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Ultra-fine carbon element powder surface resin synthetic process

A synthetic resin and powder technology, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of difficult large-scale industrial production, long production cycle, and easy cracking of products, so as to increase the molecular weight and reduce the amount of waste liquid , low cost effect

Inactive Publication Date: 2010-09-08
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the use of mesophase carbon microspheres to produce high-density and high-strength carbon materials requires a long production cycle and high cost.
When delayed coke is used, the shrinkage rate after sintering is very large, the product is easy to crack, and the yield is low
Therefore, the above two methods are difficult to carry out large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: the technique of synthesizing thermoplastic phenolic resin on the surface of ultrafine carbon powder, its step is:

[0044] (1) Weighing 400 grams of coke powder with a particle size of less than 5 microns and 100 grams of spherical graphite powder with a particle size of less than 2 microns are added to a kneading pot with a volume of 1 liter with a gas feeding pipe, a condensation reflux device and a vacuum device , stir evenly, and heat up to 70°C;

[0045] (2) Weigh 100 grams of phenol (20% of the carbon powder quality) and 10 grams of oxalic acid (10% of the phenol quality) and join in the kneading pot, close the kneading pot and the gas feed pipe, condensation reflux device and vacuum device valve, continue to stir, control the temperature at 70°C, and mix for 20 minutes;

[0046] (3) Open the gas feeding pipe and the valve of the condensing reflux device, feed a mixed gas containing 34 grams of formaldehyde (the mass molar ratio of formaldehyde and...

Embodiment 2

[0049] Embodiment 2: the technique of synthesizing thermosetting phenolic resin on the surface of ultrafine carbon powder, its step is:

[0050] (1) Weigh 500 grams of high-purity graphite powder with a particle size of less than 2 microns and add it to a kneading pot with a volume of 1 liter with a gas feeding tube, a condensation reflux device and a vacuum device, stir evenly, and heat up to 60°C ;

[0051] (2) Weigh 125 grams of phenol (25% of the carbon powder mass) and 10 grams of saturated ammonia solution (8% of the phenol mass) and add them to the kneading pot, close the kneading pot and the gas feed pipe, condensation reflux device and vacuumize The valve of the device, continue to stir, control the temperature at 60°C, and mix for 10 minutes;

[0052] (3) Open the gas feeding pipe and the valve of the condensing reflux device, feed a mixed gas containing 44 grams of formaldehyde (the molar ratio of formaldehyde to phenol is 1.1:1) and 3 grams of water, and control t...

Embodiment 3

[0055] Embodiment 3: the technique of synthesizing o-methyl epoxy phenolic resin on the surface of ultrafine carbon powder, its step is:

[0056] (1) Weigh 500 grams of high-purity graphite powder with a particle size of less than 2 microns and add it to a kneading pot with a volume of 1 liter with a gas feeding tube, a condensation reflux device and a vacuum device, stir evenly, and heat up to 50°C ;

[0057] (2) Weighing 100 grams of o-cresol (20% of the carbon powder quality) and a concentration of 50% sodium hydroxide solution 20 grams (20% of the o-cresol quality) join in the kneading pot, close the kneading pot and The gas feeding pipe, the valve of the condensing reflux device and the vacuum device, continue to stir, the temperature is controlled at 50°C, and the mixture is mixed for 10 minutes;

[0058] (3) Open the gas feeding pipe and the valve of the condensing reflux device, pass into a mixed gas containing 33 grams of formaldehyde (the mass molar ratio of formald...

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Abstract

The invention relates to a process for manufacturing a high-density and high-strength carbon material, in particular to a process for synthesizing phenolic resin on the surface of superfine carbon powder; and the mixed powder manufactured by the process can be used for manufacturing a high-density and high-strength carbon-graphite material. The process is characterized in that an absorption film is first evenly and stably formed by phenol on the surface of the superfine carbon powder due to the physical and chemical absorption on the surface of the superfine carbon powder; after formaldehyde gas is introduced, phenolic resin is synthesized in a liquid film on the surface of the carbon powder, thus obtaining the mixed powder with core-shell structure. The synthesis process of the inventioneffectively improves the distribution evenness of resin on the surface of carbon powder and the carbon-resin interface bonding force, requires less binder and improves the carbon residue ratio of thebinder, thereby improving the density and strength of carbon materials effectively.

Description

technical field [0001] The invention relates to a production process of high-density and high-strength carbon materials, in particular to a process for synthesizing resin on the surface of ultrafine carbon powder. The mixed powder produced by the process can be used to manufacture high-density and high-strength carbon graphite materials. Background technique [0002] Carbon graphite materials have excellent properties such as high temperature resistance, corrosion resistance, wear resistance, low friction coefficient, and high specific strength, and are widely used in steel, chemical, machinery, automobile, electronics, energy, aerospace and other fields. With the development of industry, the performance requirements of materials are getting higher and higher, and the use environment is also more demanding. In order to improve the comprehensive performance of carbon-graphite materials, using ultra-fine carbon-graphite powder as raw material is an improvement method that rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C09C3/10C09C1/56C08L61/10
Inventor 李春林陈建夏立博
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING