Unlock instant, AI-driven research and patent intelligence for your innovation.

a kind of sio 2 The preparation method of -c-n composite airgel material

A composite airgel, sio2-c-n technology, applied in the field of preparation of composite airgel materials, can solve the problems that micron-sized pores are difficult to use in the field of heat insulation, and the strength of airgel is low, and meets the requirements of experimental equipment conditions. High, low cost of raw materials, simple preparation method

Inactive Publication Date: 2016-11-30
TONGJI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN 103304252A discloses a SiO 2 Airgel / Porous Si 3 N 4 The preparation method of composite materials, this patent is to solve the problem of porous Si 3 N 4 Micron-scale pores are difficult to use in the field of thermal insulation and pure SiO 2 The problem that the airgel strength is too low to be applied directly

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 sio <sub>2</sub> The preparation method of -c-n composite airgel material
  • a kind of sio <sub>2</sub> The preparation method of -c-n composite airgel material
  • a kind of sio <sub>2</sub> The preparation method of -c-n composite airgel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A SiO 2 -The preparation method of C-N composite airgel material, comprises the following steps:

[0036] 1) Preparation of chitosan-tetraethyl orthosilicate sol-gel: first take 0.1g chitosan and acetic acid solution, the mass ratio of chitosan and acetic acid is 1:0.33, under room temperature, magnetic stirring 24h, marked as solution A; take a 100mL beaker, dissolve 7.9g of citric acid monohydrate in 17mL of absolute ethanol, add 6mL of 1mol / L HNO 3 , sonicate to dissolve the mixed solution completely, and mark it as solution B; under the action of magnetic stirring, add solution A dropwise into solution B, and then add 12mL tetraethyl orthosilicate dropwise; Leave it in the mouth for 3-5 days to make it gel.

[0037] 2)SiO2 2 - Preparation of C-N composite airgel: the mixed gel was dried in an oven at 80°C for 48h. Take the dried gel in a porcelain boat, place it in a quartz tube set in a tube furnace, and pass N 2 10min to expel the air in it. in N 2 Under at...

Embodiment 2

[0044] A SiO 2 -The preparation method of C-N composite airgel material, comprises the following steps:

[0045] (1) The preparation of chitosan-tetraethyl orthosilicate sol-gel comprises the following steps:

[0046] (11) Get chitosan and be dissolved in acetic acid solution, under room temperature condition, magnetic stirring makes solution mix;

[0047] (12) Dissolve citric acid monohydrate in absolute ethanol, add a certain volume of 1mol / L HNO 3 , adjust the pH of the solution to be less than 1, and ultrasonically dissolve the mixed solution completely;

[0048] (13) under the action of magnetic stirring, add the solution obtained in step (11) dropwise to the solution obtained in step (12), and then add tetraethyl orthosilicate dropwise;

[0049] (14) Place the mixed sol obtained in step (13) in the open for 4 days to obtain chitosan-tetraethyl orthosilicate gel.

[0050] The weight ratio of chitosan and citric acid monohydrate is 1:79, the mass ratio of chitosan and ...

Embodiment 3

[0059] A SiO 2 -The preparation method of C-N composite airgel material, comprises the following steps:

[0060] (1) The preparation of chitosan-tetraethyl orthosilicate sol-gel comprises the following steps:

[0061] (11) Get chitosan and be dissolved in acetic acid solution, under room temperature condition, magnetic stirring makes solution mix;

[0062] (12) Dissolve citric acid monohydrate in absolute ethanol, add a certain volume of 1mol / L HNO 3 , adjust the pH of the solution to be less than 1, and ultrasonically dissolve the mixed solution completely;

[0063] (13) under the action of magnetic stirring, add the solution obtained in step (11) dropwise to the solution obtained in step (12), and then add tetraethyl orthosilicate dropwise;

[0064] (14) the mixed sol of step (13) gained was left open for 3 days to obtain chitosan-tetraethyl orthosilicate gel.

[0065] The mass ratio of chitosan and citric acid monohydrate is 0.5:79, the mass ratio of chitosan and acetic...

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
compressive strengthaaaaaaaaaa
thermal conductivityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a SiO2-C-N composite aerogel material and belongs to the field of preparation of composite aerogel materials. The method comprises the following steps: (1) preparing chitosan-tetraethoxysilane sol-gel; (2) preparing SiO2-C-N composite aerogel; and (3) activating the SiO2-C-N composite aerogel. Compared with the prior art, the preparation method is simple and the cost is relatively low; and the composite aerogel has the hydrophily of SiO2 and the hydrophobicity of carbon, and also has the advantages of mesoporous materials.

Description

technical field [0001] The invention relates to a preparation method of a composite airgel material, in particular to a SiO 2 -The preparation method of C-N composite airgel material. Background technique [0002] As the global environmental pollution is becoming more and more serious, environmental problems are getting more and more attention. In recent years, the search for new adsorbent materials has gradually become a research hotspot, and various new adsorbent materials have attracted great attention from the majority of scientific researchers. [0003] Inorganic oxides and carbon mesoporous materials have the characteristics of nanostructure, porous structure, and internal and external modification, so they exhibit multiple physical and chemical properties that are difficult to achieve with general materials. If they are used for the treatment of harmful substances in the environment, then It is expected to achieve better results than conventional methods. [0004] ...

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): B01J13/00B01J20/24B01J20/30
Inventor 吴庆生戴晓晓
Owner TONGJI UNIV