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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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  • 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 the carbon foam during high-temperature heat treatment. The two-dimensional eddy layered structure makes the original heat transfer channels of carbon foam more complicated, which affects the heat conduction effect of carbon foam materials.

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

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Effect test

Embodiment 1

[0021] Weigh 15g and 58g of formaldehyde and phenol respectively and put them into a three-necked flask. At the same time, add NaOH with a concentration of 3wt.%, and heat in a water bath to 90°C for reaction; when the reaction system reaches an appropriate viscosity, stop heating to obtain a thermosetting phenolic resin.

[0022] Weigh 1.75g ​​of hollow microspheres and add them to 3g of liquid phenolic resin in batches, perform mechanical stirring and ultrasonic dispersion alternately for 1 hour, inject into the mold for molding; put it into a drying oven after standing at room temperature for 24 hours, cure at 80°C for 12 hours, and then raise the temperature Cured at 150°C for 24 hours to obtain phenolic foam.

[0023] Put the phenolic foam into a vacuum resistance furnace, and slowly raise the temperature to 800 °C under the protection of Ar gas for carbonization treatment to obtain a pure carbon foam sample, whose microstructure is as follows: figure 1 shown.

[0024] T...

Embodiment 2

[0026] Weigh 15g and 58g of formaldehyde and phenol respectively and put them into a three-necked flask. At the same time, add NaOH with a concentration of 3wt.%, and heat in a water bath to 90°C for reaction; when the reaction system reaches an appropriate viscosity, stop heating to obtain a thermosetting phenolic resin.

[0027] Weigh 1.75g ​​of hollow microspheres and 0.1425g of montmorillonite particles, add them to 3g of liquid phenolic resin in batches, perform mechanical stirring and ultrasonic dispersion alternately for 1 hour, inject them into molds and press them into molds; put them in a drying oven after standing at room temperature for 24 hours , cured at 80°C for 12h, and then heated to 150°C for 24h 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 carbonization treatment to obtain a sample of m...

Embodiment 3

[0031] Weigh 15g and 58g of formaldehyde and phenol respectively and put them into a three-necked flask. At the same time, add NaOH with a concentration of 3wt.%, and heat in a water bath to 90°C for reaction; when the reaction system reaches an appropriate viscosity, stop heating to obtain a thermosetting phenolic resin.

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

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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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