is produced in a process shrinking of the plurality of extending parts, and an interfacial tension is produced between the plurality of connecting parts and the organic solvent; and
extending directions of the second portion of the plurality of carbon nanotubes are shifted into directions intersecting so as to cross the first direction, by the pulling force and the interfacial tension, to form a plurality of carbon nanotube groups; and
the plurality of carbon nanotube groups comprises the second portion of the plurality of carbon nanotubes intercrossed with each other.
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Accused Products
Abstract
A method for making carbon nanotube composite film is provided. An original carbon nanotube film includes carbon nanotubes joined end to end by van der Waals attractive force. The carbon nanotubes substantially extend along a first direction. A patterned carbon nanotube film is formed by patterning the original carbon nanotube film to define at least one row of through holes arranged in the original carbon nanotube film along the first direction. Each row of through holes includes at least two spaced through holes. The patterned carbon nanotube film is treated with a polymer solution. The patterned carbon nanotube film is shrunk into the carbon nanotube composite film.
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Citations
20 Claims
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1. A method for making carbon nanotube composite film, comprising:
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providing an original carbon nanotube film comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force and substantially extending along a first direction, and the plurality of carbon nanotubes in the original carbon nanotube film define a plurality of micropores; forming a patterned carbon nanotube film by patterning the original carbon nanotube film to define a plurality of through holes arranged into a plurality of rows of through holes in the original carbon nanotube film along the first direction, each row of through holes comprising at least two spaced through holes, a space between two adjacent through holes is greater than a size of one of the plurality of micropores in the original carbon nanotube film;
the patterned carbon nanotube film comprises a plurality of connecting parts and a plurality of extending parts both extending along the first direction, the plurality of connecting parts is separated from each other by the plurality of though holes along the first direction, and the plurality of extending parts is separated from each other by the plurality of connecting parts along a second direction crossed with the first direction;
the plurality of extending parts comprises a first portion of the plurality of carbon nanotubes; and
the plurality of connecting parts comprises a second portion of the plurality of carbon nanotubes; andtreating the patterned carbon nanotube film with a polymer solution comprising an organic solvent and a polymer material dissolved in the organic solvent such that the plurality of extending parts is shrunk into a plurality of carbon nanotube linear units;
a pulling force is produced in a process shrinking of the plurality of extending parts, and an interfacial tension is produced between the plurality of connecting parts and the organic solvent; and
extending directions of the second portion of the plurality of carbon nanotubes are shifted into directions intersecting so as to cross the first direction, by the pulling force and the interfacial tension, to form a plurality of carbon nanotube groups; and
the plurality of carbon nanotube groups comprises the second portion of the plurality of carbon nanotubes intercrossed with each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification