A kind of preparation method of airgel fiber composite material
A fiber composite material and aerogel technology, which is applied in the field of preparation of aerogel fiber composite materials, can solve the problems of complex process, high safety and high risk, expensive construction and operation costs, etc., and achieves improved mechanical strength and good mechanical properties. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0022] The invention provides a kind of preparation method of airgel fiber composite material, comprises the following steps:
[0023] a) forming after mixing the raw materials to obtain an airgel cellulose blank; the raw materials include airgel or its precursor, and fibers;
[0024] b) Calcining the airgel cellulose blank to obtain an airgel fiber composite material; the temperature of the calcination is 300-1000°C.
[0025] In the present invention, the raw materials are mixed first. Wherein, the raw material includes airgel or its precursor, and fiber. The airgel includes, but is not limited to, one or more of silica aerogel, alumina aerogel, titania aerogel, zirconia aerogel and boron nitride aerogel. The airgel is preferably airgel particles, and the particle diameter of the airgel particles is preferably ≤5mm. In the present invention, the airgel precursor is a stock solution or sol for preparing airgel. Taking silica airgel as an example, its precursor can be an et...
Embodiment 1
[0050] Preparation of airgel fiberboard
[0051] 1) Preparation of biscuit: add 3kg RCF fiber, 2kg E fiber, 82kg silica airgel granules (particle size ≤ 5mm), 13kg zircon powder into a dry mixer for mixing, and mix the air The gel fiber is put into the forming mold in a fluffy state, and after compression, degassing and pressure keeping, the high aerogel fiber board green body is made.
[0052] 2) Calcination: Apply a layer of 1-2mm thick 1260°C high-temperature paint on the surface of the green body, and after natural drying, perform calcination. The calcination system is as follows:
[0053] Room temperature to 300°C: heating rate 20°C / min;
[0054] 300°C: keep warm for 5 minutes;
[0055] 300°C to 600°C: heating rate 30°C / min;
[0056] 600°C: keep warm for 10 minutes;
[0057] 600°C to 900°C: heating rate 40°C / min;
[0058] 900°C: keep warm for 5 minutes;
[0059] After the calcination is completed, an airgel fiber board is obtained.
[0060] 3) Testing: Perform perf...
Embodiment 2
[0062] Preparation of airgel fiber blanket
[0063] 1), prepare green body: according to silica airgel and RCF fiber mass ratio is 15:85, the precursor of silica airgel (orthosilicic acid containing trimethylsilane) is evenly sprayed in the cotton collector Ethanol hydrolysis solution of tetraethyl ester), co-sedimentation with RCF fibers in the cotton collector to make fluffy fiber mats containing airgel precursors, interweaving fibers with each other by double-sided needle punching machine to make airgel-containing Fiber blanket green body of glue precursor.
[0064] 2), calcining the fiber blanket green body, the calcination system is as follows:
[0065] Room temperature to 300°C: heating rate 30°C / min;
[0066] 300°C: keep warm for 10 minutes;
[0067] 300°C to 500°C: Heating rate 40°C / min;
[0068] 500°C: keep warm for 15 minutes;
[0069] After calcination, the airgel fiber blanket is obtained.
[0070] 3), testing: performance testing of the prepared airgel fiber...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thermal resistance | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| flexural strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More