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Single-layer carbon nano-tube non-woven fabrics and preparation method thereof

A technology of single-layer carbon nanotubes and non-woven fabrics, which can be used in non-woven fabrics, textiles, papermaking, fiber processing, etc., and can solve problems such as low carbon conversion rate, limited carbon nanotubes excellent performance, and slow decomposition speed. , to achieve the effect of increasing mechanical properties, excellent mechanical properties, and good operability

Inactive Publication Date: 2008-09-10
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under a given reaction temperature and pressure, the decomposition rate of CO is much slower than that of hydrocarbons, and the production of single-layer carbon nanotubes generally requires a relatively large flow of CO, so that the conversion of carbon The rate is relatively low, so it is not suitable for large-scale production of single-walled carbon nanotubes
Moreover, none of the above preparation methods can obtain single-layer carbon nanotube structures with macroscopic dimensions.
[0003] In addition, due to size limitations, the application of single-layer carbon nanotubes has not been able to be carried out on a large scale.
Although it has been reported in the literature that large-area carbon nanotube films ("backpaper") have been obtained through post-ultrasonic filtration and other processing methods, the mechanical strength of the obtained carbon nanotube films is very low, which limits the excellent performance of carbon nanotubes in the application. full play of the process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Single-layer carbon nano-tube non-woven fabrics and preparation method thereof
  • Single-layer carbon nano-tube non-woven fabrics and preparation method thereof
  • Single-layer carbon nano-tube non-woven fabrics and preparation method thereof

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Embodiment 1

[0039] Example 1: Growth of original single-layer carbon nanotube nonwoven fabric

[0040] First design the following experimental device for preparing single-layer carbon nanotube non-woven fabrics by floating catalytic method:

[0041] The schematic diagram of the equipment is as follows figure 1As shown, the experimental setup consists of two resistance furnaces with rated temperatures of 1250 °C and 300 °C, respectively. The reaction chamber used in the experiment is a quartz tube with a special structure, and its structure includes: the inner diameter of the outer large quartz tube is 30-40mm, and the length is 1-1.4m; the inner diameter of the small quartz tube inserted inside is 6-10mm, The length is 30-60cm. The port for the insert tubing is located throughout the middle of the reactor.

[0042] Then configure the following catalyst mixture:

[0043] Chemically pure ferrocene and sublimed sulfur were weighed and uniformly mixed at a molar ratio of 16:1, and ground ...

Embodiment 2

[0049] Embodiment 2: Purification of the original single-layer carbon nanotube non-woven fabric

[0050] The original single-layer carbon nanotube non-woven fabric prepared by the present invention is purified by gas-phase oxidation combined with concentrated hydrochloric acid immersion.

[0051] First, the original grown single-layer carbon nanotube non-woven fabric sample was placed in a resistance furnace at 350°C for oxidation, and kept in an air atmosphere for 48 hours; then the sample was placed in concentrated hydrochloric acid (concentration of 37%wt) Soak for one week; finally, the samples were removed from the hydrochloric acid and rinsed with deionized water until the pH value was 7.

[0052] Figure 4a-Figure 4b It is a scanning electron microscope image of the plane and fracture of the purified single-layer carbon nanotube nonwoven fabric of the present invention. It can be seen from the figure that after the purification treatment, almost all the catalyst parti...

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Abstract

The invention provides a non-woven fabric with monolayer carbon nanotubes and a preparation method thereof. The non-woven fabric is formed through mutual tangling of a plurality of monolayer carbon nanotube bundles; the area of the non-woven fabric is between 10-100cm <2> and the thickness of the non-woven fabric is 100nm-20mu m; the diameters of the monolayer carbon nanotube bundles are 100-300GPa. After simply purification, all catalyst particles in the non-woven fabric with the monolayer carbon nanotubes can be almost eliminated, and the figuration of the non-woven fabric still keeps complete. The non-woven fabric with monolayer carbon nanotubes has higher mechanical strength and macroscopical area. The preparation method has the advantages of simplicity, flexibility, environmental protection, non-pollution chemistry and low energy consumption, and the obtained non-woven fabric with the monolayer carbon nanotubes has the advantages of high productivity, stable structure and strong operability..

Description

technical field [0001] The invention relates to a non-woven fabric, in particular to a single-layer carbon nanotube non-woven fabric and a preparation method thereof. The method realizes a large-area and high-strength single-layer carbon nanotube by designing reaction equipment and optimizing the growth process Controllable preparation of nonwovens. Background technique [0002] Single-layer carbon nanotubes are seamless columnar structures formed by curling only one graphite layer. They have unique electronic and mechanical properties, and have potential application prospects in the fields of nanodevices and nanocomposites. The current methods for preparing single-layer carbon nanotubes mainly include laser ablation and arc discharge, but the cost is relatively high due to the extreme preparation conditions. In addition, by pyrolyzing carbon-containing compound molecules such as CO, CH on nanoscale metal particles 4 or C 2 h 4 Single-layer carbon nanotubes can also be p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/42D04H13/00D01F9/127D06M11/34D06M11/13
Inventor 宋礼解思深周维亚马文君
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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