Process for preparing a carbon nanotube sheet comprising a uniaxially aligned yarn and carbon nanotube sheet prepared thereby
AssigneeAweXome Ray, Inc.
InventorsSe Hoon Gihm, Keun Soo Jeong, Yeon Su Jung
Life of this patent
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Abstract
The present invention provides a process for preparing a carbon nanotube sheet, which comprises forming carbon nanotubes; aggregating the carbon nanotubes to form a yarn; treating the yarn with a solvent to enhance the aggregation force; winding the solvent-treated yarn to prepare a sheet preform having a structure in which one yarn is continuously wound; and cutting and/or pressing the sheet preform to prepare a carbon nanotube sheet that comprises an arrangement structure in which one or a plurality of yarns are uniaxially aligned, and a carbon nanotube sheet prepared thereby.
Claims18
A process for preparing a carbon nanotube sheet, which comprises:
- forming carbon nanotubes;
- aggregating the carbon nanotubes to form a yarn;
- treating the yarn with a solvent to enhance the aggregation force;
- winding the solvent-treated yarn to prepare a sheet preform having a structure in which one yarn is continuously wound;
- and
- cutting and/or pressing the sheet preform to prepare a carbon nanotube sheet that comprises an arrangement structure in which one yarn when the sheet preform is pressed or a plurality of yarns when the sheet preform is cut are uniaxially aligned,
- wherein the yarn in the sheet preform;
- and the one yarn of the carbon nanotube sheet when the sheet preform is pressed;
- and the plurality of yarns of the carbon nanotube sheet when the sheet preform is cut are connected with the sides thereof aligned side by side, wherein the sides that are contiguous to each other are bound by π-π interactions, and
- wherein when the sheet preform satisfies the following Relationship (1), with D which represents the diameter of the yarn in the sheet preform, T which represents the interval between the yarns in the sheet preform, and C which represents the number of carbon nanotubes per unit area (μm2) of the yarn in the sheet preform, the sheet preform and the carbon nanotube sheet maintain their shapes:
- 10<D*T*C<7*104 (1).
A carbon nanotube sheet, which comprise a plurality of unit yarns comprising carbon nanotubes and extending in a first direction, and has an arrangement structure in which the arrangement of the plurality of unit yarns located side by side is repeated in a second direction in a state in which the sides of one unit yarn of the plurality of unit yarns are contiguous with the sides of its neighboring unit yarns, wherein the neighboring unit yarns are connected with the sides thereof aligned side by side, wherein the sides that are contiguous to each other are bound by π-π interactions, and
- wherein when the carbon nanotube sheet satisfies the following Relationship (1), with D which represents the diameter of the unit yarns, T which represents the distance between sides of the unit yarns, and C which represents the number of carbon nanotubes per unit area (μm2) of the unit yarns, the carbon nanotube sheet maintains its shape:
- 10<D*T*C<7*104 (1).
A process for preparing a carbon nanotube sheet, which comprises:
- forming carbon nanotubes;
- aggregating the carbon nanotubes to form a yarn;
- treating the yarn with a solvent to enhance the aggregation force;
- winding the solvent-treated yarn to prepare a sheet preform having a structure in which one yarn is continuously wound;
- and
- cutting and/or pressing the sheet preform to prepare a carbon nanotube sheet that comprises an arrangement structure in which one or a plurality of yarns are uniaxially aligned,
- wherein the step of preparing a sheet preform comprises winding the yarn using a winding means that is rotating about an axis, and releasing the wound yarn from the winding means to obtain the sheet preform,
- wherein the sheet preform is in the form of a pipe with the sides of the yarn are continuously and contiguously wound in a second direction parallel to the axis and having an internal space,
- wherein the sheet preform is pressed such that the inner sides of the sheet preform opposite to each other with the internal space interposed are superposed to prepare a carbon nanotube sheet;
- and
- wherein the carbon nanotube sheet comprises a plurality of unit yarns extending between the opposite ends thereof in the first direction in the planar shape and has an arrangement structure in which the arrangement of the unit yarns located side by side is repeated in the second direction in a state in which the sides of one unit yarn of the plurality of unit yarns are contiguous with the sides of its neighboring unit yarns.
Dependencies are inferred from the claim text.