Carbon nano-based fiber as well as preparation method and application thereof

A carbon nano, carbon nanotube technology, applied in the chemical characteristics of fibers, conductive/antistatic filament manufacturing, textiles and papermaking, etc., can solve the problem of difficulty in preparing pure carbon nanotube fibers, threats to operator safety, Structural damage and other problems, to achieve the effect of less harsh experimental conditions, safe operation and lower production costs

Inactive Publication Date: 2020-06-26
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And although the existing technology can also prepare carbon nanotube fibers, it uses polymers as a coagulation bath, it is difficult to prepare pure carbon nanotube fibers, and the conductivity of the fibers is not high
Furthermore, although researchers have successfully prepared pure carbo

Method used

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  • Carbon nano-based fiber as well as preparation method and application thereof
  • Carbon nano-based fiber as well as preparation method and application thereof
  • Carbon nano-based fiber as well as preparation method and application thereof

Examples

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preparation example Construction

[0027] An aspect of the embodiments of the present invention provides a method for preparing carbon nano-based fibers, which includes:

[0028] Provide a carbon nanotube dispersion comprising carbon nanotubes and a dispersant, wherein the content of carbon nanotubes in the carbon nanotube dispersion is 1.01 to 3 wt %;

[0029] Using the carbon nanotube dispersion as a spinning solution, using wet spinning technology, injecting the spinning solution into a coagulation bath to obtain carbon nano-based fibers, wherein the coagulation bath includes organic solvents and / or organic A mixed solution of solvent and water, the organic solvent includes any one or a combination of two or more of acetone, ethanol, isopropanol, ethylene glycol and 1,2-propanediol, the organic solvent and water in the coagulation bath The volume ratio is 1:0~1:8.

[0030] The present invention can adjust the structure and performance of the carbon nano-based fiber by adjusting the types of coagulation bath...

Embodiment 1

[0044] In this example, the carbon nanotube powder with a length of 1 μm can be dispersed in deionized water through a dispersant such as sodium cholate. The mass ratio of sodium cholate to carbon nanotubes is 1:1. After massaging for 15 minutes, the pressure was 50 MPa to obtain a carbon nanotube dispersion, and the carbon nanotube content in the obtained carbon nanotube dispersion was 1.01 wt%.

[0045] The prepared carbon nanotube dispersion was passed through a 50 μm spinneret hole and extruded into an isopropanol coagulation bath at 8 μL / s. The gel fiber is obtained through solution exchange, and the gel fiber is taken out and soaked in water for several hours, then taken out, and then dried naturally under tension. After testing, the electrical conductivity of the prepared carbon nano-based fibers (i.e. carbon nanotube fibers) was 5.0×10 3 S / cm, the tensile strength is 200MPa.

[0046] see figure 1 The physical figure of the carbon nanotube fiber continuously prepared...

Embodiment 2

[0048] In this example, the carbon nanotube powder with a length of 50 μm is dispersed in deionized water through PVP. The mass ratio of PVP to carbon nanotube powder is 0.1:1. 50 MPa to obtain a carbon nanotube dispersion, and the carbon nanotube content in the obtained carbon nanotube dispersion is 2wt%.

[0049] The prepared carbon nanotube dispersion was passed through a 200 μm spinneret hole, and extruded into an ethylene glycol coagulation bath at 2 μL / s to obtain gel fibers through solution exchange, and the gel fibers were taken out and soaked in water for several hours , and then take it out, add tension to dry naturally, and take out a part of the dried fiber for testing.

[0050] The electron micrograph of the carbon nanotube fiber that present embodiment obtains please refer to Figure 4a-Figure 4c .

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Abstract

The invention discloses a carbon nano-based fiber as well as a preparation method and an application thereof. The preparation method comprises the following steps of providing a carbon nano tube dispersion liquid comprising a carbon nano tube and a dispersant, wherein the content of the carbon nano tube in the carbon nano tube dispersion liquid is 1.01-3wt%; and taking the carbon nano tube dispersion liquid as a spinning liquid, injecting the spinning liquid into coagulating bath by adopting a wet spinning technology, thereby obtaining the carbon nano-based fibers, wherein the coagulating bathcomprises an organic solvent and/or an organic solvent and water mixed solution, and the organic solvent comprises acetone, ethanol, isopropanol, ethylene glycol, 1, 2-propylene glycol and the like.According to the preparation method, the use of strong acid for treatment of the carbon nano tube is avoided, and influence to the intrinsic structure of the carbon nano tube is reduced; meanwhile, through coagulating liquid ingredient and proportion control, preparation and performance regulation of different microcosmic structure carbon nano-based fibers is realized, and in addition, the prepared carbon nano-based fiber has relatively high conductivity and mechanical performance, can be used for the fields of fiber-like energy storage devices, wires, sensing and the like.

Description

technical field [0001] The invention relates to a carbon nanotube fiber, in particular to a carbon nanometer-based fiber with good electrical conductivity and mechanical properties, a preparation method thereof, and an application thereof, belonging to the technical field of nanomaterials. Background technique [0002] Since carbon nanotubes appeared in the public eye in 1991, they have greatly promoted the development of nanoscience and nanotechnology. The special structure of carbon nanotubes endows them with excellent properties, and has a wide range of applications in materials such as aerospace and aerospace vehicles, capacitors, composite materials, and biosensors. However, the complex shape of carbon nanotubes and the strong van der Waals force between the tubes make them difficult to dissolve in water and organic solvents, which limits the practical application of carbon nanotubes. In order to give full play to the excellent properties of carbon nanotubes, it is nec...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F1/09
CPCD01F9/12D01F1/09
Inventor 吕卫帮姜欣荣曲抒旋周庚衡蒋瑾
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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