Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of silicon carbide aerogel thermal insulation material

A thermal insulation and aerogel technology, applied in the direction of silicon carbide, carbide, etc., can solve the problem of excessive thermal conductivity growth, and achieve the effects of small shrinkage, low density and low price

Inactive Publication Date: 2021-05-25
LIAONING JINGU CARBON MATERIALS CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional carbon fiber thermal insulation materials have the advantages of light weight, low thermal conductivity and good mechanical properties, but the thermal conductivity will increase too fast at high temperatures, which limits its application in 1000°C and higher temperature scenarios

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of silicon carbide aerogel thermal insulation material
  • Preparation method of silicon carbide aerogel thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First add 1000 mesh graphite powder and 800 mesh silicon carbide powder to the silica sol with a content of 20%-25%, the ratio of the three parts by mass is 1.0: 3.0: 40, mix well to form a sol, and then mix the sol Pour the solution into a mold equipped with polyacrylonitrile-based carbon fiber material, so that the liquid surface of the sol is just submerged in the polyacrylonitrile-based carbon fiber material, and let it stand for 10-30 minutes to gel; then add a certain amount of ethanol solvent as an aging solution. Replace the excess water in the gel, the aging temperature is 35-80°C, the aging standing time is 12-72 hours, and the alcohol gel is obtained; after supercritical drying, the drying pressure is 10-25MPa, and the drying temperature is 80-100 After ℃, the silicon carbide airgel reinforced fiber material is obtained;

[0026] 2) if figure 1 or figure 2 As shown, the silicon carbide airgel reinforced fiber material layer 3 in step 1) is combined with fo...

Embodiment 2

[0028] Mix graphite powder, silicon carbide powder, and silica sol evenly according to the mass fraction ratio of 0.5:0.6:20, pour it into a mold equipped with polyacrylonitrile-based carbon fiber felt, make the sol liquid level just submerge the carbon fiber felt, and let it stand for 20 minutes To obtain the gel material, use ethanol solvent as the aging solution to replace the excess water in the gel, seal it and age it at 55°C for 14 hours to obtain an alcohol gel, and dry it supercritically at 18MPa and 85°C to obtain silicon carbide aerosol Glue reinforced polyacrylonitrile based fiber material. like figure 1 As shown, the silicon carbide airgel reinforced fiber 3 is multi-layer compounded, and the two surfaces are bonded with 1.0mm thick carbon paper 1 and 0.5mm thick carbon fiber cloth 2, which are bonded with epoxy resin adhesive layer 4 in turn. At the same time, the silicon carbide airgel insulation board insulation material is obtained after high temperature treat...

Embodiment 3

[0030] Mix graphite powder, silicon carbide powder, and silica sol evenly according to the mass fraction ratio of 0.8:1.2:35, pour it into a mold equipped with viscose-based carbon fiber felt, make the sol liquid level just submerge the carbon fiber felt, and stand for 25 minutes to obtain Gel material, using ethanol solvent as the aging solution to replace the excess water in the gel, after sealing, aging at 35°C for 48 hours to obtain alcohol gel, and supercritical drying at 20MPa and 65°C to obtain silicon carbide airgel Reinforced viscose based fiber material. like figure 1 As shown, the silicon carbide airgel reinforced fiber 3 is multi-layered, and the two surfaces are bonded with 0.8mm thick carbon paper 1 and 1.0mm thick carbon fiber cloth 2, and then bonded together with phenolic resin adhesive 4, After high temperature treatment at 1600°C, the silicon carbide airgel insulation board insulation material is obtained.

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of a silicon carbide aerogel thermal insulation material, and belongs to the technical field of thermal insulation materials. The preparation method of the silicon carbide aerogel thermal insulation material comprises preparation of a silicon carbide aerogel reinforced fiber material and an integral compounding process of the material. The preparation method comprises the steps of soaking a carbon fiber material in silica sol dissolved with silicon carbide, gelling, aging and drying to obtain a silicon carbide aerogel reinforced fiber material, and carrying out composite molding on the reinforced material to obtain the aerogel thermal insulation material. By applying the silicon carbide aerogel to the carbon fiber thermal insulation material, the carbon fiber thermal insulation material has the advantages of large specific surface area, low heat conductivity coefficient, small density and the like, and the preparation method is simple and easy for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, in particular to a preparation method of a silicon carbide airgel thermal insulation material. [0002] technical background [0003] Airgel is a solid material with a nanoporous network structure composed of nanoparticles aggregated with each other. It has excellent properties such as ultra-low density, ultra-high specific surface area, ultra-high porosity, and low thermal conductivity. The porosity of the airgel material is more than 90%, and the mesoporous structure inside the airgel material can make the airgel have excellent heat insulation performance, which can make the airgel in battery energy, industrial high temperature furnace and aerospace and other fields have been widely applied. Airgel is currently one of the most potential thermal insulation materials, but its low density and high porosity lead to low strength, high brittleness and poor mechanical properties. ...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02C04B14/32C01B32/956C04B111/40
CPCC04B30/02C04B14/324C01B32/956C04B2111/40C04B2201/32C04B2201/20C04B14/386
Inventor 邢阳阳孙琦李波刘东影
Owner LIAONING JINGU CARBON MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com