Preparation method of nano montmorillonite modified resin-based carbon foam heat-insulating material

An insulating material and resin-based technology, which is applied in the field of preparation of nano-montmorillonite modified resin-based carbon foam insulating materials, can solve the problems of complex heat transfer channels, affecting the thermal conduction effect of carbon foam materials, and the like, so as to improve the thermal insulation performance. Effect

Inactive Publication Date: 2014-01-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1560-1564" introduced the preparation of montmorillonite-modified mesophase pitch carbon foams. It pointed out that after the introduction of montmorillonite, its unique intercalation structure changed the original pore structure of

Method used

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  • Preparation method of nano montmorillonite modified resin-based carbon foam heat-insulating material
  • Preparation method of nano montmorillonite modified resin-based carbon foam heat-insulating material
  • Preparation method of nano montmorillonite modified resin-based carbon foam heat-insulating material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] 15g and 58g of formaldehyde and phenol were respectively weighed into the three-necked flask, and NaOH with a concentration of 3wt.% was added simultaneously, and the water bath was heated to 90°C for reaction; when the reaction system reached an appropriate viscosity, the heating was stopped to obtain a thermosetting phenolic resin.

[0022] 1.75g ​​of hollow microspheres were weighed and added to 3g of liquid phenolic resin in batches, mechanical stirring and ultrasonic dispersion were alternately performed for 1 hour, and then injected into the mold for molding; after standing at room temperature for 24 hours, placed in a drying oven, cured at 80 °C for 12 hours, and then heated up Cured at 150°C for 24h to obtain phenolic foam.

[0023] The phenolic foam was placed in a vacuum resistance furnace, and the temperature was slowly raised to 800 °C under the protection of Ar gas for carbonization treatment to obtain a pure carbon foam sample. Its micr...

Example Embodiment

[0025] Example 2:

[0026] 15g and 58g of formaldehyde and phenol were respectively weighed into the three-necked flask, and NaOH with a concentration of 3wt.% was added simultaneously, and the water bath was heated to 90°C for reaction; when the reaction system reached an appropriate viscosity, the heating was stopped to obtain a thermosetting phenolic resin.

[0027] Weigh 1.75g ​​of hollow microspheres and 0.1425g of montmorillonite particles respectively, add them to 3g of liquid phenolic resin in batches, alternately perform mechanical stirring and ultrasonic dispersion for 1 hour, and inject them into a mold for molding; let stand for 24 hours at room temperature and put them in a drying oven , cured at 80 °C for 12 h, and then heated to 150 °C for 24 h to obtain montmorillonite modified phenolic foam.

[0028] The obtained modified phenolic foam was placed in a vacuum resistance furnace, and the temperature was slowly raised to 800 °C under the protection of Ar gas for ...

Example Embodiment

[0030] Example 3:

[0031] 15g and 58g of formaldehyde and phenol were respectively weighed into the three-necked flask, and NaOH with a concentration of 3wt.% was added simultaneously, and the water bath was heated to 90°C for reaction; when the reaction system reached an appropriate viscosity, the heating was stopped to obtain a thermosetting phenolic resin.

[0032] Weigh 1.75g ​​of hollow microspheres and 0.3325g of montmorillonite particles respectively, add them to 3g of liquid phenolic resin in batches, alternately perform mechanical stirring and ultrasonic dispersion for 1 hour, and inject them into a mold for molding; put them in a drying oven after standing at room temperature for 24 hours. , cured at 80 °C for 12 h, and then heated to 150 °C for 24 h to obtain montmorillonite modified phenolic foam.

[0033] The obtained phenolic foam was placed in a vacuum resistance furnace, and the temperature was slowly raised to 800 °C under the protection of Ar gas for carboni...

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Abstract

The invention relates to a preparation method of a nano montmorillonite modified resin-based carbon foam heat-insulating material. The carbon foam material prepared by the preparation method is mostly in a closed-pore structure; and based on the characteristics of introduced montmorillonite particles, such as low heat conductivity and nano-level size, the heat-insulating property of the carbon foam at high temperature is effectively enhanced. After the montmorillonite is added, the heat conductivity of the carbon foam at 800 DEG C is reduced from 0.854W/m.K to 0.5884W/m.K.

Description

technical field [0001] The invention relates to a preparation method of nano-montmorillonite modified resin-based carbon foam heat insulation material. Background technique [0002] Microspherical carbon foam is a lightweight porous ceramic material, because of its low density, low thermal conductivity, low thermal expansion coefficient, and can be heated to 3000 ° C under anaerobic conditions without melting or softening, etc. It has been successfully used in high-temperature heat insulation fields such as aviation, aerospace and civil commerce. The designability of structure and performance makes it an incomparable advantage as a new generation of high temperature resistant heat insulation material. The thermal conductivity of carbon materials is relatively high, and only relying on the hollow microsphere structure to reduce the thermal conductivity of the overall material is limited; in order to meet actual needs, it is necessary to introduce a second phase material to f...

Claims

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Application Information

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IPC IPC(8): C04B32/00C01B31/02C01B32/05
Inventor 李贺军王斌王茜张雨雷
Owner NORTHWESTERN POLYTECHNICAL UNIV
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