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

A kind of pure water system prepares silicon airgel and production method

A silicon aerogel and system technology, which is applied in the fields of silicon aerogel and preparation, preparation of flexible hydrophobic silicon aerogel by pure water system and production, can solve the problem of poor hydrophobicity of silicon aerogel materials and thermal insulation of buildings. The material has no advantages and the thermal insulation performance is general, so as to achieve the effect of good thermal insulation performance, low production cost and good water repellency

Active Publication Date: 2019-12-10
JILIN JIANZHU UNIVERSITY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method greatly reduces the preparation of SiO 2 The cost of nanoporous materials reduces the difficulty and danger of the operation process, but the hydrophobicity of silicon airgel materials is not good, and the thermal conductivity is too high, resulting in general thermal insulation performance, which has no advantages in application as building insulation materials

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

Embodiment 1

[0017] 1) Dissolve 0.3 grams of cetyltrimethylammonium bromide and 4ml of 15mg / ml graphene oxide solution in 30ml of deionized water, then add 6 grams of acidic silica sol, 12 grams of methyl triethoxysilane, in Stir in a water bath at 50°C for 0.5h, then add diluted ammonia water dropwise to adjust the pH to 6-7, let it stand for a period of time, the solution gradually gels, put the gel in an oven at 50°C for sealing and aging for 24h, and then dry at 70°C After 24 hours, the hydrophilic silica airgel was obtained.

[0018] 2) Put the prepared hydrophilic silicon aerogel into the reaction kettle, then add 8-15 grams of trimethylchlorosilane, and carry out gas-solid reaction at 70-90°C for 3-6 hours after airtight. Silica airgel is modified to obtain flexible and hydrophobic silicon airgel.

Embodiment 2

[0020] 1) Dissolve 0.3 grams of cetyltrimethylammonium bromide and 4 grams of 15 mg / ml graphene oxide solution in 30 ml of deionized water, then add 6 grams of acidic silica sol, 20 methyl triethoxysilane gram, stirred in a water bath at 50°C for 0.5h, then added dropwise dilute ammonia water to adjust the pH to 6-7, left to stand for a period of time, the solution gradually gelled, put the gel in an oven at 50°C for sealing and aging for 24h, and then Dry at 70°C for 24 hours to obtain hydrophilic silica airgel.

[0021] 2) Same as the steps in example 1 2)

Embodiment 3

[0023] 1) Dissolve 0.3 g of cetyltrimethylammonium bromide and 4 g of 15 mg / ml graphene oxide solution in 30 ml of deionized water, then add 10 g of acidic silica sol, 12 methyl triethoxysilane gram, stirred in a water bath at 50°C for 0.5h, then added dropwise dilute ammonia water to adjust the pH to 6-7, left to stand for a period of time, the solution gradually gelled, put the gel in an oven at 50°C for sealing and aging for 24h, and then Dry at 70°C for 24 hours to obtain hydrophilic silica airgel.

[0024] 2) Same as step 2 of example 1)

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
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to flexible hydrophobic silica aerogel prepared via a purified water system and a production method thereof; the production method comprises: adding acidic silica sol, methyltriethoxysilane, little cetyltrimethylammonium bromide, graphene oxide and other materials into the purified water system, stirring at 50 DEG C for a period of time, adding dilute ammonia water to adjust ph, gelling, ageing, and drying; adding the hydrophilic silica aerogel into a reactor, adding trimethylchlorosilane, sealing, and allowing gas-solid reaction at 70-90 DEG C to obtain the flexible hydrophobic silica aerogel. The production method has is performed in the purified water system such that the reaction is safe and convenient, the production cost is low, and industrial production is available; in addition, by modifying with trimethylchlorosilane through gas-solid reaction, the silica aerogel has the advantages of hydrophobicity, low density, low heat conductivity and the like.

Description

technical field [0001] The invention relates to silicon airgel and a preparation method thereof, in particular to a pure water system for preparing flexible hydrophobic silicon airgel and a production method thereof, belonging to the technical field of building heat insulation material production. Background technique [0002] Silicon dioxide (SiO 2 ) Airgel is a new type of lightweight porous material formed by the aggregation of nano-sized particles and using air as the dispersion medium. It is mainly used as thermal insulation materials and sound-absorbing materials. Airgel prepared with high-purity silicon alkoxide (tetraethyl silicate, etc.) as a silicon source has excellent performance in all aspects, but the cost is expensive, and it is not suitable for popularization in civil fields such as building insulation. Some researchers used water glass as the silicon source, and added N,N-dimethylformamide as the drying control agent (DCCA) to reduce the shrinkage during th...

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): C04B28/24C04B38/00C04B41/49
CPCC04B28/24C04B41/009C04B41/4905C04B2201/20C04B2201/32C04B2201/50C04B24/42C04B24/121C04B14/024C04B22/06C04B38/0038C04B41/4539
Inventor 赵洪凯许亚军肖力光陈健王猛
Owner JILIN JIANZHU UNIVERSITY
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