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Non-toxic high-performance fireproof thermal insulation material and preparation method thereof

A thermal insulation material, high-performance technology, used in ceramic products, other household appliances, household appliances, etc., can solve the problems of low strength, high manufacturing cost, no formation, etc., and achieve the effect of low thermal conductivity and low production cost

Inactive Publication Date: 2018-01-09
绵阳梨坪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current nanoporous super-insulation materials generally have the following defects: (1) High water absorption, if water enters, it will directly lead to the collapse of the nanoporous structure
(2) The strength is low, and the compressive strength of the product is generally only 1.0-1.3MPa
(3) The manufacturing cost is too high, and it can only be used for special equipment and projects with special requirements, and its real scale market has not yet formed
(4) Low strength and poor toughness, it cannot be used alone as a block material for thermal insulation projects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take tetraethyl orthosilicate (TEOS) and hydrochloric acid in a weight ratio of 1:5, add tetraethyl orthosilicate (TEOS) to hydrochloric acid, dissolve and dilute to form a liquid sol;

[0028] (2) Take by weighing 250 parts of nano-scale SiO, 10 parts of structural stabilizer; 20 parts of opacifying agent, 2 parts of talcum powder, mix and form mixed powder, then join mixed powder in the liquid sol prepared in step (1), Adding NH4OH to adjust the pH value to 6, stirring vigorously at the same time, and then standing and aging for 30 days, so that the micro-domains of the network structure are fully connected, and a gel with higher strength is obtained.

[0029] (3) The gel prepared in step (2) was repeatedly soaked and washed in water for 30 minutes to remove various soluble ions, and then soaked in ethanol at normal temperature for 5 days. Most of the water molecules in the colloid are replaced by ethanol to obtain SiO2 alcohol gel;

[0030] (4) Put the SiO2 alco...

Embodiment 2

[0032] (1) Take tetraethyl orthosilicate (TEOS) and hydrochloric acid by weight ratio of 1:7, add tetraethyl orthosilicate (TEOS) in hydrochloric acid, dissolve and dilute to form a liquid sol;

[0033] (2) Take by weighing 60 parts of nano-scale SiO, 8 parts of structural stabilizer; 12 parts of opacifying agent, 5 parts of talcum powder, mix and form mixed powder, then join mixed powder in the liquid sol prepared in step (1), Adding NH4OH to adjust the pH value to 7, stirring vigorously at the same time, and then standing and aging for 20 days, so that the micro-domains of the network structure are fully connected, and a gel with higher strength is obtained.

[0034] (3) The gel prepared in step (2) was repeatedly soaked and washed in water for 40 minutes to remove various soluble ions, and then soaked in ethanol at normal temperature for 6 days. Most of the water molecules in the colloid are replaced by ethanol to obtain SiO2 alcohol gel;

[0035] (4) SiO2 alcohol gel prep...

Embodiment 3

[0037] (1) Weigh tetraethyl orthosilicate (TEOS) and hydrochloric acid in a weight ratio of 1:10, add tetraethyl orthosilicate (TEOS) to hydrochloric acid, dissolve and dilute to form a liquid sol;

[0038] (2) Take by weighing 70 parts of nano-scale SiO, 5 parts of structural stabilizer; 5 parts of opacifying agent, 4 parts of talcum powder, mix and form mixed powder, then join mixed powder in the liquid sol prepared in step (1), Adding NH4OH to adjust the pH value to 7, stirring vigorously at the same time, and then standing and aging for 15 days, so that the micro-domains of the network structure are fully connected, and a gel with higher strength is obtained.

[0039] (3) The gel prepared in step (2) was repeatedly soaked and washed in water for 50 minutes to remove various soluble ions, and then soaked in ethanol at normal temperature for 8 days. Most of the water molecules in the colloid are replaced by ethanol to obtain SiO2 alcohol gel;

[0040](4) Put the SiO prepare...

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PUM

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Abstract

The invention relates to a non-toxic high-performance fireproof thermal insulation material and a preparation method thereof. The non-toxic high-performance fireproof thermal insulation material is prepared from the following components in parts by weight: 50 to 70 parts of nano-scale SiO2, 25 to 40 parts of liquid sol, 5 to 10 parts of a structure stabilizer, 2 to 5 parts of talcum powder and 5 to 20 parts of a light screening agent. The preparation method of the non-toxic high-performance fireproof thermal insulation material comprises the following steps: preparing the liquid sol by utilizing ethyl orthosilicate and hydrochloric acid; adding the nano-scale SiO2, the structure stabilizer and the light screening agent in the liquid sol, thus obtaining a gel body; immersing the gel body inethanol, thus obtaining SiO2 alcogel; carrying out supercritical drying, thus obtaining the non-toxic high-performance fireproof thermal insulation material. According to the non-toxic high-performance fireproof thermal insulation material disclosed by the invention, nano porous structures are uniformly distributed, are stable and are not affected by water absorptivity; stable nano porous structures are still obtained when the non-toxic high-performance fireproof thermal insulation material is used under a high-temperature environment of 1000 DEG C or more; the production cost is low, continuously large-scale production can be realized, and meanwhile, asbestos and organic matters which are harmful to human health do not exist in a production process.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation, and in particular relates to a fire-proof and thermal-insulation material with a nano-pore structure. Background technique [0002] With the development of cutting-edge national defense technology and the improvement of people's awareness of energy conservation, energy conservation has become the focus of industrial development. Thermal insulation materials are materials or materials that are widely used in building enclosures or thermal equipment to resist heat flow transfer. Composite body, which includes both thermal insulation materials and cold insulation materials. Due to its strong resistance to heat flow, thermal insulation materials can be used for thermal insulation and heat insulation of walls, roofs or industrial pipes, kilns, etc. of housing construction. On the one hand, thermal insulation materials meet the thermal environment of building space or thermal equipment, and...

Claims

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Application Information

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IPC IPC(8): C04B26/32C04B38/00C04B111/40C04B111/28
Inventor 朱德康
Owner 绵阳梨坪科技有限公司