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Preparation method of aerosil composite glass cotton fiber needled felt

A technology of glass wool fiber and silica, which is applied in the field of chemical materials, can solve the problems of ordinary glass wool felt not resistant to high temperature, polyurethane material not resistant to high temperature, and unsatisfactory thermal insulation effect, so as to reduce the comprehensive construction cost and achieve good water resistance , good thermal insulation effect

Active Publication Date: 2014-03-12
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing traditional thermal insulation materials for industrial pipelines are faced with the following problems: 1) Rock wool has poor thermal insulation, easy to absorb moisture, too thick, difficult to construct in some occasions, high thermal conductivity, and unsatisfactory thermal insulation effect; 2) Ordinary Glass wool felt is not resistant to high temperature; 3) Polyurethane material is not resistant to high temperature and is easy to burn
However, there are many defects in the above method, especially the method is only applicable to the loose amorphous fiber material as the carrier material, and the product is the amorphous airgel and fiber composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A modified silica airgel slurry, raw materials include silica airgel, modifying agent, surfactant and solvent, and the weight fraction ratio of each raw material is:

[0038] Silica airgel 4-30

[0039] Modifier 2-10

[0040] Surfactant 9-15

[0041] Solvent 40-70;

[0042] The preparation method of the modified silica airgel slurry comprises the following steps:

[0043] (1) Add the surfactant and solvent into the stirring tank, and stir at a speed of 500-800 rpm for 10-20 minutes, so that the surfactant is evenly dispersed in the solvent to obtain a mixed solution;

[0044] (2) Add the silica airgel to the mixture, and stir at a speed of 500-800 rpm for 30-60 minutes to prepare a uniformly dispersed silica airgel slurry;

[0045] (3) Add the modifying agent to the uniformly dispersed silica airgel slurry, and stir at a speed of 500-800 rpm for 20-30 minutes to obtain the modified silica Airgel paste.

[0046] The application of the modified silica airgel slurry,...

Embodiment 2

[0054] This example is a preferred scheme based on Example 1, the quality of the raw materials (components) used is the same as that of Example 1, and the weight fraction ratio of each raw material in the silica airgel slurry is:

[0055] Silica Airgel 25

[0056] Silane coupling agent KH560 8

[0057] Tween 80 8

[0058] deionized water 59;

[0059]After the raw material ratio of the modified silica airgel slurry is selected, the preparation method of the modified silica airgel slurry comprises the following steps:

[0060] (1) Add Tween 80 as a surfactant and deionized water as a solvent into the stirring tank, and stir at a speed of 500 rpm for 10 minutes, so that the surfactant is evenly dispersed in the solvent;

[0061] (2) Add the silica airgel to the stirred surfactant and solvent mixture, and stir at a speed of 600 rpm for 45 minutes to prepare a uniformly dispersed silica airgel slurry ;

[0062] (3) Add silane coupling agent KH560 as a modifier to the uniformly...

Embodiment 3

[0066] This example is a preferred scheme based on Example 1, the quality of the raw materials (components) used is the same as that of Example 1, and the weight fraction ratio of each raw material in the silica airgel slurry is:

[0067] Silica Airgel 20

[0068] Silane coupling agent KH570 5

[0069] Tween 80 10

[0070] Deionized water 60.

[0071] Refer to Example 2 for the preparation method of the modified silica airgel slurry and the preparation method of the silica airgel composite glass wool fiber needle felt.

[0072] In order to detect the performance of the silica airgel modified glass wool fiber needle felt for external heat preservation described in this example, the thermal conductivity and hydrophobicity were measured respectively, wherein the thermal conductivity was detected according to the provisions of GB / T 10294 , the hydrophobic rate is tested according to the method specified in GB / T 10299, the thermal conductivity is 0.018 W / (m K), and the hydrophob...

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PUM

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Abstract

The invention provides a preparation method of an aerosil composite glass cotton fiber needled felt. The method mainly utilizes compounding of modified aerosil slurry and a glass cotton fiber needled felt; raw materials of the modified aerosil slurry comprise aerosil, a modifier, a surfactant and a solvent. According to the invention, the aerosil and the glass cotton fiber needled felt with fireproof performance are compounded, so that the heat conductivity coefficient of the glass cotton fiber needled felt can be greatly reduced, meanwhile, the high-temperature resistance and the waterproofness are improved, the use thickness of the glass cotton fiber needled felt under the same requirements is reduced and the glass cotton fiber needled felt is convenient to construct, and thus, construction efficiency of workers is improved and the cost of comprehensive construction is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a method for preparing a silica airgel composite glass wool fiber needle-punched felt. Background technique [0002] At present, the existing traditional thermal insulation materials for industrial pipelines are faced with the following problems: 1) Rock wool has poor thermal insulation, easy to absorb moisture, too thick, difficult to construct in some occasions, high thermal conductivity, and unsatisfactory thermal insulation effect; 2) Ordinary Glass wool felt is not resistant to high temperature; 3) Polyurethane material is not resistant to high temperature and is easy to burn. [0003] Silica airgel is a nanoporous lightweight inorganic material with extremely low solid-state heat conduction, as well as gaseous heat conduction. Its thermal conductivity at normal temperature and pressure is only 0.011W / (m K), which is the best thermal insulation perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/24C04B14/42
Inventor 路国忠周红刘月闫晶郑学松
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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