A kind of pan preoxygenated fiber felt/silica airgel composite material and preparation method thereof

A composite material, silica technology, applied in the field of thermal insulation materials, can solve the problems of low aerogel strength, low thermal conductivity, easy to break, etc., achieve excellent thermal insulation performance, high toughness, improve high temperature thermal insulation performance Effect

Active Publication Date: 2021-03-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In insulation materials.SiO 2 The unique nanoporous structure and skeleton particles of aerogel make it the solid material with the lowest thermal conductivity at normal temperature and pressure, and has great potential applications in aerospace vehicle heat insulation tiles, thermal insulation of thermal piping systems, and transparent thermal insulation layers value, but since the SiO 2 Airgel has low strength, poor toughness, and is brittle and cannot be used alone. Therefore, SiO 2 The composite material prepared by combining airgel with fiber and felt is SiO 2 The main products of airgel in the field of thermal insulation

Method used

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  • A kind of pan preoxygenated fiber felt/silica airgel composite material and preparation method thereof
  • A kind of pan preoxygenated fiber felt/silica airgel composite material and preparation method thereof
  • A kind of pan preoxygenated fiber felt/silica airgel composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The specifications and parameters of the airgel composite material and PAN pre-oxidized fiber felt are shown in Table 4, and the formula is shown in Table 5.

[0067] Table 4

[0068]

[0069] table 5

[0070]

[0071] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The preparation method of airgel composite material, according to the formula of above table 4, table 5, it comprises the steps of following order:

[0072] 1) Pretreatment of PAN pre-oxidized fiber felt: Soak the PAN pre-oxidized fiber felt in a surfactant solvent, perform ultrasonic treatment at 50 Hz for 20 minutes, wash with water, and dry at 120 to obtain a clean PAN pre-oxidized fiber felt ;

[0073] 2) Hydrolysis of silicon source: under constant temperature conditions, add silicon source, first auxiliary agent, sunscreen agent, chemical drying control additive, acid catalyst in sequence, stir at 400r / min for...

Embodiment 2

[0081] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The specifications and parameters of the airgel composite material and PAN pre-oxidized fiber felt are shown in Table 6, and the formula is shown in Table 7.

[0082] Table 6

[0083]

[0084] Table 7

[0085]

[0086]

[0087] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The preparation method of airgel composite material, according to the formula of above table 4, table 5, it comprises the steps of following order:

[0088] 1) Pretreatment of PAN pre-oxidized fiber felt: Soak the PAN pre-oxidized fiber felt in a surfactant solvent, perform ultrasonic treatment at 50 Hz for 20 minutes, wash with water, and dry at 120 to obtain a clean PAN pre-oxidized fiber felt ;

[0089] 2) Hydrolysis of silicon source: under constant temperature conditions, add silicon source, first auxiliary agent, sunscreen agent, chemical drying control additive, acid catalyst in sequence, stir at ...

Embodiment 3

[0097] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The specifications and parameters of the airgel composite material and PAN pre-oxidized fiber felt are shown in Table 8, and the formula is shown in Table 9.

[0098] Table 8

[0099]

[0100] Table 9

[0101]

[0102] The PAN pre-oxidized fiber felt / SiO provided by this embodiment 2 The preparation method of airgel composite material, according to the formula of above table 4, table 5, it comprises the steps of following order:

[0103] 1) Pretreatment of PAN pre-oxidized fiber felt: Soak the PAN pre-oxidized fiber felt in a surfactant solvent, perform ultrasonic treatment at 50 Hz for 20 minutes, wash with water, and dry at 120 to obtain a clean PAN pre-oxidized fiber felt ;

[0104] 2) Hydrolysis of silicon source: under constant temperature conditions, add silicon source, first auxiliary agent, sunscreen agent, chemical drying control additive, acid catalyst in sequence, stir at 400r / min for...

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Abstract

The invention discloses a PAN pre-oxygen fiber felt / SiO 2 Aerogel composite material and preparation method thereof, the PAN pre-oxidized fiber felt / SiO 2 The aerogel composite material is composed of 100-120 parts by mass of PAN pre-oxygen fiber felt and 10-150 parts of SiO 2 The aerogel is prepared by a composite of two materials; among which SiO 2 Aerogel material is composed of silicon source, first auxiliary agent, sunscreen agent, chemical drying control additive, acid catalyst, basic catalyst, aging liquid, second auxiliary agent, surface hydrophobic modifier, and third auxiliary agent in parts by mass. The ratio is 25: (20‑80): (5‑30); (0.5‑10): (0.1‑10): (0.1‑10): (20‑80): (20‑80): (20‑ 80): (20-80) is obtained in preparation. PAN pre-oxygen fiber felt / SiO of the present invention 2 Aerogel felt has the advantages of excellent thermal insulation, stable chemical properties, superhydrophobicity, high toughness, high strength and long life. The invention can be widely used in the thermal insulation industry.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, in particular to a PAN pre-oxidized fiber felt / SiO 2 Composite materials and methods for their preparation. Background technique [0002] SiO 2 Airgel is a new type of amorphous material with low density, low thermal conductivity and high porosity. In insulation materials.SiO 2 The unique nanoporous structure and skeleton particles of aerogel make it the solid material with the lowest thermal conductivity at normal temperature and pressure, and has great potential applications in aerospace vehicle heat insulation tiles, thermal insulation of thermal piping systems, and transparent thermal insulation layers value, but since the SiO 2 Airgel has low strength, poor toughness, and is brittle and cannot be used alone. Therefore, SiO 2 The composite material prepared by combining airgel with fiber and felt is SiO 2 Airgel is the main product in the field of thermal insulation. Conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02
CPCC04B30/02C04B16/0616C04B14/064
Inventor 刘保健彭元佑刘莹杨强蔡浏阳冯田陈青殷振轩
Owner SHAANXI UNIV OF SCI & TECH
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