AGGREGATED THREAD STRUCTURE, PRODUCTION METHOD THEREOF, AND ELECTRIC WIRE USING THE SAME
First Claim
1. An aggregated thread structure containing carbon nanotube, wherein:
- the bulk density is 0.5 g/cm3 or more;
the weight reduction rate, which is obtained by subtracting heated weight from dry weight, and dividing the result by the dry weight, wherein the dry weight is the weight measured after heating under air from room temperature to 100°
C. at a temperature increase rate of 10°
C./min and letting stand at 100°
C. for 10 minutes, and the heated weight is the weight measured after further heating under air to 450°
C. at a temperature increase rate of 10°
C./min, is 50% or less;
the G/D ratio, in which G is the maximum peak intensity in the range of 1550 to 1650 cm−
1 and D is the maximum peak intensity in the range of 1300 to 1400 cm−
1 for the spectrum obtained by resonance Raman scattering measurement, is 10 or more; and
the electric conductivity is 50 S/cm or more.
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Accused Products
Abstract
A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cm3 or more; a weight reduction rate up to 450° C. of 50% or less; a G/D ratio for resonance Raman scattering measurement of 10 or more; and an electric conductivity of 50 S/cm or more.
16 Citations
18 Claims
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1. An aggregated thread structure containing carbon nanotube, wherein:
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the bulk density is 0.5 g/cm3 or more; the weight reduction rate, which is obtained by subtracting heated weight from dry weight, and dividing the result by the dry weight, wherein the dry weight is the weight measured after heating under air from room temperature to 100°
C. at a temperature increase rate of 10°
C./min and letting stand at 100°
C. for 10 minutes, and the heated weight is the weight measured after further heating under air to 450°
C. at a temperature increase rate of 10°
C./min, is 50% or less;the G/D ratio, in which G is the maximum peak intensity in the range of 1550 to 1650 cm−
1 and D is the maximum peak intensity in the range of 1300 to 1400 cm−
1 for the spectrum obtained by resonance Raman scattering measurement, is 10 or more; andthe electric conductivity is 50 S/cm or more. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An aggregated thread structure containing Carbon nanotube, wherein:
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the bulk density is 0.5 g/cm3 or more; the G/D ratio, in which G is the maximum peak intensity in the range of 1550 to 1650 cm−
1 and D is the maximum peak intensity in the range of 1300 to 1400 cm−
1 for the spectrum obtained by resonance Raman scattering measurement, is 10 or more; andthe electric conductivity is 500 S/cm or more.
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9. A method for producing an aggregated thread structure, which comprises:
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(a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion; (b) a process of injecting said dispersion of carbon nanotube to a condensing liquid, which is a second solvent differing from the first solvent, to thereby aggregate and spin carbon nanotube;
whereinsaid first solvent is water or a mixed solvent of one or more organic solvent selected from the group consisting of methanol, ethanol, propanol, formamide, ethylene glycol, and dimethyl sulfoxide, and water; said condensing liquid is a solution containing one of N-methylpyrrolidone, N,N-dimethyl acetamide, propylene carbonate, formamide, N-methyl formamide, water, methanol, ethanol, or propanol, and said condensing liquid and said first solvent differ in their affinity to said surfactant; and the pH of said condensing liquid is 3 to 11. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification