Nanopore thermal insulation material and preparation method thereof

A thermal insulation material and nanopore technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of difficult machining, easy powder and slag drop, high manufacturing cost, etc., and achieve high service temperature and thermal insulation performance Good, strong effect

Active Publication Date: 2020-04-17
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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  • Nanopore thermal insulation 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 nanopore thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: diluting 5-30 parts by weight of thermosetting resin with water or absolute ethyl alcohol until the solid phase content is 10wt%-40wt%; uniformly mixing and stirring an obtained thermosetting resin diluent, 20-90 parts by weight of nano powder and2-30 parts by weight of an opacifying agent; uniformly mixing 10-80 parts by weight of polyurethane foam with the obtained particles under a high-speed stirring condition; pouring the obtained viscousparticles into a mold for molding; drying the obtained block body; and taking out the dried material from the mold, and carbonizing under a vacuum or inert atmosphere condition. According to the thermal insulation material disclosed by the invention, the carbon closed pores are adopted to wrap the nano-powder, so that the highest use temperature can be 1200 DEG C in a vacuum or inert atmosphere,and is nearly doubled compared with the use temperature of a common silicon oxide aerogel product.

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 Applications(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
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