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Glass fiber reinforced silicon dioxide aerogel composite material and preparation method thereof

A glass fiber and silica technology is applied in the field of preparing glass fiber reinforced silica aerogel composite materials, which can solve the problem that the material properties need to be further optimized, and achieve the effects of avoiding excessive volume shrinkage, strengthening strength, and being convenient to operate.

Active Publication Date: 2011-02-16
ZHONGKE RUNZI (CHONGQING) ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is one of the methods developed in recent years to prepare aerogels through normal pressure drying. The cost of raw materials used is low, and the process is relatively simple, which is conducive to industrial production; however, the properties of materials prepared by this method need to be further optimized.

Method used

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  • Glass fiber reinforced silicon dioxide aerogel composite material and preparation method thereof
  • Glass fiber reinforced silicon dioxide aerogel composite material and preparation method thereof
  • Glass fiber reinforced silicon dioxide aerogel composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] First, take 0.05g of glass fiber and heat-treat it at 110°C for 30 minutes, then add it into the mixed solution of KH-550 coupling agent and an appropriate amount of absolute ethanol, stir for 3 hours, dry it at 120°C and take it out for use. The dosage is 0.2% of the fiber mass. Take ethyl orthosilicate, methyltriethoxysilane, absolute ethanol, water, and hydrochloric acid alcohol solution in volumes of 5.5ml, 2ml, 10ml, 2.5ml, and 0.4ml for mixed reaction, and add silanized Glass fiber, keep stirring and add ammonia water alcohol solution after 4h, adjust pH ≈ 8.0, wait for gel. The composite wet gel was immersed in absolute ethanol and aged at 55°C for 1 day. After aging, the wet gel was immersed in a mixed surface modifier solution containing 4ml TMCS, 4ml absolute ethanol, and 36ml n-hexane, and modified at 35°C. After 2 days of resistance, the composite wet gel was taken out and cleaned, and often pressed and dried to obtain a glass fiber reinforced silica compos...

Embodiment 2

[0036] First, take 0.1g of glass fiber and heat-treat it at 110°C for 30 minutes, then add it into the mixed solution of KH-550 coupling agent and an appropriate amount of absolute ethanol, stir for 3 hours, dry it at 120°C and take it out for use. The dosage is 0.5% of the fiber mass. Take ethyl orthosilicate, methyltriethoxysilane, absolute ethanol, water, and hydrochloric acid alcohol solution in volumes of 5.5ml, 2ml, 12ml, 3ml, and 0.5ml for mixed reaction, and add silanized glass after 8 hours Fiber, after 4h, add ammonia water alcohol solution, adjust pH ≈ 8.0, and wait for gelation. Then the composite wet gel was immersed in absolute ethanol and aged at 55°C for 1 day. After aging, the wet gel was immersed in a mixed surface modifier solution containing 4ml TMCS, 4ml absolute ethanol, and 32ml n-hexane at 35°C. After 2 days of modification, the wet gel was taken out, washed with n-hexane, and dried under constant pressure to obtain a glass fiber reinforced silica comp...

Embodiment 3

[0038] First, take 0.1g of glass fiber and heat-treat it at 110°C for 30 minutes, then add it into the mixed solution of KH-550 coupling agent and an appropriate amount of absolute ethanol, stir for 3 hours, dry it at 120°C and take it out for use. The dosage is 0.2% of the fiber mass. Take ethyl orthosilicate, methyltrimethoxysilane, absolute ethanol, water, and hydrochloric acid alcohol solution in volumes of 5.5ml, 2ml, 12.5ml, 3ml, and 0.4ml for mixed reaction, and add the treated glass fiber after 8 hours , Stir, and after 4h, add ammonia water alcohol solution, adjust the pH ≈ 8.3, and wait for the gel. Then the composite wet gel was immersed in absolute ethanol and aged at 50°C for 2 days. After aging, the wet gel was immersed in a mixed surface modifier solution containing 4ml TMCS, 4ml absolute ethanol, and 40ml n-hexane at 35°C. After 2.5 days of modification, the wet gel was taken out, washed with n-hexane to remove the modifier remaining on the surface, and dried ...

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Abstract

The invention relates to an aerogel composite material, in particular to a glass fiber reinforced silicon dioxide aerogel composite material and a preparation method thereof. The excellent properties of aerogel are maintained, the mechanical properties of the aerogel are reinforced, and the glass fiber reinforced silicon dioxide aerogel composite material has good integrity and certain strength. The glass fiber reinforced silicon dioxide aerogel composite material is prepared by compounding glass fiber and silicon dioxide aerogel, wherein the glass fiber is a reinforcement, and the content ofthe glass fiber accounts for 1-15% total mass of a sample; the silicon dioxide aerogel is a matrix, tetraethoxysilane is a silicon source material, and methyltrimethoxysilane or methyltriethoxysilaneis used as a silicon source co-precursor. The preparation method comprises the following steps of: firstly, pretreating the glass fiber; then, preparing glass fiber reinforced silicon dioxide composite wet gel; and finally, aging, secondarily modifying and drying the silicon dioxide composite wet gel.

Description

technical field [0001] The invention relates to an airgel composite material, in particular to a method for preparing a glass fiber reinforced silica airgel composite material based on fiber pretreatment and sol-gel technology and dried under normal pressure. Background technique [0002] Silica airgel is a highly dispersed nanoporous amorphous lightweight material with a spatial network structure formed by the aggregation of nanoscale particles. The material has a high specific surface area (500 ~ 1500m 2 / g), high porosity (80% ~ 99.8%), low density (0.03 ~ 0.3g / cm 3 ), low refractive index (1~11), low thermal conductivity (~0.01W·m -1 ·K -1 ), low dielectric constant (1.0 ~ 2.0) and other superior properties, and the performance can be continuously adjustable with the control of the structure. And other fields have broad application prospects, and have been used as heat insulation materials, catalysts and carriers, acoustic impedance coupling materials, Cherenkov dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/42C04B28/24
CPCC04B14/42C04B30/02C04B20/1051C04B20/006
Inventor 程璇吴国友罗凤钻高尧余煜玺张颖
Owner ZHONGKE RUNZI (CHONGQING) ENERGY SAVING TECH CO LTD
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