Thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite and preparation method thereof

A technology of glass fiber mat and silica, which is applied in the field of airgel composite material preparation, can solve the problems of relatively high cost, difficult strength, and high airgel strength, and achieve good product performance stability, process safety and controllability, The effect of excellent comprehensive performance

Inactive Publication Date: 2015-12-30
四川中蓝基业新材料科技有限公司
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Problems solved by technology

[0006] Chinese patent CN1592651A provides a method for preparing an airgel thermal insulation composite material. The airgel composite material prepared by this process has good performance and relatively high cost. The supercritical drying process is mainly used, which has certain risks in industrial production. Not conducive to large-scale industrial production
[0007] Chinese patent CN103342537A provides a method for preparing high-temperature-resistant alumina airgel materials. The airgel prepared by this process has high strength and large blocks, showing a great market development prospect, but because supercritical equipm

Method used

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  • Thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite and preparation method thereof

Examples

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Example Embodiment

[0033] Example 1

[0034] The starting material for the insulating silica aerogel / hydroxylated glass fiber mat composite is made from the following components:

[0035] Silica aerogel as matrix, 50 parts

[0036] 70 parts of hydroxylated glass fiber mat as reinforcement.

[0037] The preparation method of adiabatic silica aerogel composite material comprises the following steps:

[0038] 1) Deionized water, absolute ethanol, and hexamethyldisiloxane are calculated by mass: 18:230:0.8, at a temperature of 30 ° C, after adding 0.1 part of hydrolysis catalyst hydrochloric acid having a molar concentration of 0.5mol / L, Add 208 parts of ethyl orthosilicate dropwise and react for 0.5h to control the M group in the sol system to be (CH3)3SiO 1 / 2 , the Q group is SiO 4 / 2 , the molar ratio of M and Q structure is 1:30, and after fully stirring for 2h, a silica sol system with MQ structure is prepared;

[0039] 2) Hydroxylate the glass fiber mat, soak the glass fiber mat in an acet...

Example Embodiment

[0044] Example 2

[0045] The starting material for the insulating silica aerogel / hydroxylated glass fiber mat composite is made from the following components:

[0046] Silica aerogel as matrix, 80 parts

[0047] 120 parts of hydroxylated glass fiber mat as reinforcement.

[0048] The preparation method of adiabatic silica aerogel composite material comprises the following steps:

[0049] 1) Deionized water, absolute ethanol and hexamethyldisiloxane are calculated by mass: 36:460:2.4, at a temperature of 78 ° C, adding 0.3 part of hydrolysis catalyst hydrochloric acid hydrofluoric acid whose molar concentration is 1mol / L Then, 208 parts of ethyl orthosilicate were added dropwise, and the reaction was carried out for 2 h to control the M group in the sol system to be (CH3)3SiO 1 / 2 , the Q group is SiO 4 / 2 , the molar ratio of M and Q structure is 1:100, and after fully stirring for 10h, a silica sol system with MQ structure is prepared;

[0050] 2) Hydroxylate the glass fibe...

Example Embodiment

[0055] Example 3

[0056] The starting material for the insulating silica aerogel / hydroxylated glass fiber mat composite is made from the following components:

[0057] Silica aerogel as matrix, 65 parts

[0058] 100 parts of hydroxylated glass fiber mat as reinforcement.

[0059] The preparation method of adiabatic silica aerogel composite material comprises the following steps:

[0060] 1) Deionized water, absolute ethanol, and hexamethyldisiloxane are calculated by mass: 28:400:1.5, at a temperature of 55 ° C, after adding 0.2 part of hydrolysis catalyst hydrochloric acid having a molar concentration of 0.75mol / L, Add 208 parts of ethyl orthosilicate dropwise, and react for 1h to control the M group in the sol system to be (CH3)3SiO 1 / 2 , the Q group is SiO 4 / 2 , the molar ratio of M and Q structure is 1:70, and after fully stirring for 5h, a silica sol system with MQ structure is prepared;

[0061] 2) Hydroxylate the glass fiber mat, soak the glass fiber mat in an ace...

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Abstract

The invention discloses a thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite and a preparation method thereof. The thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite is characterized in that silicon dioxide aerogel accounts for 50-80 weight parts of a matrix, and hydroxylation glass fiber felt accounts for 70-120 weight parts of a reinforcing body. The thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite is prepared by preparing a silica sol system of an MQ structure (M represents (CH3)3SiO1/2, Q represents SiO4/2) through raw materials including absolute ethyl alcohol, deionized water, hexamethyldisiloxane and the like under the acid catalysis environment, then adding gel catalysts, submerging preprocessed glass fiber in the silica sol system to form a wet gel and fiber felt composite, conducting soaking through normal hexane after ageing is conducted for 12-24 h so that water in the system can be removed, and conducting drying to obtain the silicon dioxide aerogel/hydroxylation glass fiber felt composite at temperature of 50-120 DEG C and pressure of 0.01-5 Pa for 1-5 h.

Description

technical field [0001] The invention relates to a thermal insulation silica airgel / hydroxylated glass fiber mat composite material and a preparation method thereof, belonging to the technical field of airgel composite material preparation. technical background [0002] Silica airgel is an ultra-light porous material with high specific surface area, low density and three-dimensional nanoporous structure. It has unique optical, acoustic, electrical and thermal properties. It is used in aviation, aerospace, metallurgy, petrochemical and The field of energy-saving building materials has broad application prospects. [0003] At present, domestic and foreign scholars and enterprises have conducted extensive research on the preparation and application of aerogels. Silicon dioxide aerogels can be formed by using organic silicon as a silicon source, using a melting-gel process, and drying. However, due to the extremely low density (about 1 / 6 to 1 / 3 of the air density), the specific ...

Claims

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Application Information

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IPC IPC(8): C04B30/02
Inventor 侯仁义张灼燃产小华李逢政
Owner 四川中蓝基业新材料科技有限公司
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