High-performance carbon nanotube/carbon composite fiber and rapid preparation method thereof

A carbon nanotube composite, carbon nanotube fiber technology, applied in the direction of carbon fiber, fiber processing, textiles and papermaking, can solve the problems of time-consuming, energy consumption, electrical performance degradation, etc., to reduce the cross-sectional area, overcome agglomeration, improve The effect of inter-tube forces

Active Publication Date: 2020-05-05
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the insulating properties of the polymer itself, the electrical properties of carbon nanotube fibers are reduced after they are introduced into the polymer.
Moreover, heating in a high-temperature environment generally takes more than 2 hours, which consumes energy and time.

Method used

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  • High-performance carbon nanotube/carbon composite fiber and rapid preparation method thereof
  • High-performance carbon nanotube/carbon composite fiber and rapid preparation method thereof
  • High-performance carbon nanotube/carbon composite fiber and rapid preparation method thereof

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preparation example Construction

[0038] An aspect of the embodiments of the present invention provides a rapid preparation method of high-performance carbon nanotubes / carbon composite fibers, which includes:

[0039] During the carbon nanotube fiber spinning process and / or after the spinning is completed, fully infiltrate and twist the carbon nanotube fiber with a high carbon content polymer precursor solution, and then remove the solvent on the surface of the carbon nanotube fiber;

[0040] And, apply drawing force to the obtained carbon nanotube composite fiber, pass electric current into the described carbon nanotube composite fiber at the same time, make the precursor of the high carbon residue rate polymer in the described carbon nanotube composite fiber intersect Combined curing, followed by carbonization of the formed polymer, to prepare high-performance carbon nanotube / carbon composite fibers.

[0041] In some typical implementation cases, the preparation method specifically includes:

[0042] (1) In...

Embodiment 1

[0087]The carbon nanotube fibers were prepared by floating chemical vapor deposition method. The specific process was as follows: using ethanol as the carbon source, ferrocene as the catalyst, and thiophene as the growth aid. The formed mixed solution is injected into the reaction area, and the generated continuous carbon nanotube airgel is shrunk through a sealed water tank to obtain flat carbon nanotube filaments. During the preparation process, a certain amount of high-purity hydrogen will be introduced, with a flow rate of 60-80 sccm. The injection speed of the mixed solution was controlled at 6-8 μL / min. Alumina corundum tubes are used in the reaction zone, the growth temperature of carbon nanotubes in the furnace is set at 1300°C, and the length of the high-temperature reaction zone is >40cm. In order to protect the whole reaction, the carrier gas is high-purity argon (99.99%), and the flow rate is 80-120 sccm.

[0088] Such as figure 1 As shown, after the carbon nano...

Embodiment 2

[0092] Growth of carbon nanotube airgel by floating CVD method, that is, under the flow of argon and hydrogen, the mixture of ethanol, ferrocene and thiophene is injected into a high-temperature tube furnace at 1300 °C at a rate of 6-8 μL / min , the carrier gas flow rate is 80-120sccm, and the continuous carbon nanotube aerogel is formed at the other end of the high-temperature tube furnace, and the generated continuous carbon nanotube aerogel is shrunk through a sealed water tank to obtain a carbon nanotube flat filament.

[0093] After the carbon nanotube flat filament comes out of the furnace, let it pass through the PAN / DMF solution with a mass fraction of 3wt%, then draw and twist the carbon nanotube flat filament after infiltration to obtain CNT / PAN composite fiber, and then CNT / PAN The composite fibers were passed through a heating furnace set at 50°C to remove the solvent from the fibers. Let the dried CNT / PAN composite fiber pass through the quartz tube that allows the...

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Abstract

The invention discloses a high-performance carbon nanotube / carbon composite fiber and a rapid preparation method thereof. The preparation method comprises the following steps of during the carbon nanotube fiber spinning process and / or after the spinning is completed, fully infiltrating a precursor solution of a polymer with a high residual carbon rate and twisting the carbon nanotube fiber, and then removing a solvent on the surface of the carbon nanotube fiber; and applying a drafting force to the obtained carbon nanotube composite fiber, introducing current into the carbon nanotube compositefiber, so that a precursor of the polymer with the high residual carbon rate in the carbon nanotube composite fiber is crosslinked and cured, and then the formed polymer is carbonized to obtain the high-performance carbon nanotube / carbon composite fiber. The preparation method of the invention is fast and efficient, and the carbon nanotube / carbon composite fiber with high orientation and a compact structure can be prepared in only 10 seconds, which not only can greatly improve the mechanical property and the electrical property of the carbon nanotube fiber, but also enable the carbon nanotubefiber to have excellent resistance to extreme environment.

Description

technical field [0001] The invention relates to a method for preparing high-performance carbon nanotube / carbon (CNT / C) composite fibers, in particular to a method for rapidly preparing high-performance carbon nanotube / carbon composite fibers by current-induced carbonization combined with drawing force, belonging to Technical field of carbon fiber preparation. Background technique [0002] Since the discovery of carbon nanotubes, CNTs have aroused widespread interest from experts in different fields worldwide because of their unique structures and excellent properties. Theoretical studies have shown that carbon nanotubes have a tensile strength of up to 200GPa and an elastic modulus of 1TPa, as well as excellent electrical and thermal properties. Carbon nanotube fiber is the most important macroscopic form of a large number of carbon nanotubes. It has broad application prospects in aerospace, bulletproof equipment, electromagnetic shielding materials, energy storage, lightwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M101/40
CPCD06M11/74D06M2101/40
Inventor 邸江涛宋彦辉张超金赫华李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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