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

A kind of carbon airgel and preparation method thereof

A carbon aerogel, resorcinol technology, applied in aerogel preparation, chemical instruments and methods, colloid chemistry, etc. irregularities etc.

Active Publication Date: 2021-01-29
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing methods for preparing carbon aerogels mainly focus on the high-temperature carbonization method, and the organic precursor is heated and carbonized in a high-temperature furnace under the protection of an inert gas or under vacuum conditions to obtain a carbon aerogel material; but the above-mentioned The carbon airgel prepared by the preparation method has an irregular pore structure, which seriously restricts the adsorption and filtration characteristics of the carbon airgel material

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 carbon airgel and preparation method thereof
  • A kind of carbon airgel and preparation method thereof
  • A kind of carbon airgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] In order to solve the problem that the current preparation method of carbon aerogel has relatively large damage to the microstructure of the carbon aerogel material, thereby restricting the adsorption and filtration characteristics of the prepared carbon aerogel material, the present invention provides a carbon aerogel The preparation method, by preparing the resorcinol-formaldehyde gel system, the resorcinol-formaldehyde gel system is frozen to obtain the resorcinol-formaldehyde gel system, and then the resorcinol-formaldehyde gel system is frozen The gel system is placed in a graphite mold, sintered in a discharge plasma sintering furnace under vacuum conditions, and cooled to obtain the carbon airgel. The carbon airgel prepared by the invention has a pore structure, and the pore structure has a continuous gradient, so that the pore structure of the carbon airgel prepared by the invention is regular and orderly, thereby improving the adsorption and filtration character...

Embodiment 1

[0055] This embodiment provides a method for preparing carbon aerogel, which specifically includes the following steps:

[0056] S1: Dissolve 2g resorcinol and 8ml formaldehyde in 20ml distilled water, adjust the pH value to 7 to obtain a mixed solution;

[0057] S2: Add 0.04 g of sodium carbonate to the mixed solution, stir and react at room temperature for 1 h to obtain a resorcinol-formaldehyde solution;

[0058] S3: standing the resorcinol-formaldehyde solution at 50°C for 2 hours, and then standing at 80°C for 2 hours to form a resorcinol-formaldehyde gel system;

[0059] S4: freezing the resorcinol-formaldehyde gel system at -120°C for 1 hour to form a resorcinol-formaldehyde gel system;

[0060] S5: Vacuum-dry the resorcinol-formaldehyde jelly system at -40°C for 4 hours, and then vacuum-dry it at 150°C for 2 hours to obtain a dried resorcinol-formaldehyde jelly system;

[0061] S6: Put the dried resorcinol-formaldehyde jelly system into a graphite mold, put the graph...

Embodiment 2

[0067] Different from Example 1, the preparation method of carbon aerogel in this example includes the following steps:

[0068] S1: Dissolve 6g of resorcinol and 12ml of formaldehyde in 60ml of distilled water, and adjust the pH value to 9 to obtain a mixed solution;

[0069] S2: Add 0.7g of sodium carbonate to the mixed solution, stir and react at room temperature for 1.5h to obtain a resorcinol-formaldehyde solution;

[0070] S3: standing the resorcinol-formaldehyde solution at 50°C for 3 hours, and then standing at 80°C for 3 hours to form a resorcinol-formaldehyde gel system;

[0071] S4: freezing the resorcinol-formaldehyde gel system at -150°C for 1.5 hours to form a resorcinol-formaldehyde gel system;

[0072] S5: Vacuum-dry the resorcinol-formaldehyde jelly system at -80°C for 5 hours, and then vacuum-dry it at 180°C for 4 hours to obtain a dried resorcinol-formaldehyde jelly system;

[0073] S6: Put the dried resorcinol-formaldehyde jelly system into a graphite mol...

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 discloses a carbon aerogel and a preparation method thereof, and relates to the field of carbon material preparation. The preparation method of the carbon aerogel comprises: dissolving resorcinol and formaldehyde in water, reacting under the condition of an alkaline catalyst, Form a resorcinol-formaldehyde solution; leave the resorcinol-formaldehyde solution to form a resorcinol-formaldehyde gel system; place the resorcinol-formaldehyde gel system at -120°C Freeze at ‑170°C to form a resorcinol‑formaldehyde jelly system; vacuum-dry the resorcinol‑formaldehyde jelly system and place it in a graphite mold; put the graphite mold into a discharge plasma After being sintered in a bulk sintering furnace under vacuum conditions, the carbon airgel is obtained by cooling. The preparation method of the carbon airgel provided by the present invention has less damage to the microstructure of the pores in the carbon airgel material during the preparation process, and the prepared carbon airgel material has a pore structure, and the pore structure is distributed in a continuous gradient state .

Description

technical field [0001] The invention relates to the field of carbon material preparation, in particular to a carbon airgel and a preparation method thereof. Background technique [0002] Due to its low density, high specific surface area, continuous pore structure, and good high temperature resistance and corrosion resistance, carbon aerogels have broad application prospects in the fields of adsorption and catalysis, and their potential application value has aroused great interest among researchers. big interest. At present, the existing methods for preparing carbon aerogels mainly focus on the high-temperature carbonization method, and the organic precursor is heated and carbonized in a high-temperature furnace under the protection of an inert gas or under vacuum conditions to obtain a carbon aerogel material; but the above-mentioned The carbon airgel prepared by the preparation method has an irregular pore structure, which seriously restricts the adsorption and filtration...

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): B01J13/00B01J20/20B01J20/30
CPCB01J13/0091B01J20/20
Inventor 张海礁刘鑫博颜彤宇吴岩孙俭峰周长海周波黄耀群
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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