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Method for improving orientation degree and conductivity of carbon nanotube fiber

A technology of carbon nanotube fiber and degree of orientation, which is applied in the direction of carbon fiber, fiber treatment, fiber chemical characteristics, etc., can solve the problems of fiber brittleness and no improvement of fiber orientation degree, and achieve the improvement of orientation degree and density, light weight and hardness big effect

Inactive Publication Date: 2020-05-15
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent impregnation method mainly uses organic solvents such as acetone to infiltrate the carbon nanotube fibers, and the fibers can be shrunk after the solvent evaporates; the mechanical compression method compresses the fibers by applying an external force, thereby making the structure more compact, but the fibers are brittle
The above two methods still did not improve the degree of fiber orientation

Method used

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  • Method for improving orientation degree and conductivity of carbon nanotube fiber
  • Method for improving orientation degree and conductivity of carbon nanotube fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Continuous primary carbon nanotube fibers were prepared by floating catalytic chemical vapor deposition. In the tube furnace, hydrogen and argon are used as the carrier gas, ethanol is used as the carbon source, ferrocene and thiophene are dissolved in ethanol as catalysts, and continuously injected into the vertical high-temperature tube furnace to form carbon nanotube airgel, and Draw out under the furnace to shrink through a water tank, then further shrink through acetone, heat and dry to obtain carbon nanotube strips. Wherein the gap size between carbon nanotubes is 10-100nm, the content of ferrocene is 1.2wt%, the content of thiophene is 0.6wt%, and the injection rate of ethanol is controlled at 5mL h -1 , hydrogen flow at 300mL·min -1 , argon gas flow at 500mL·min -1 , the temperature of the tube furnace is 1200°C.

[0042] The primary carbon nanotube fibers were immersed in a 5wt% chlorosulfonic acid solution for a swelling time of 100 s, and then properly stre...

Embodiment 2

[0047] Continuous primary carbon nanotube fibers were prepared by floating catalytic chemical vapor deposition. In the tube furnace, hydrogen and argon are used as the carrier gas, ethanol is used as the carbon source, ferrocene and thiophene are dissolved in ethanol as catalysts, and continuously injected into the vertical high-temperature tube furnace to form carbon nanotube airgel, and Draw out under the furnace to shrink through a water tank, then further shrink through acetone, heat and dry to obtain carbon nanotube strips. Wherein the gap size between carbon nanotubes is 10-100nm, the content of ferrocene is 1.2wt%, the content of thiophene is 0.6wt%, and the injection rate of ethanol is controlled at 5mL h -1 , hydrogen flow at 300mL·min -1 , argon gas flow at 500mL·min -1 , the temperature of the tube furnace is 1200°C.

[0048] The primary carbon nanotube fibers were immersed in 15wt% chlorosulfonic acid solution, the swelling time was 10s, and then properly stretc...

Embodiment 3

[0053] Continuous primary carbon nanotube fibers were prepared by floating catalytic chemical vapor deposition. In the tube furnace, hydrogen and argon are used as the carrier gas, ethanol is used as the carbon source, ferrocene and thiophene are dissolved in ethanol as catalysts, and continuously injected into the vertical high-temperature tube furnace to form carbon nanotube airgel, and Draw out under the furnace to shrink through a water tank, then further shrink through acetone, heat and dry to obtain carbon nanotube strips. Wherein the gap size between carbon nanotubes is 10-100nm, the content of ferrocene is 1.2wt%, the content of thiophene is 0.6wt%, and the injection rate of ethanol is controlled at 5mL h -1 , hydrogen flow at 300mL·min -1 , argon gas flow at 500mL·min -1 , the temperature of the tube furnace is 1200°C.

[0054] The primary carbon nanotube fibers were immersed in a 10wt% chlorosulfonic acid solution, the expansion time was 20s, and then properly str...

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Abstract

The invention discloses a method for improving the orientation degree and conductivity of a carbon nanotube fiber. The method comprises the steps of preparing a continuous carbon nanotube fiber by a floating catalytic chemical vapor deposition method; then, immersing the carbon nanotube fiber into a solvent to fully expand; performing proper stretching, so that the carbon nanotube fiber is rearranged to improve the axial orientation; next, immersing the carbon nanotube fiber into a coagulating bath; driving phase separation through solubility differences; extruding the solvent from the carbonnanotube fiber; then, performing online washing and drying to form a compact carbon nanotube fiber; and finally, twisting the carbon nanotube fiber to form a multistage spiral structure. The method has the advantages that the primary carbon nanotube fiber prepared by a direct spinning method is swelled and shrunk, and the orientation degree and compactness of the fiber are well improved, so that the electrical conductivity and the mechanical strength of the fiber are greatly improved; the preparation process is simple; the preparation conditions are mild; the cost is low; the production efficiency is high; and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of novel functional fiber materials, and in particular relates to a method for improving the orientation degree and conductivity of carbon nanotube fibers. Background technique [0002] As a new type of conductive material, carbon nanotubes have attracted extensive attention from researchers at home and abroad since their successful preparation. It is one of the core materials for building future super-strong materials and carbon-based devices. Assembling carbon nanotubes into fibers and films is one of the important ways to realize their macroscopic applications. Among them, carbon nanotube fiber is a one-dimensional continuous assembly of carbon nanotubes, which has good flexibility, electrical conductivity and mechanical strength. It can be used alone or woven, and has become the most concerned carbon nanotube macroscopic body. [0003] In the past two decades, people have devoted themselves to developin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/16D06B3/02D06B15/00D06M13/265D01F9/127
CPCD01F9/1277D02G3/16D06B3/02D06B15/00D06M13/265D06M2101/40D10B2101/122
Inventor 马千里周绪波宋西全关振虹侯春蕾
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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