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Process for preparing nano carbon fibres

A technology of nano-carbon fiber and carbon steel, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, etc. It can solve problems such as difficulty in realizing large flames, large-scale synthesis of nano-carbon fibers, difficulty in storing combustion gas, and danger, so as to achieve easy preservation and acquisition , easy to realize and simplify the process

Inactive Publication Date: 2005-06-08
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem that this method exists is: 1, need special burner system; 2) need pre-prepared and extra fine catalyst particles; 2, storage of burning gas is more difficult and dangerous, needs special container: The size is limited by many factors (such as the gas source, the caliber of the flame burner, etc.), and it is difficult to achieve a large flame and synthesize nano-carbon fibers in large quantities.

Method used

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  • Process for preparing nano carbon fibres
  • Process for preparing nano carbon fibres
  • Process for preparing nano carbon fibres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: 1, with A3 # (Q235) The low-carbon steel substrate material is cut into 20×10mm; 2. Polish the use surface of the substrate material according to the above method to obtain a smooth mirror surface; 3. Put the polished use surface of the substrate material into pure nitric acid for 4 seconds; 4. Put the processed substrate material face down, and burn it in the middle of the burning ethanol flame (analytical pure) for 10 minutes or 20 minutes; 5. The burnt matter scraped from the substrate material use face is carbon nanofiber. The scanning electron micrographs and transmission electron micrographs of the carbon nanofibers are shown in Figure 1 ~ Figure 4 .

Embodiment 2

[0026] Embodiment two: adopt 45 # Carbon steel is used as the substrate material, corroded in pure nitric acid for 1 second, and burned in ethanol flame (analytical pure) for 10 minutes. (Other processing is the same as above).

Embodiment 3

[0027] Embodiment 3: 40Cr low-alloy steel is used as the substrate material, etched in pure nitric acid for 10 seconds, and fired in an ethanol flame (analytical pure) for 10 minutes. (Other processing is the same as above).

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Abstract

A method for preparing carbon nanofibers, characterized in that: 1.1 polishing the use surface of the metal substrate material to 50 # ~2000 # ;1.2 Put the processed substrate material face down, facing the burning ethanol or methanol flame, burn it in the temperature range of 550℃~850℃ for 3-60 minutes, then take it out and cool it in the air; 1.3 Scrape the substrate material from the used surface The burning product under it is carbon nanofiber.

Description

technical field [0001] The invention relates to a method for preparing nanometer material, especially a method for preparing nanometer carbon fiber. Background technique [0002] Carbon nanofibers with a diameter of 10nm-500nm are a new nanomaterial. In addition to the characteristics of general carbon fibers, such as low density, high specific strength, high specific modulus, high electrical and thermal conductivity, etc., it also has the advantages of very small number of defects, large specific surface area, and compact structure. In the case that it is still difficult to prepare graphite whiskers in large quantities, carbon nanofibers provide an ideal substitute. In addition, carbon nanofibers have broad application prospects in the fields of catalysts and catalyst supports, anode materials for lithium-ion secondary batteries, electrodes for electric double-layer capacitors, high-efficiency adsorbents, separators, super composite materials, hydrogen storage materials, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/127
Inventor 潘春旭
Owner WUHAN UNIV