Efficient thermal-insulation aerogel composite plate and preparation method thereof

A composite sheet and airgel technology, applied in the field of heat insulation materials, can solve problems such as large loss of fiber strength, difficulty in holding pressure, and heat insulation effect that cannot meet the requirements of use, and achieves easy implementation, scientific and reasonable preparation methods, and good performance. The effect of heat insulation effect

Active Publication Date: 2015-04-08
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two methods have their own advantages and disadvantages. The former matrix sol and fibers can be fully mixed, and the fluidity is good, but it is difficult to add pressure, and the fiber strength is greatly lost during the preparation process; The strength los

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] (1) Measure 5 moles of ethyl orthosilicate and 50 moles of alcohol respectively, put them in a large plastic box, stir with an electric stirrer for 30 minutes to fully mix the ethyl orthosilicate and alcohol, and then measure 20 moles Slowly add the distilled water in the mixed solution, adjust the pH of the solution to 3 with hydrochloric acid, and continue to stir for 30 minutes to prepare a sol;

[0038] (2) The fiber mat is shaped into a flat plate; the density of the fiber mat used is 0.08g / cm 3 , The average fiber diameter is 2μm.

[0039] (3) The prepared sol is siphoned into the shaped fiber mat through a vacuum, and the pH of the sol is adjusted to 6 with ammonia water to make it gel; the total volume of the aerogel is twice the volume of the fiber mat;

[0040] (4) Add 4.5 liters of alcohol and put it in an oven at 50℃ to age for 2 days;

[0041] (5) Put the gel-aged fiber felt into an autoclave for supercritical drying, the drying medium is ethanol,...

Example Embodiment

[0044] Example 2

[0045] (1) Measure 5 moles of ethyl orthosilicate and 40 moles of alcohol respectively, put them in a large plastic box, stir with an electric stirrer for 30 minutes to fully mix the ethyl orthosilicate and alcohol, and then measure 20 moles Slowly add the distilled water in the mixed solution to the mixed solution, adjust the pH of the solution to 3.5 with hydrochloric acid, and continue to stir for 30 minutes to prepare a sol;

[0046] (2) The fiber mat is shaped into a flat plate; the density of the fiber mat used is 0.10g / cm 3 , The average fiber diameter is 1μm.

[0047] (3) The prepared sol is siphoned into the shaped fiber mat through a vacuum, and the pH of the sol is adjusted to 6.5 with ammonia water to make it gel; the total volume of the aerogel is 2.5 times the volume of the fiber mat;

[0048] (4) Add 4 liters of alcohol and put it in an oven at 60°C for aging for 1 day;

[0049] (5) Put the gel-aged fiber felt into an autoclave for supercritical drying...

Example Embodiment

[0052] Example 3

[0053] (1) Measure 5 moles of ethyl orthosilicate and 20 moles of alcohol respectively, put them in a large plastic box, stir with an electric stirrer for 30 minutes to fully mix the ethyl orthosilicate with alcohol, and then measure 20 moles Slowly add the distilled water in the mixed solution to the mixed solution, adjust the pH of the solution to 4 with hydrochloric acid, and continue to stir for 30 minutes to prepare a sol;

[0054] (2) The fiber mat is shaped into a flat plate; the density of the fiber mat used is 0.12g / cm 3 , The average fiber diameter is 3μm;

[0055] (3) The prepared sol is siphoned into the fiber mat through a vacuum, and the pH of the sol is adjusted to 7 with ammonia water to make it gel; the total volume of the aerogel is 3 times the volume of the fiber mat;

[0056] (4) Add 3 liters of alcohol and put it in an oven at 55℃ to age for 3 days;

[0057] (5) Put the gel-aged fiber felt into an autoclave for supercritical drying, the drying me...

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
Densityaaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of thermal-insulation materials and particularly relates to an efficient thermal-insulation aerogel composite plate and a preparation method thereof. The aerogel composite plate is prepared from a thermal-insulation material matrix and aerogel, wherein the thermal-insulation material matrix is a fiber mat of which the density is 0.09-0.12g/cm<3>, and the diameter of the fiber is 1-3mu m; the aerogel is prepared from tetraethylortho silicate, alcohol and distilled water at a molar ratio of 1: (4-10): (2-6); and the total volume of the aerogel is 1.5-3 times of the volume of the fiber mat. The aerogel composite plate has the characteristics of high efficiency and thermal insulation; and the preparation method is simple in process and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of heat-insulating materials, and in particular relates to a high-efficiency heat-insulating airgel composite plate and a preparation method thereof. Background technique [0002] With the acceleration of the flight speed of the aircraft, the flight altitude until it enters orbit, and the long time of passing through the atmosphere, the temperature it bears is higher, and the aerodynamic heating is more demanding. It is necessary to develop new high-efficiency heat insulation materials with high temperature resistance. Therefore, how to prepare a high-efficiency thermal insulation material has become the key to thermal insulation technology. [0003] Due to its special microstructure such as three-dimensional nanoparticle framework, high specific surface area, nanoscale pores, and low density, airgel can effectively inhibit solid-state heat conduction and gas convective heat transfer, and has excellent therm...

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
IPC IPC(8): C04B30/02
Inventor 李勇隋学叶刘瑞祥周长灵王重海杨杰魏美玲
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap