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High-efficiency fireproof heat insulating material and preparation method thereof

A thermal insulation material and high-efficiency technology, applied in the field of thermal insulation, can solve the problems of low strength, high manufacturing cost, poor toughness, etc., and achieve the effect of low thermal conductivity and low production cost

Inactive Publication Date: 2010-08-18
无锡市明江保温材料有限公司
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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) Weigh nano-scale SiO 2 50 parts, 10 parts of structural stabilizer; 20 parts of opacifying agent, mix to form mixed powder, then add mixed powder to the liquid sol prepared in step (1), add NH 4 OH to adjust the pH value to 6, while vigorously stirring, 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 SiO 2 alcohol gel;

[0030] (4) SiO prepared in step (3) 2 Put the alcohol gel into a high-pressur...

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) Weigh nano-scale SiO 2 60 parts, 8 parts of structural stabilizer; 12 parts of opacifying agent, mix to form mixed powder, then join mixed powder in the liquid sol prepared in step (1), add NH 4 OH to adjust the pH value to 7, while vigorously stirring, 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 SiO 2 alcohol gel;

[0035] (4) SiO prepared in step (3) 2 Put the alcohol gel into a high-pressure ...

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) Weigh nano-scale SiO 2 70 parts, 5 parts of structural stabilizer; 5 parts of opacifying agent, mixed to form a mixed powder, then the mixed powder was added to the liquid sol prepared in step (1), and NH 4 OH to adjust the pH value to 7, while vigorously stirring, 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 SiO 2 alcohol gel;

[0040] (4) SiO prepared in step (3) 2 Alcohol gel is placed in a...

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Abstract

The invention relates to a fireproof heat insulating material with a nano-pore structure. The high-efficiency fireproof heat insulating material comprises the following components in proportion by weight: 50-70 parts of nano-SiO2, 25-40 parts of lyosol, 5-10 parts of structural stabilizer and 5-20 parts of opacifier. The preparation method of the high-efficiency fireproof heat insulating material comprises the following steps: preparing the lyosol by utilizing tetraethoxysilane(TEOS) and hydrochloric acid; adding the nano-SiO2, the structural stabilizer and the opacifier to the lyosol to obtain gel; soaking in ethanol to obtain SiO2 alcogel; and obtaining the high-efficiency fireproof heat insulating material by supercritical drying. The fireproof heat insulating material of the invention has uniform and stable nano-pore structure distribution, is not affected by whether water is absorbed or not, still has the stable nano-pore structure when being used in a high-temperature environment of more than 1000 DEG C, has low production cost, can realize continuous large-scale production, and simultaneously does not have asbestos and organic matters, which are harmful to the human health, during the 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): C04B32/00
Inventor 周明刚
Owner 无锡市明江保温材料有限公司
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