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Method of preparing multi-wall carbon nano-tube by using polymer as raw material

A technology of multi-walled carbon nanotubes and polymers, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the complex preparation process of arc discharge method, the diameter of carbon nanotubes is not neat enough, and the performance of carbon nanotubes is affected. problems, to achieve the effect of scientific and reasonable preparation method, less energy consumption and low production cost

Inactive Publication Date: 2008-08-13
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the arc discharge method is relatively complicated, and the requirements for equipment are relatively high.
The currently used chemical vapor deposition method uses hydrocarbon gas as the carbon source. Due to the low flow rate of the gas used, the yield of the prepared carbon nanotubes is very low, and the product contains a large amount of catalyst and amorphous carbon particles. These impurities are serious It affects the performance of carbon nanotubes. In addition, the gas-solid contact is not good enough, and the diameter of the formed carbon nanotubes is not neat enough. In addition, it is difficult to enlarge the catalyst if it is placed in a quartz boat.
So far, there is no suitable reaction process that can be used to prepare carbon nanotubes in large quantities

Method used

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  • Method of preparing multi-wall carbon nano-tube by using polymer as raw material
  • Method of preparing multi-wall carbon nano-tube by using polymer as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Using polyethylene as raw material and ferrocene as catalyst, accurately weigh 2.00g of dry polyethylene, 0.80g of maleic anhydride grafted polyethylene, and 0.060g of ferrocene, and mix them evenly; put the mixed solids into an autoclave, React at 700°C for 15 hours. After the reaction, cool the reactor to room temperature, take out the reaction product, wash with acid to remove the catalyst, and dry to obtain a sample. FIG. 1 is a transmission electron micrograph of the helical carbon nanotubes obtained in this example. It can be seen from Figure 1 that at 700°C, ferrocene is used as a catalyst to catalyze the decomposition of polyethylene, and the helical carbon nanotubes obtained by catalyzing the decomposition of polyethylene are parallel bamboo-shaped structures with a diameter of about 80 nanometers.

Embodiment 2

[0021] Using polyethylene as raw material and metallic nickel as catalyst, accurately weigh 2.00g of dry polyethylene, 0.50g of maleic anhydride grafted polyethylene, and 0.10g of metallic nickel, and mix them evenly; The reaction was carried out at high temperature for 10 hours. After the reaction, the reactor was cooled to room temperature, the reaction product was taken out, the catalyst was removed by pickling, and the sample was dried.

Embodiment 3

[0023] Using polypropylene as a raw material and ferrocene as a catalyst, accurately weigh 2.00 g of dry polypropylene, 0.50 g of maleic anhydride grafted polypropylene, and 0.10 g of ferrocene, and mix them uniformly; put the mixed solids into an autoclave, React at 600°C for 25 hours. After the reaction, cool the reactor to room temperature, take out the reaction product, pickle to remove the catalyst, and dry to obtain a sample. FIG. 2 is a field emission electron micrograph of the carbon nanotubes obtained in this example. It can be seen from Figure 2 that at 600°C, ferrocene is used as a catalyst to catalyze the decomposition of polypropylene to obtain mainly carbon nanotubes, the length of which is several microns to tens of microns, and the diameter is between 40-70 nanometers.

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Abstract

The present invention provides a method of multi-walled carbon nantubes using polymer as raw material, belonging to inorganic function material synthesizing technology field, in particular: polyethylene or polypropylene, PEMA or polypropylene and catalyst are placed in the sealing container according to a certain proportion, calculated by weight percentage, polyethylene or polypropylene : PEMA or polypropylene : catalyst is 1:0.25-0.5:0.05-0.005; baking 10-25 hour under the temperature 600-850 Celsius, cooling to room temperature, removing reactant, acid washing to remove catalyst, the product is obtained by drying. The invention has a simple operation, high productive rate, lower cost, and is a green method for acquiring carbon nantubes, the multi-walled carbon nantubes have wide application, used as hydrogen storage material, high strength composite field, catalyst carrier etc.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic functional materials, and relates to carbon nanotubes with several shapes and a preparation method thereof, in particular to a method for preparing carbon nanotubes by using a high molecular polymer as a raw material through a catalytic cracking method. Background technique [0002] Carbon nanotubes are quasi-one-dimensional quantum materials with a special structure (the radial dimension is on the order of nanometers, the axial dimension is on the order of microns, and both ends of the tube are basically sealed), which is mainly composed of hexagonal arrays. Carbon atoms form several to tens of layers of coaxial tubes. It can be regarded as a seamless hollow nano-scale coaxial cylinder rolled by sheet-structured graphite, and its two ends are sealed by fullerene hemispheres. According to the number of curled layers, it can be divided into single-walled carbon nanotubes and multi-w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 孔庆红张俊豪吴春笃马中飞吕瑞彬
Owner JIANGSU UNIV
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