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Preparation method of carbon foam heat insulation material added with hollow ceramic balls

A technology of hollow ceramics and heat insulation materials, applied in the field of carbon materials, can solve the problems of low operating temperature, poor heat insulation performance, and low strength, and achieve the effects of uniform cells, high safety, and reliable working environment

Active Publication Date: 2012-11-21
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, my country's high-temperature insulation materials have problems such as high density, low strength, poor thermal insulation performance, and low operating temperature.

Method used

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  • Preparation method of carbon foam heat insulation material added with hollow ceramic balls
  • Preparation method of carbon foam heat insulation material added with hollow ceramic balls
  • Preparation method of carbon foam heat insulation material added with hollow ceramic balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh the raw materials of each component according to the foaming formula of 100 parts of phenolic resin, 4 parts of surfactant, 2 parts of foaming agent and 7 parts of curing agent, add surfactant and foaming agent in sequence in the phenolic resin, and mechanically stir 1 hour, then ultrasonically disperse for 2 hours to make it evenly dispersed. Then, under normal temperature and pressure, after adding a curing agent, a phenolic foam is obtained. After shelling the phenolic foam, put it into a vacuum carbonization furnace and heat it to 800°C at an average rate of 0.5°C / min under vacuum conditions to obtain a carbon foam insulation material. Wherein, the phenolic resin is a liquid resole phenolic resin (viscosity (25°C): 100-120mPa·s); wherein, the surfactant is Tween-80; wherein, the foaming agent is n-pentane; wherein, the curing agent is hydrochloric acid .

[0039] Performance test on this carbon foam insulation material: the density of the material is 0.172g / ...

Embodiment 2

[0041] Weigh each component raw material according to the foaming formula of 100 parts of phenolic resin, 4 parts of surfactant, 2 parts of blowing agent, 7 parts of curing agent, add surfactant, blowing agent in sequence in phenolic resin, and add to 1 wt% hollow ceramic microspheres were added to the mixture. Stir mechanically for 1 hour, then ultrasonically disperse for 2 hours to make the dispersion uniform. Then, under normal temperature and pressure, after adding a curing agent, a phenolic foam is obtained. After the phenolic foam is shelled, it is placed in a vacuum carbonization furnace, and heated to 800°C at an average rate of 0.5°C / min under vacuum conditions to obtain a reinforced carbon foam material. Its microstructure is as follows: image 3 shown. Wherein, the phenolic resin is a liquid resole phenolic resin (viscosity (25°C): 100-120mPa·s); wherein, the surfactant is Tween-80; wherein, the foaming agent is n-pentane; wherein, the curing agent is hydrochloric...

Embodiment 3

[0044] Weigh each component raw material according to the foaming formula of 100 parts of phenolic resin, 4 parts of surfactant, 2 parts of whipping agent, 7 parts of curing agent, add surfactant, whipping agent successively in liquid phenolic resin, and 2 wt% hollow ceramic microspheres were added to the mixture. Stir mechanically for 1 hour, then ultrasonically disperse for 2 hours to make the dispersion uniform. Under normal temperature and pressure, after adding curing agent, phenolic foam is obtained. After the phenolic foam is shelled, it is placed in a vacuum carbonization furnace, and heated to 800°C at an average rate of 0.5°C / min under vacuum conditions to obtain a reinforced carbon foam material. Its microstructure is as follows: Figure 4 shown. Wherein, the phenolic resin is a liquid resole phenolic resin (viscosity (25°C): 100-120mPa·s); wherein, the surfactant is Tween-80; wherein, the foaming agent is n-pentane; wherein, the curing agent is hydrochloric acid ...

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Abstract

The invention relates to a preparation method of carbon foam heat insulation material added with hollow ceramic balls. The method includes the following steps: (1) uniform mixing of raw materials: the foaming formula of phenolic foam comprises the steps: adding 3-5 parts of surfactant, 1-3 parts of foaming agent and 0-2wt% of hollow ceramic microballs to 100 parts of phenolic resin sequentially and uniformly dispersing the mixture by means of combining mechanical stirring and ultrasonic oscillation; (2) adding 5-9 parts of curing agent to the uniformly dispersed mixture of step (1) and after stirring, casting the mixture to a mold to be foamed and solidified, thus obtaining phenolic foam; and (3) carbonized heat treatment: after shelling treatment, putting the phenolic foam in a vacuum carbonization furnace to be heated to the temperature of 800 DEG C at the average rate of 0.5 DEG C / min under vacuum condition, thus obtaining the carbon foam heat insulation material. The high temperature heat insulation material has the advantages of light weight, high strength, low thermal conductivity, low coefficient of heat expansion, low cost, designability and the like.

Description

technical field [0001] The invention provides a method for preparing a carbon foam heat insulating material added with hollow ceramic balls, belonging to the technical field of carbon materials. Background technique [0002] With the advancement and development of science and technology, more stringent requirements are put forward for modern materials, such as high temperature resistance, corrosion resistance, low density, certain mechanical strength, and good heat insulation effect. However, at present, my country's high-temperature insulation materials have problems such as high density, low strength, poor heat insulation performance, and low operating temperature. [0003] As a new generation of thermal insulation materials, carbon foam materials can well meet the requirements of the development of modern science and technology. It has many advantages such as light weight, flame retardancy, impact resistance, good corrosion resistance, and high specific strength. Its amor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 罗瑞盈王少波章劲草李进松苏琛涵
Owner BEIHANG UNIV
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