A kind of high-performance carbon nanotube/carbon composite fiber and its rapid preparation method

A carbon nanotube composite and carbon nanotube fiber technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of time-consuming, energy consumption, and electrical performance degradation, so as to reduce the cross-sectional area, overcome agglomeration, improve The effect of the force between the tubes

Active Publication Date: 2022-07-26
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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  • A kind of high-performance carbon nanotube/carbon composite fiber and its rapid preparation method
  • A kind of high-performance carbon nanotube/carbon composite fiber and its rapid preparation method
  • A kind of high-performance carbon nanotube/carbon composite fiber and its rapid preparation method

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preparation example Construction

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

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

[0040] And, applying a drawing force to the obtained carbon nanotube composite fiber, and simultaneously passing an electric current into the carbon nanotube composite fiber, so that the precursor of the polymer with high carbon residue rate in the carbon nanotube composite fiber is crossed. Co-curing, followed by carbonization of the formed polymer, produces high-performance carbon nanotube / carbon composite fibers.

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

[0042] (1) In an air atmosphere, a dr...

Embodiment 1

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

Embodiment 2

[0092] Growth of carbon nanotube aerogels by floating CVD method, that is, under the carrier flow of argon and hydrogen, a 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 continuous carbon nanotube aerogel is formed at the other end of the high-temperature tube furnace.

[0093] After the carbon nanotube flat filament comes out of the furnace, it is passed through the PAN / DMF solution with a mass fraction of 3 wt%, and then the infiltrated carbon nanotube flat filament is drawn and twisted at the same time to obtain CNT / PAN composite fiber, and then CNT / PAN The composite fibers were passed through a heating furnace to remove the solvent from the fibers, and the temperature was set at 50°C. Let the dried CNT / PAN composite fiber pass through a quartz tube that allows the gas to circulate freely. After the fiber passes through the quartz tube, it is conne...

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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 includes: fully infiltrating and twisting the carbon nanotube fibers with a precursor solution of a polymer with a high carbon residue rate during and / or after the spinning of the carbon nanotube fibers, and then removing the surface of the carbon nanotube fibers. a solvent; and, applying a drawing force to the obtained carbon nanotube composite fiber, while passing an electric current into the carbon nanotube composite fiber, so as to make the precursor of the polymer with high carbon residue rate in the carbon nanotube composite fiber The body is cross-linked and solidified, and then the formed polymer is carbonized to prepare high-performance carbon nanotube / carbon composite fibers. The preparation method of the invention is fast and efficient, and the carbon nanotube / carbon composite fiber with high orientation and high density can be prepared in only 10 seconds, which can not only greatly improve the mechanical properties and electrical properties of the carbon nanotube fiber, but also make it have Excellent resistance to extreme environments.

Description

technical field [0001] The invention relates to a preparation method of high-performance carbon nanotube / carbon (CNT / C) composite fiber, in particular to a method for rapidly preparing high-performance carbon nanotube / carbon composite fiber by current-induced carbonization combined with drafting force, belonging to The technical field of carbon fiber preparation. Background technique [0002] Since the discovery of carbon nanotubes, CNTs have attracted widespread interest from experts in different fields around the world due to their unique structure and excellent properties. Theoretical studies have shown that carbon nanotubes possess a tensile strength of up to 200 GPa and an elastic modulus of 1 TPa, as well as excellent electrical and thermal properties. Carbon nanotube fibers are one of the most important macroscopic forms of carbon nanotubes, and they have broad application prospects in aerospace, bulletproof equipment, electromagnetic shielding materials, energy stor...

Claims

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Application Information

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Patent Type & Authority Patents(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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