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Method for preparing Nano carbon balls by using pyrolysis of carbon based network polymer

A technology of carbon nanospheres and polymers, applied in the field of preparation of carbon nanospheres, can solve the problems of difficult separation and purification, expensive equipment, high energy consumption, etc., and achieve simple equipment and process, smooth and dense surface of the balls, and good experimental controllability Effect

Inactive Publication Date: 2008-03-12
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the synthesis of carbon nanospheres, there are currently methods such as chemical vapor deposition, plasma deposition, catalytic pyrolysis, and catalytic reduction. It is only a by-product of certain reactions, so the yield is low, separation and purification are difficult, and it cannot be produced in large quantities, so its application is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Cut and weigh 11.7g of potassium and 6.9g of sodium in a glove box filled with argon, put them into a glass container filled with argon, squeeze and stir the solid potassium and sodium with a glass rod, and make them mix and liquefy into a liquid. Then add 450ml tetrahydrofuran, ultrasonic action, make potassium, sodium and tetrahydrofuran form emulsion; Prepare 40ml of n-pentane organic solution containing trichloroethane of 8mol / L, adjust ultrasonic reactor power to be 500W, frequency is 20kHz, will contain The n-pentane solution of trichloroethane is added dropwise to the potassium-sodium alloy emulsion, the dropping speed is controlled at 1 drop / s, the dropping time is 30 minutes, and the ultrasonication is continued for 60 minutes; 20ml of water is slowly added dropwise to remove the remaining potassium metal from the reaction and sodium, add 200ml of water, transfer the reaction solution into a separatory funnel, stand to separate, and extract the upper organic pha...

Embodiment 2

[0019] Cut and weigh 11.7g of potassium and 6.9g of sodium in an argon-filled glove box and put them into a glass container filled with argon, squeeze and stir the solid potassium and sodium with a glass rod to make them mix and liquefy into a liquid , then add 450ml tetrahydrofuran, ultrasonic action, make potassium, sodium and tetrahydrofuran form emulsion; Prepare 40ml of n-pentane organic solution containing trichlorotoluene of preparation 8mol / L, adjust ultrasonic reactor power to be 500W, frequency is 20kHz, three Add the n-pentane solution of chlorotoluene to the potassium-sodium alloy emulsion drop by drop, the dropping speed is controlled at 1-2drop / s, the dropping time is 20min, and the ultrasonication is continued for 40min; slowly add 20ml of water dropwise to remove the remaining metal from the reaction Potassium and sodium, add 200-300ml of water, transfer the reaction solution into a separatory funnel, let it stand for separation, and extract the upper organic ph...

Embodiment 3

[0022] The Raman spectrum analysis of carbon nanospheres prepared by two different carbon-based network polymers found that the peak shapes of the two were exactly the same, both of which were typical graphitic carbon structures; two diffraction peaks of graphite appeared in the X-ray diffraction spectrum, respectively. Corresponding to the (002), (101) crystal planes of graphite; the carbon nanospheres are solid spheres with a smooth and dense surface without obvious defects according to transmission electron microscope analysis.

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PUM

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Abstract

This invention involves a method to prepare carbon nano ball by pyrogenation of carbon based network polymer. In this method, the alloy of K and Na is used as catalyst and the carbon based network polymer - poly carbophenyl and poly hydrocarbon - is prepared by reductive condensation polymerization of benzotrichloride and trichloroethane. Then, the polymer is placed into magnetic boat and reacted at high temperature with inert gas protection to prepare the carbon nano ball. It has the following characteristics: a. Due to the novel method and simple process, no complex and expensive vapor deposition equipment is needed. B. the surface of the carbon nano ball is smooth without any defects. The carbon ball prepared by this method is expected to use in the area of MEMS, attrition and catalysis and so on.

Description

technical field [0001] The invention relates to a method for preparing carbon nanospheres by pyrolyzing carbon-based network polymers. technical background [0002] Nanomaterials are the most promising third materials after metals and plastics. As functional materials, they are the preferred materials for light, electricity, magnetism, heat and sound. Technology research such as science and microelectronics has played a leading role. Among them, carbon nanomaterials are important materials closely related to the progress of human civilization, and various forms of carbon simple substances and carbon compounds have made great contributions to the development of human beings. In recent years, with the discovery of fullerenes and carbon nanotubes, due to the specific properties of these new carbon-based materials, they have been widely used in many fields, and the related research and development work is quite active. More and more synthesis and Representation methods are kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 杨生荣徐洮阎兴斌岳珊珊
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI