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

A kind of preparation method of airgel composite material

A composite material and aerogel technology, applied in the field of composite materials, can solve the problems of inability to integrally form large-thickness products, limited thickness of aerogel composite materials, poor adjustability of aerogel thickness, etc. Layers or cracks, thickness can be adjusted, the effect of improving thermal insulation performance

Active Publication Date: 2021-06-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN102050456B proposes a molding method of silica airgel thermal insulation composite material, including the design of silica sol injection molding tooling, silica sol formula and preparation method, and the mixing method of silica sol and reinforcing materials As well as the supercritical drying process for strengthening the silica gel body, the silica airgel thermal insulation composite material obtained by the method provided by the present invention has a density not greater than 0.4g / cm3, a bending strength not less than 1.0MPa, and a compressive strength ( 10% compression) is not less than 0.2MPa, and the thermal conductivity (600°C) is not more than 0.04W / m K, but the thickness of the airgel prepared by this method is small, the thickness of the airgel is poorly adjustable, and the density is uniform bad sex
However, due to the limitations of the sol-gel impregnation method in the general method, the thickness of the airgel composite material is limited, and it is impossible to form a large-thickness product as a whole. Therefore, a new sol-gel preparation method is needed to prepare airgel composites with large thickness and adjustable, no internal delamination, no cracks, and good density uniformity

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
  • A kind of preparation method of airgel composite material
  • A kind of preparation method of airgel composite material
  • A kind of preparation method of airgel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Preparation of an airgel composite material with a thickness of 500mm*500mm*30mm

[0043] Preparation:

[0044] (1) Forming tooling design: design the airgel forming tooling according to the product size, set 5 glue discharge ports on the upper and lower molds of the forming tooling, and design a glue inlet around the middle frame of the forming tooling;

[0045] (2) Fiber matrix mold closing: put the quartz fiber matrix with a thickness of 30mm into the forming mold to ensure that the forming mold is well airtight;

[0046] (3) Dipping molding: connect the pipeline, start pre-vacuuming, after the vacuuming time is 15 minutes, import the prepared glue into the glue injection tank, and start vacuum glue injection, the glue injection time is 5 minutes, and the vacuum injection time is 5 minutes. The amount of glue is 3000L; after that, the second vacuuming is started, the vacuum time is 5min, and the soaking time is 5min; after that, the pressure injection of ...

Embodiment 7

[0053] The preparation method and process of this embodiment are basically the same as in Example 1, except that in the dipping molding process, there is only one pressure application process and pressure holding process, and the dipping molding process is as follows:

[0054] Connect the pipeline and start pre-vacuuming. After the vacuuming time is 15 minutes, import the prepared glue into the glue injection tank, and start vacuum glue injection. The glue injection time is 5 minutes, and the glue discharge volume during vacuum injection is 3000L; after that Start the second vacuuming, the vacuum time is 5min, and the impregnation time is 5min; then start the pressure injection of 0.1MPa, the pressure holding time is 5min, the first discharge volume is 7500L, and finally the wet gel is obtained.

experiment example

[0067] This experimental example is a performance comparison between the airgel composite materials prepared in Examples 1-7 and the airgel composite materials prepared in Comparative Examples 1 and 2. The results are shown in Table 2.

[0068] Table 2:

[0069]

[0070]

[0071] As can be seen from the above experimental results, compared with Comparative Example 1-2, the airgel composite material prepared in Example 1-7 has higher density, higher temperature resistance and greater compressive strength, and its internal density uniformity is good. No delamination and / or cracking occurred. However, both comparative example 1 and comparative example 2 are directly vacuum injected without pressure injection process, and their performance in all aspects is poor, and because of the vacuum injection of comparative example 1 has a certain amount of glue discharge, the internal density uniformity is poor , a small amount of delamination and / or cracks appeared, and the uniformi...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
densityaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of composite materials, and discloses a preparation method of an airgel composite material, which includes forming tooling design, fiber matrix mold clamping, dipping molding, aging, solvent replacement and drying, and the dipping molding is sequentially using vacuum glue injection , Pressure injection to impregnate the sol in the fiber matrix until the sol-gel reaction occurs. The present invention also proposes an airgel composite material prepared by the above preparation method with large thickness and adjustable, no delamination, no cracks in internal quality, and good density uniformity. The preparation method of the invention significantly improves the heat insulation performance of the large-thickness airgel composite material, and can be used for internal and external heat insulation in the field of aerospace when operating in a high-temperature environment for a long time. In addition, this method can prepare special-shaped components with different surface specifications, which has guiding significance for the integrated molding of internal and external heat protection of various aircraft.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of an airgel composite material. Background technique [0002] Airgel composite materials have excellent characteristics such as thinness and lightness, strong compression resistance, low thermal conductivity, fire prevention and moisture resistance, and environmental protection. With excellent results. At present, there are many methods for forming fiber-reinforced airgel composites, and they are relatively mature. Patent No. CN102050456B proposes a molding method of silica airgel thermal insulation composite material, including the design of silica sol injection molding tooling, silica sol formula and preparation method, and the mixing method of silica sol and reinforcing materials As well as the supercritical drying process for strengthening the silica gel body, the silica airgel thermal insulation composite material obtained by t...

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 Patents(China)
IPC IPC(8): C04B30/02
CPCC04B30/02C04B2201/20C04B2201/50C04B14/42C04B2103/0068C04B14/4656
Inventor 张丽娟裴雨辰李文静苏力军简文政宋寒赵英民杨洁颖
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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