Carbon/carbon composite material and preparation method thereof

A technology of carbon composite materials and carbon fiber prefabrication, which is applied in the field of C/C composite materials and its preparation, which can solve the problems of environmental pollution, high synthesis temperature, discharge of a large amount of waste gas or soot particles, and achieve low preparation cost and high reaction temperature. Low, avoid the effect of surface crusting

Active Publication Date: 2015-09-30
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still uses non-renewable fossil fuels as raw materials to prepare carbon/carbon composite materials. The synthesis temperature is h

Method used

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  • Carbon/carbon composite material and preparation method thereof
  • Carbon/carbon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] (1): Dissolve glucose in water to obtain a glucose solution with a concentration of 100g / L;

[0033] (2): Change the density to 0.2g / cm 3 The cylindrical integral carbon felt is sleeved on the heating tube; the outer diameter of the cylindrical carbon felt is 1 / 3 of the inner diameter of the reactor.

[0034] (3): Add the glucose solution obtained in step (1) into the reaction kettle, and assemble the heating tube of the carbon fiber preform in step (2) and the reaction kettle to start the heating reaction. The reaction temperature is controlled at 120°C, and the reaction The time is controlled at 8h, and the filling ratio is controlled at 0.4.

[0035] (4): Open the reactor after the reaction in step (3), pour out the liquid in the reactor, and then add the glucose solution in step (1), the filling ratio is controlled at 0.4, and then the reaction is heated, and the reaction temperature is controlled at 120℃, the reaction time is controlled at 8h.

[0036] ...

Example Embodiment

[0038] Example 2:

[0039] (1): Dissolve sucrose in water to obtain a sucrose solution with a concentration of 200g / L;

[0040] (2): Set the density to 0.4g / cm 3 The cylindrical carbon fiber needled felt is sleeved on the heating tube, and the outer diameter of the cylindrical carbon fiber needled felt is 1 / 2 of the inner diameter of the reactor.

[0041] (3): Put the sucrose solution obtained in step (1) into the reaction kettle, and assemble the heating tube with the carbon fiber preform in step (2) and the reaction kettle to start the heating reaction. The reaction temperature is controlled at 150°C, and the reaction time Control at 4h, and control the filling ratio at 0.5.

[0042] (4): Open the reactor after the reaction in step (3), pour out the liquid in the reactor, and then add the sucrose solution in step (1), the filling ratio is controlled at 0.5, and then the reaction is heated, and the reaction temperature is controlled at 150℃, the reaction time is controlled at 4h.

[...

Example Embodiment

[0046] Example 3:

[0047] (1): Stir the starch in water evenly, the concentration of starch in the solution is 300g / L;

[0048] (2): Change the density to 0.2g / cm 3 The cylindrical needled carbon felt is sheathed on the heating tube; the outer diameter of the cylindrical needled carbon felt is 2 / 3 of the inner diameter of the reactor.

[0049] (3): Put the starch solution obtained in step (1) into the reactor, and assemble the heating tube of the carbon fiber preform in step (2) and the reactor to start the heating reaction. The reaction temperature is controlled at 180°C, and the reaction time Control at 6h, and control the filling ratio at 0.6.

[0050] (4): Open the reactor after the reaction in step (3), pour out the liquid in the reactor, and then add the starch solution in step (1), the filling ratio is controlled at 0.6, and then the reaction is heated, and the reaction temperature is controlled at 160℃, the reaction time is controlled at 6h.

[0051] (5): Repeat step (4) five...

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Abstract

The invention relates to a carbon/carbon composite material and a preparation method thereof. The preparation method comprises the following steps: dissolving or dispersing a biomass carbon source in water to prepare a carbon source water solution or suspension; adding the carbon source water solution or suspension into a reaction kettle, putting a heating tube sheathed with a carbon fiber prefabricated body into a reaction kettle, and heating to perform hydrothermal carbonization reaction; and pouring out the liquid in the reaction kettle, adding the carbon source water solution or suspension into the reaction kettle, and heating to perform hydrothermal carbonization reaction, thereby obtaining the carbon/carbon composite material. The invention provides a novel thermal-gradient hydrothermal method for preparing a carbon/carbon composite material. On the basis of the characteristics of renewable hydrothermal carbonization raw material, low synthesis temperature and environment friendliness, the method also has the characteristic of high densification efficiency in the thermal-gradient deposition technique.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a C / C composite material and a preparation method thereof. Background technique [0002] As a new type of carbon material with unique properties, carbon / carbon composite material combines the excellent performance of carbon fiber and carbon material. It is not limited to aviation, aerospace and other cutting-edge technology fields, but has been extended to many civilian fields such as transportation, chemical industry, sports and medicine. From the liquid phase impregnation technology using petroleum or coal tar pitch, to the chemical vapor deposition technology using gaseous hydrocarbons, and the latest film boiling deposition technology using liquid hydrocarbons, petrochemical fuels and their derivatives are the best choice for the preparation of carbon / carbon composites. important carbon source. However, fossil fuels are non-renewable resour...

Claims

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Application Information

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IPC IPC(8): C04B35/83
Inventor 欧阳海波李翠艳黄剑锋费杰曹丽云孔新刚许占位
Owner SHAANXI UNIV OF SCI & TECH
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