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Asphalt carbon foamed material preparation method

A foam material and carbon foam technology, which is applied in the field of carbon foam material preparation, can solve the problems of poor uniformity of carbon foam material function, poor hole interface distribution and uniformity, poor mixing uniformity, etc., to achieve improved barrier performance and safe working environment Reliable, thermal conductivity reduction effect

Inactive Publication Date: 2006-02-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] J.W Klett USP 6398994 B, 2002.6.4 discloses the use of a technology, which is characterized in that petroleum asphalt and foaming agent are blended and foamed and expanded at a lower pressure, but its defect is that the two-phase material Poor mixing uniformity, resulting in poor distribution and uniformity of the hole interface, so that the uniformity of the function of the carbon foam material is also poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] raw material:

[0025] Clay-modified coal-based mesophase pitch, its performance index: clay content: 5% softening point: 250 ℃ mesophase content: 80% quinoline insoluble matter: 50%

[0026] Clay Type: Montmorillonite

[0027] Clay content: 5% of asphalt weight;

[0028] Clay-modified mesophase pitch is pulverized to 2um, and packed into a mold for compaction. Put the mold into a high-pressure high-temperature reactor, and fill it with nitrogen to 10Kg / cm 2 , raise the temperature to 400°C at a heating rate of 5°C / min, keep it for 30 minutes, then raise it to 500°C at a heating rate of 5°C / min, keep at this temperature for 2 hours, turn off the power and naturally cool down to room temperature, and let go of the kettle Inner gas, so as to obtain a pitch foam material with a fairly uniform pore size and distribution, and then carbonize at 800 ° C for 120 minutes to obtain a pitch carbon foam material.

experiment example 2

[0030] raw material:

[0031] Clay-modified coal-based mesophase pitch, its performance index: clay content: 10% softening point: 300 ℃ mesophase content: 90% quinoline insoluble matter: 60%

[0032] Clay Type: Montmorillonite

[0033] Clay content: 10% of asphalt weight;

[0034] Clay-modified mesophase pitch is pulverized to 5um, and packed into a mold for compaction. Put the mold into a high-pressure high-temperature reaction kettle, and fill it with nitrogen to 80Kg / cm 2 , raise the temperature to 350°C at a heating rate of 5°C / min, keep it for 30 minutes, then raise it to 600°C at a heating rate of 5°C / min, keep at this temperature for 2 hours, turn off the power and naturally cool down to room temperature, and let go of the kettle Inner gas, so as to obtain a bituminous foam material with a fairly uniform pore size and distribution, and then carbonize at 1500 ° C for 120 minutes to obtain a bituminous carbon foam material.

Embodiment 3

[0036] raw material:

[0037] Clay-modified coal-based mesophase pitch, its performance index: Clay content: 5% Softening point: 200°C Mesophase content: 99% Quinoline insoluble matter: 55%

[0038] Clay Type: Montmorillonite

[0039] Clay content: 5% of asphalt weight;

[0040] Clay-modified mesophase pitch is pulverized to 4um, and packed into a mold for compaction. Put the mold into a high-pressure high-temperature reactor, and fill it with nitrogen to 60Kg / cm 2 , raise the temperature to 350°C at a heating rate of 5°C / min, keep it for 30 minutes, then raise it to 500°C at a heating rate of 5°C / min, keep at this temperature for 2 hours, turn off the power and naturally cool down to room temperature, and let go of the kettle Inner gas, so as to obtain a bituminous foam material with a fairly uniform pore size and distribution, and then carbonize at 1000 ° C for 120 minutes to obtain a bituminous carbon foam material.

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PUM

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Abstract

The invention discloses a preparation method for anthraxolite foam material, which comprises following steps: pyrolising and preparing intermediate phase asphalt, adding clay addition agent to adjust performance; putting the product into high-pressure reaction kettle, evacuating and heating to asphalt softening point, holding for 1~180min at 300~600Deg and 10~80kg / cm2; cooling naturally to room temperature; foaming at common temperature to obtain asphalt foam material; carbonizing the product and finally obtaining the objective product, which has well performance and fit to industrial production.

Description

technical field [0001] The invention relates to a preparation method of a carbon foam material, in particular to a preparation method of a pitch carbon foam material. Background technique [0002] Pitch carbon foam material is a new material with thermal stability, high temperature resistance, light specific gravity and large specific surface area. It has excellent thermal insulation performance and mechanical properties. It is used as thermal insulation material in aerospace, navigation, nuclear power and other components. , can bring about a dramatic change in the miniaturization and light weight of the device. [0003] The United States Ultramet's company has developed a reticular carbon foam with a very low thermal conductivity, which can reach 0.085W / m.K, but the compressive strength is only 0.763MPa, and it must go through metal deposition and other processes to improve the strength. [0004] West Virginia University in the United States has developed a carbon foam wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 郁铭芳王依民王燕萍王新营锺继鸣
Owner DONGHUA UNIV
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