Preparation method of carbon/silicon dioxide aerogel material with efficient electromagnetic wave absorption performance

An absorption performance, silicon dioxide technology, applied in the preparation/purification of carbon, chemical instruments and methods, electrical components, etc., can solve the problems of high electrical conductivity, material consumption, etc., achieve excellent absorption performance, reduce material density, and high efficiency Effect of electromagnetic wave absorption performance

Pending Publication Date: 2022-07-22
内蒙古海特华材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing carbon aerogels reflect electromagnetic waves on the surface due to their high electrical conductivity and cannot enter the interior of the material to be consumed, and then provide a carbon / silica aerogel with high-efficiency electromagnetic wave absorption performance Material preparation method

Method used

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  • Preparation method of carbon/silicon dioxide aerogel material with efficient electromagnetic wave absorption performance
  • Preparation method of carbon/silicon dioxide aerogel material with efficient electromagnetic wave absorption performance
  • Preparation method of carbon/silicon dioxide aerogel material with efficient electromagnetic wave absorption performance

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specific Embodiment approach 1

[0023] Embodiment 1: This embodiment is a preparation method of a carbon / silica aerogel material with efficient electromagnetic wave absorption performance, which is carried out according to the following steps:

[0024] 1. Preparation of organic aerogel precursors:

[0025] Dissolving organic monomers, cross-linking agents and initiators in ultrapure water, vacuuming to remove air bubbles, then solidifying, pre-freezing after solidification, and finally freeze-drying to obtain organic aerogel precursors;

[0026] The mass ratio of the organic monomer to the crosslinking agent is (15-40): 1; the mass ratio of the organic monomer to the initiator is (5-30): 1; The mass ratio of ultrapure water is (0.01~0.5):1;

[0027] 2. Annealing:

[0028] Under the condition of inert gas, the organic aerogel precursor is heated from room temperature to 500℃~1000℃ at a heating rate of 2℃ / min~5℃ / min, and the temperature is 500℃~1000℃ under inert gas Under the condition of annealing for 0.5h...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the organic monomer described in step 1 is acrylic acid or methacrylamide. Others are the same as the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the crosslinking agent described in step 1 is N,N-methylenebisacrylamide. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a carbon / silicon dioxide aerogel material, in particular to a preparation method of a carbon / silicon dioxide aerogel material with efficient electromagnetic wave absorption performance. The invention aims to solve the problem that electromagnetic waves are reflected on the surface and cannot enter the interior of a material to be consumed due to over-high conductivity of the existing carbon aerogel. The preparation method comprises the following steps: 1, preparing an organic aerogel precursor; 2, annealing; and 3, modifying. The preparation method is used for preparing the carbon / silicon dioxide aerogel material with efficient electromagnetic wave absorption performance.

Description

technical field [0001] The present invention relates to a preparation method of carbon / silica aerogel material. Background technique [0002] With the rapid development of modern technology, electromagnetic wave pollution has become a more and more serious problem. It not only interferes with the operation stability of electronic equipment, but also brings immeasurable harm to the environment and human health. Therefore, in order to eliminate the threat of harmful electromagnetic waves to equipment and human health, the research on electromagnetic wave absorbing materials has attracted considerable attention. [0003] Aerogel material is a nanoporous material with a three-dimensional network structure composed of nanoparticles or polymer macromolecular chains. At the same time, it also has excellent properties such as low thermal conductivity, low dielectric constant, and high specific surface area, and has broad applications in heat insulation, adsorption, sound insulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B33/158B01J13/00H05K9/00
CPCC01B32/05C01B33/148B01J13/0091H05K9/0081
Inventor 王志江
Owner 内蒙古海特华材科技有限公司
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