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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 high, and a large amount of waste gas or soot particles with complex structures will be discharged during the cracking process, polluting the environment.

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

Embodiment 1

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

[0033] (2): Set the density to 0.2g / cm 3 The cylindrical overall carbon felt is set 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, assemble the heating tube with the carbon fiber prefabricated body in step (2) and the reaction kettle, and start the heating reaction. The reaction temperature is controlled at 120°C. The time is controlled at 8h, and the filling ratio is controlled at 0.4.

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

[0036] (5): Repeat...

Embodiment 2

[0039] (1): Dissolving 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 needle felt is set on the heating tube, and the outer diameter of the cylindrical carbon fiber needle felt is 1 / 2 of the inner diameter of the reactor.

[0041] (3): Add the sucrose solution obtained in step (1) into the reaction kettle, assemble the heating tube of the carbon fiber prefabricated body in step (2) and the reaction kettle, and start the heating reaction. The reaction temperature is controlled at 150°C, and the reaction time is Controlled at 4h, the filling ratio is controlled at 0.5.

[0042](4): Open the reaction kettle after the reaction of step (3), pour out the liquid in the reaction kettle, then add the sucrose solution in the step (1), the filling ratio is controlled at 0.5, then heat the reaction, and the reaction temperature is controlled at 150°C, the reaction time is controlled at...

Embodiment 3

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

[0048] (2): Set the density to 0.2g / cm 3 The cylindrical needle-punched carbon felt is set on the heating tube; the outer diameter of the cylindrical needle-punched carbon felt is 2 / 3 of the inner diameter of the reactor.

[0049] (3): Add the starch solution obtained in step (1) into the reaction kettle, assemble the heating tube with the carbon fiber prefabricated body in step (2) and the reaction kettle, and start the heating reaction. The reaction temperature is controlled at 180°C, and the reaction time is Controlled at 6h, the filling ratio is controlled at 0.6.

[0050] (4): Open the reaction kettle after the reaction of step (3), pour out the liquid in the reaction kettle, then add the starch solution in step (1), the filling ratio is controlled at 0.6, and then heat the reaction, and the reaction temperature is controlled at 160°C, the reaction time is contr...

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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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