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Method for preparing single-walled carbon nanotube fiber and composite fiber thereof

A single-wall carbon nanotube and composite fiber technology, which is applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve problems such as limiting the preparation and performance of composite fibers, limiting practical applications, and complex preparation processes, and achieves high strength and multi-functionality. The effect of high conductivity and high conductivity

Active Publication Date: 2019-04-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are that the complicated preparation process (need to first fabricate vertical arrays of carbon nanotubes for pullable films), low efficiency, and thus limit the practical application
However, the current wet spinning technology limits the preparation and performance of composite fibers due to the use of polymers and superacids in the preparation process.

Method used

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  • Method for preparing single-walled carbon nanotube fiber and composite fiber thereof
  • Method for preparing single-walled carbon nanotube fiber and composite fiber thereof
  • Method for preparing single-walled carbon nanotube fiber and composite fiber thereof

Examples

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Embodiment 1

[0046] In this embodiment, the method for preparing single-walled carbon nanotube fibers is as follows:

[0047] Preparation of single-walled carbon nanotubes: The preparation temperature is 1200°C, the liquid-phase carbon source, catalyst precursor, and growth promoter are respectively toluene, ferrocene, and thiophene, and the mass ratio of the three is 100:6:1.5. The injection speed is 1.5mL·h -1 , carrier gas H 2 The flow rate is 7000sccm, the gaseous carbon source C 2 h 4 The flow rate is 10 sccm.

[0048] Preparation of spinning stock solution: add single-walled carbon nanotubes and sodium cholate hydrate in water, and ultrasonically disperse in an ultrasonic cell pulverizer for 30 minutes (power 300W) to obtain a dispersion, wherein: the concentration of single-walled carbon nanotubes is 0.2wt%, The concentration of sodium cholate hydrate was 2 wt.%.

[0049] Fiber spinning process: such as figure 1 As shown, the dispersion liquid is injected from a syringe into t...

Embodiment 2

[0052] In this example, manganese dioxide is taken as an example to demonstrate the preparation of composite fibers and their capacitance properties. The method for preparing single-walled carbon nanotube composite fibers is as follows:

[0053] Preparation of single-walled carbon nanotubes: The preparation temperature is 1200°C, the liquid-phase carbon source, catalyst precursor, and growth promoter are respectively toluene, ferrocene, and thiophene, and the mass ratio of the three is 100:6:1.5. The injection speed is 1.5mL·h -1 , carrier gas H 2 The flow rate is 7000sccm, the gaseous carbon source C 2 h 4 The flow rate is 10 sccm.

[0054] MnO 2 The preparation of sol: (1) add sodium lauryl sulfate (200mg) and H in 500mL deionized water 2 SO 4 (2mL, molar concentration is 1M); (2) Place the above solution in a 90°C water bath and stir for 15min; (3) Add KMnO to the above solution 4 (200mg), continue to stir and react for 1h, the solution gradually changes from purple ...

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Abstract

The invention relates to the field of carbon nanotube fiber and composite fiber thereof, in particular to a method for preparing single-walled carbon nanotube fiber and composite fiber thereof. A single-walled carbon nanotube prepared through a floating catalyst chemical vapor deposition method is adopted as a base material, an amphipathy surface active agent is used for dispersing the single-walled carbon nanotube and extruded into a condensation bath to form the fiber, and continuous preparation of the high-strength and high-conductivity fiber is achieved. A material with the good compatibility is added into a fiber stock solution, the composite fiber is obtained, and more functions are given to the fiber. According to the method, consumption of strong acid in the existing wet method spinning technology is avoided, and safety risk and environment problems in the production process are reduced; meanwhile, consumption of insulativity polymer adhesives is avoided, the conductivity of the fiber prepared through wet method spinning is improved, the problems that in the existing carbon nanotube composite fiber preparation technology, the function material is distributed in the fiber not uniformly, and the carrying amount cannot be increased easily are solved, and uniform distribution of the high-load functional material in the fiber base is achieved.

Description

technical field [0001] The invention relates to the field of preparation of carbon nanotube fibers and composite fibers thereof, in particular to a method for preparing single-wall carbon nanotube fibers and composite fibers thereof. Background technique [0002] Single-walled carbon nanotubes have excellent mechanical and electrical properties, extremely high thermal conductivity, good thermal and chemical stability, high specific surface area and low density. For example, the Young's modulus of single-walled carbon nanotubes is as high as 1TPa, the tensile strength exceeds 100GPa, and the elongation at break reaches 15% to 30%; the resistance of single-walled carbon nanotubes is low (4.2kΩ / μm), and electrons in Which has a very long mean free path; it also has high thermal conductivity (3500W·m -1 ·K -1 ), high current carrying capacity (>109A·cm -2 ). However, to realize the practical application of single-walled carbon nanotubes, it is usually necessary to assembl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12
CPCD01F9/12
Inventor 刘畅李国显侯鹏翔成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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