Method for large-scale production of continuous carbon nano tube fiber

A carbon nanotube fiber and reaction solution technology, which can be used in the chemical characteristics of fibers, textiles and paper making, etc., and can solve problems such as low utilization rate

Active Publication Date: 2014-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing CVD method for preparing carbon tube fibers mostly adopts a single reaction furnace, and the gas flow is discharged into the atmosphere after being used once, and the utilization rate is low

Method used

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  • Method for large-scale production of continuous carbon nano tube fiber
  • Method for large-scale production of continuous carbon nano tube fiber
  • Method for large-scale production of continuous carbon nano tube fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Into a solution containing 0.6g ferrocene, 25g ethanol, and 0.4g thiophene, introduce 1g water to form a mixed solution, and inject the mixed solution at a rate of 8ml / h to 1000ml / min H 2 In the first furnace of air flow, the temperature of the reactor is set to 1200°C, and the reaction can continuously obtain cylindrical carbon nanotube aggregates; turn on the flowmeter switch in the tail gas conduction device, and the mixture containing 0.7g ferrocene, 21g ethanol, The mixed solution of 0.3g thiophene and 2g water is injected into the back furnace through a micro-injection pump at 8ml / min. Continuous cylindrical carbon nanotube aggregates are formed in the reactor, which are mechanically drawn, passed through water and dense, and wrapped around the external spinning shaft. Double furnace simultaneous spinning to obtain carbon nanotube fibers, such as figure 2 shown. The fibers are composed of a large number of oriented carbon tube bundles, containing a small amount ...

Embodiment 2

[0028] Continuous carbon nanotube fibers were prepared according to the same process and conditions as in Example 1, the liquid injection speed of the rear furnace was adjusted to 6ml / h, and continuous carbon nanotube fibers were obtained by continuous spinning in two furnaces at the same time.

Embodiment 3

[0030] Continuous carbon nanotube fibers were prepared according to the same process and conditions as in Example 1, the liquid injection speed of the rear furnace was adjusted to 12ml / h, and the continuous carbon nanotube fibers were obtained simultaneously in both furnaces.

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Abstract

The invention relates to a method for large-scale production of continuous carbon nano tube fiber. The carbon nano tube fiber is continuously prepared by connecting multiple furnaces in series, utilizing airflow in multiple times, and simultaneously stabilizing multiple furnaces. The mixed reaction solution of an ethyl alcohol carbon source, a ferrocene catalyst, a thiophene accelerant and a water assistant is injected by utilizing a micro-injection pump, and guided to a first hydrogen flow furnace via a nozzle, a cylindrical continuous carbon nano tube aggregate is generated at a reaction zone, and the continuous carbon nano tube fiber is obtained via mechanical traction, waterlogged densification and twining by an external spindle; the airflow is guided to a rear furnace once more via a transmission device, the same reaction solution is injected, the hydrogen flow rate and the solution injection speed of the rear furnace are regulated, the cylindrical continuous carbon nano tube aggregate is generated in the rear furnace, and the continuous carbon nano tube fiber is obtained via mechanical traction, waterlogged densification and twining by an external spindle. According to the invention, the multiple furnaces can at least simultaneously stabilize spinning to reach the hectometer level, and the obtained fiber is mainly composed of double-walled carbon nano tubes; the fiber has better degree of crystallinity, certain strength and electrical conductivity, and is similar to fiber prepared through a typical single reactor.

Description

technical field [0001] The invention relates to a method for large-scale preparation of continuous carbon nanotube fibers, which belongs to the technical field of nanomaterial preparation. Background technique [0002] Carbon nanotube fiber is a macroscopic material formed by the arrangement of countless carbon nanotubes along its axial direction. It is lightweight, high-strength and multifunctional. It has important application prospects in aerospace, national defense, energy and other fields. The large-scale preparation of carbon nanotube fibers is the key to realize its application. The development of methods for large-scale preparation of carbon nanotube fibers is an important research direction in the field of carbon nanotube fiber research. The CVD gas-phase flow spinning method is the most potential method for large-scale preparation of carbon nanotube fibers. This method can prepare kilometer-level high-strength carbon nanotube fibers in one step (patent CN101187094...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12
Inventor 李亚利李东韩帅帅闫啸
Owner TIANJIN UNIV
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