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A kind of nanoporous heat insulating material and preparation method thereof

A thermal insulation material and nanopore technology, applied in the field of thermal insulation and thermal insulation materials, can solve the problems of high manufacturing cost, difficult machining, easy to drop powder and slag, etc., and achieve good thermal insulation performance, high service temperature, and thermal insulation The effect of excellent performance

Active Publication Date: 2022-02-15
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Super thermal insulation materials represented by aerogel are expected to be widely used in thermal insulation projects in the industrial field due to their excellent thermal insulation properties, but the material needs to be supercritically dried during the manufacturing process to prevent the material from shrinking , this manufacturing process brings higher manufacturing cost
And the relatively low strength of this type of material has also become a key constraint factor limiting its application.
[0003] In order to solve the strength problem in domestic related research and related products, a large amount of fiber or binder is added to increase its strength. Airgel with a large amount of fiber is easy to drop powder and slag, and it will cause difficult mechanical problems in practical applications. Processing, difficult to process into complex shapes and many other problems
At present, the application temperature of most airgel products in the market is below 650°C, mainly because the reinforcing fiber is glass fiber, which cannot meet the requirements of high-efficiency heat insulation workplaces at higher temperatures

Method used

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  • A kind of nanoporous heat insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for preparing a nanoporous heat insulating material, comprising the following steps:

[0039] 1) Dilute 5 parts by weight of the phenolic resin with water to a solid phase content of 40wt%;

[0040] 2) Mix and stir the thermosetting resin dilution obtained in step 1) with 83 parts by weight of nano-powder and 2 parts by weight of an opacifying agent (the stirring speed is 1000 rpm, and the stirring time is 10 minutes);

[0041] 3) under high-speed stirring condition, the polyurethane foam of 10 weight parts (with the polyether polyol of 45wt%, the isocyanate of 50wt%, the catalyst of 1wt%, the tensio-active agent of 2wt% and the water of 2wt% in 1500-3000 turn Stir at a high speed for 5-20 minutes at a rotating speed of 1 / min to obtain the polyurethane foam) and mix the particles obtained in step 2) evenly (the stirring speed is 3000 rev / min, and the stirring time is 10 minutes);

[0042] 4) Pour the viscous granules obtained in step 3...

Embodiment 2

[0046] This embodiment provides a method for preparing a nanoporous heat insulating material, comprising the following steps:

[0047] 1) Dilute 30 parts by weight of the phenolic resin with absolute ethanol to a solid phase content of 10 wt%;

[0048] 2) Mix and stir the thermosetting resin diluent obtained in step 1) with 30 parts by weight of nano-powder and 5 parts by weight of an opacifying agent (the stirring speed is 800 rpm, and the stirring time is 10 minutes);

[0049] 3) under high-speed stirring condition, the polyurethane foam of 10 weight parts (with the polyether polyol of 45wt%, the isocyanate of 50wt%, the catalyst of 1wt%, the tensio-active agent of 2wt% and the water of 2wt% in 1500-3000 turn Stir at a high speed for 5-20 minutes at a rotating speed of 1 / min to obtain the polyurethane foam) and mix the particles obtained in step 2) evenly (the stirring speed is 2500 rev / min, and the stirring time is 15 minutes);

[0050] 4) Pour the viscous granules obtaine...

Embodiment 3

[0054] This embodiment provides a method for preparing a nanoporous heat insulating material, comprising the following steps:

[0055] 1) Dilute the epoxy resin of 15 parts by weight with absolute ethanol to a solid phase content of 20wt%;

[0056] 2) Mix and stir the thermosetting resin dilution obtained in step 1) with 40 parts by weight of nano-powder and 5 parts by weight of an opacifying agent (the stirring speed is 1000 rpm, and the stirring time is 5 minutes);

[0057] 3) under high-speed stirring condition, the polyurethane foam of 40 weight parts (with the polyether polyol of 45wt%, the isocyanate of 50wt%, the catalyst of 1wt%, the tensio-active agent of 2wt% and the water of 2wt% in 1500-3000 turn Stir at a high speed for 5-20 minutes at a rotating speed of 1 / min to obtain the polyurethane foam) and mix the particles obtained in step 2) evenly (the stirring speed is 3000 rev / min, and the stirring time is 10 minutes);

[0058] 4) Pour the viscous granules obtained i...

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Abstract

The invention relates to a nanoporous heat insulating material and a preparation method thereof. The preparation method comprises the following steps: diluting 5 to 30 parts by weight of a thermosetting resin with water or absolute ethanol to a solid phase content of 10wt%-40wt%; obtaining The thermosetting resin diluent, 20-90 parts by weight of nano-powder and 2-30 parts by weight of sunscreen are mixed and stirred uniformly; under high-speed stirring conditions, 10-80 parts by weight of polyurethane foam and the obtained particles are mixed uniformly; The obtained sticky particles are poured into a mold for molding; the obtained block is dried; the dried material is taken out of the mold and carbonized under vacuum or inert atmosphere conditions. Since the thermal insulation material of the present invention uses carbonaceous closed pores to wrap the nano powder, the maximum operating temperature can be 1200°C under vacuum or an inert atmosphere, which is nearly double the operating temperature of ordinary silica airgel products.

Description

technical field [0001] The invention belongs to the technical field of heat insulation and heat preservation materials, and in particular relates to a nanoporous heat insulation material and a preparation method thereof. Background technique [0002] Energy saving and emission reduction is an important research topic worldwide, and the use of high-efficiency thermal insulation materials is one of the key measures for energy saving and emission reduction. Super thermal insulation materials represented by aerogel are expected to be widely used in thermal insulation projects in the industrial field due to their excellent thermal insulation properties, but the material needs to be supercritically dried during the manufacturing process to prevent the material from shrinking , this manufacturing process brings higher manufacturing costs. And the relatively low strength of this type of material has also become a key constraint factor limiting its application. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/00C04B35/14C04B35/524C04B35/622C04B38/00C08G18/48C08G101/00
CPCC04B35/00C04B35/14C04B35/524C04B35/622C04B38/0022C08G18/48C04B2235/3232C04B2235/3244C04B2235/425C04B2235/3826C04B2235/3418C04B2235/46C04B2235/6581C04B2235/658C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607C08G2110/0083
Inventor 张世超孙现凯方凯孙浩然陈玉峰胡利明王华艾兵陶柳实闫达琛
Owner CHINA BUILDING MATERIALS ACAD