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
CN108383487BActive Publication Date: 2021-03-02SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2021-03-02

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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