Nanometer silicon dioxide aerogel glass fiber light felt and preparing method thereof

A technology of nano-silica and silica, which is applied in the field of glass fiber lightweight felt and its preparation, can solve the problems of high equipment requirements, high airgel content, and insufficient flexibility, and achieve excellent sound-absorbing performance and prolong service time , the effect of flexibility reduction

Active Publication Date: 2016-03-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the mixture of phenolic resin binder and silica airgel is used, the thermal conductivity of the mixed felt is slightly increased and the maximum service temperature of the mixed felt is reduced, which limits its application in high temperature fields
[0006] As in the above two patents, the content of airgel in the silica airgel mixed felt prepared by the prior art is relatively large, and the equipment requirements are high, which greatly increases the cost. The effect of heat is not ideal, so there is an urgent need for a new hybrid felting process to prepare airgel glass fiber mats with better performance

Method used

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  • Nanometer silicon dioxide aerogel glass fiber light felt and preparing method thereof
  • Nanometer silicon dioxide aerogel glass fiber light felt and preparing method thereof
  • Nanometer silicon dioxide aerogel glass fiber light felt and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] refer to figure 1 , is a device diagram for preparing nano-silica airgel glass fiber lightweight felt, 10 is the inlet section of the Venturi tube, 20 is the contraction section, 30 is the diffusion section, 40 is the air inlet, and 50 is the conveyor belt, figure 2 It is a cross-sectional view of silica airgel lightweight sound-insulating and heat-insulating glass fiber felt, image 3 It is the surface diagram of silica airgel lightweight sound-insulating and heat-insulating glass fiber felt, and its preparation includes the following steps:

[0025] (1) Spray the glass fiber filaments from the top of the Venturi tube, the flow rate is 100 kg per hour, the glass fiber filaments fall in the Venturi tube, the length of the Venturi tube is 3 meters, and the ratio of the upper and lower apertures is 1:3;

[0026] (2) an air inlet is set at the constriction section of the Venturi tube, sprays into the silica airgel particle from the air inlet, flow rate is 0.1 kilogram pe...

Embodiment 2

[0033] refer to figure 1 , is a device diagram for preparing nano-silica airgel glass fiber lightweight felt, 10 is the inlet section of the Venturi tube, 20 is the contraction section, 30 is the diffusion section, 40 is the air inlet, and 50 is the conveyor belt, figure 2 It is a cross-sectional view of silica airgel lightweight sound-insulating and heat-insulating glass fiber felt, image 3 It is the surface diagram of silica airgel lightweight sound-insulating and heat-insulating glass fiber felt, and its preparation includes the following steps:

[0034] (1) Spray glass fiber filaments from the top of the Venturi tube, the flow rate is 300 kg per hour, the glass fiber filaments fall in the Venturi tube, the length of the Venturi tube is 5 meters, and the ratio of the upper and lower apertures is 1:5;

[0035](2) An air inlet is set at the constriction section of the Venturi tube, sprays into the silica airgel particle from the air inlet, the flow rate is 0.5 kilogram per...

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Abstract

The invention discloses nanometer silicon dioxide aerogel glass fiber light felt and a preparing method thereof. The glass fiber light felt is characterized by being formed by horizontally arranging glass fibers with silicon dioxide aerogel particles adhering to the surfaces uniformly. No glass fibers penetrate through the felt in the thickness direction. The diameter of each glass fiber is 1-4 micrometers, the length of each glass fiber is 5-30 millimeters, and the particle size of each silicon dioxide aeraogel particle is 10-100 nanometers. By means of the venturi effect, the silicon dioxide aerogel particles are adsorbed to the surfaces of the glass fibers uniformly, the thickness of a silicon dioxide aerogel adhesion layer on the surface of each glass fiber is 50-500 nanometers, the proportion of the uncovered portion of the surface of each fiber is 5-10%, the weight ratio of the silicon dioxide aerogel particles in the felt is 0.1-1%, the volume weight of the felt is 5-20 kilograms per cubic metre, the compression resilience of the felt is 20-30%, the porosity of the felt is 70-90%, and the heat conductivity coefficient of the nanometer silicon dioxide aerogel glass fiber light felt is 0.008-0.015 W / m.K.

Description

technical field [0001] The invention relates to a glass fiber lightweight felt and a preparation method thereof, in particular to a nano-silica airgel glass fiber light weight felt and a preparation method thereof. technical background [0002] In recent years, energy saving and environmental protection have become the most concerned issues. The traditional organic thermal insulation materials are flammable and corrosive, which limits their wide application in the construction field, while inorganic thermal insulation materials have disadvantages such as poor thermal insulation performance and high density. Big limitations. As another inorganic non-metallic material with excellent performance, glass fiber not only has low thermal conductivity but also has high mechanical strength. It is formed by melting and blowing inorganic glass. The shock absorption and sound absorption characteristics are conducive to reducing noise pollution and improving the working environment. It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02
Inventor 陈照峰叶信立
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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