Polyolefin burning process of synthesizing carbon nanotube

A technology for carbon nanotubes and polyolefins, which is applied in the field of synthesizing carbon nanotubes by a combustion method, can solve problems such as complex equipment, and achieve the effects of low price, abundant sources, and overcoming expensive raw materials.

Inactive Publication Date: 2005-07-13
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As reported in ZL01118349.7, a fluidized bed cracking reactor is used, CO and low-carbon hydrocarbons below 7 carbons are used as carbon sources, hydrogen is used as a reducing gas, and inert gas protection is used in the preparation process. The reaction device includes a main reactor, catalyst activation device, gas distributor, gas-solid separator and product degassing section, the equipment used is complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Polypropylene, maleic anhydride content is the acid-anhydrided polypropylene of 1% weight ratio and particle diameter is the modified montmorillonite of 10 microns, and the particle diameter is the nickel-supported catalyst of 30 microns in 80:10:5:5 weight ratio At the same time, it enters into an internal mixer, and performs melt mixing at 200° C. and 70 rpm for 10 minutes to obtain a polypropylene mixture.

[0019] Take 1 g of the above mixture and put it in a 15 ml crucible, and put a cover on the crucible. Heat the bottom of the crucible with the outer flame of a gas lamp. After a few seconds, the polymer starts to burn. At this time, the temperature inside the crucible was 660°C. After the polymer no longer burns, remove the crucible and cool it to room temperature in a cool place. At this point, a black mixture of carbon nanotubes, nickel catalyst and montmorillonite was obtained.

[0020] Add 30% hydrofluoric acid to the above black mixture, and place it und...

Embodiment 2

[0022] 85% recycled polypropylene, 10% anhydrided polypropylene with maleic anhydride content of 2.5% by weight and 2.5% modified montmorillonite with a particle size of 30 microns, 2.5% nickel with a particle size of 20 microns The supported catalyst enters the internal mixer at the same time, and is melt-mixed at 200° C. and 70 rpm for 10 minutes to obtain a polypropylene mixture.

[0023] Take 3 grams of the above mixture and put it in a 15 ml crucible, and cover the crucible. Use the outer flame of a gas lamp to heat the bottom of the crucible. After a few seconds, the polymer starts to burn. At this time, the temperature inside the crucible was 700°C. After the polymer no longer burns, remove the crucible and cool it to room temperature in a cool place. At this point, a black mixture of carbon nanotubes and nickel-supported catalyst was obtained.

[0024] Add 10% hydrofluoric acid to the above black mixture, and place it under magnetic stirring for 30 hours. Then cent...

Embodiment 3

[0026] 5% nickel-supported catalyst with a particle size of 50 microns was mixed with 70% recycled polypropylene, 10% anhydrided polypropylene with a maleic anhydride content of 2% by weight and 15% modified montmorillonite with a particle size of 40 microns by weight The soil was added to the internal mixer at the same time, and melt-mixed at 200° C. and 70 rpm for 10 minutes to obtain a polypropylene mixture.

[0027] Take 2 grams of the above mixture and put it in a 15 ml crucible, and put a cover on the crucible. Heat the bottom of the crucible with the outer flame of a gas lamp. After a few seconds, the polymer starts to burn. At this time, the temperature inside the crucible was 850°C. After the polymer no longer burns, remove the crucible and cool it to room temperature in a cool place. At this time, a black mixture of carbon nanotubes, nickel supported catalyst and montmorillonite was obtained.

[0028] Add 20% hydrofluoric acid to the above black mixture, and plac...

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Abstract

The present invention is polyolefin burning process of synthesizing carbon nanotube. Polyolefin, expander, organic matter modified montmorillonite and nickel-loading catalyst in certain proportion are mixed in n. banbury mixer or double-screw extruder, and mixture is set inside crucible and heated in gas flame to prepare carbon nanotube through combustion at 660-850 deg.c. The present invention uses cheap polyolefin as carbon source material and common equipment and has the advantages of low cost.

Description

technical field [0001] The invention relates to a method for synthesizing carbon nanotubes by burning polyolefins, in particular to a method for synthesizing carbon nanotubes by burning polyolefin-montmorillonite composite materials under the action of a supported catalyst. Background technique [0002] Carbon nanotubes are characterized by diameters ranging from several angstroms to tens of nanometers, and aspect ratios ranging from tens to thousands. Carbon nanotubes have been widely used due to their excellent physical and mechanical properties and electrical conductivity. In recent years, there have been more and more studies on the use of carbon nanotubes to modify polymers, and the carbon nanotubes used do not require a perfect structure, but the demand is large, which requires low preparation costs and high output. Carbon nanotube synthesis technology. [0003] Usually, carbon nanotubes are prepared by arc generation method, laser evaporation method, electrochemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 唐涛陈学成孟晓宇姜治伟陈辉
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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