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Laminated Mo2CTx/nitrogen-doped carbon micron-nanometer hybridized compound wave-absorbing material and preparation method thereof

A composite wave-absorbing material, nitrogen-doped carbon technology, applied in the field of wave-absorbing materials, can solve problems such as low density, achieve the effects of overcoming poor compatibility, good etching effect, and enhancing the ability to attenuate electromagnetic waves

Active Publication Date: 2019-01-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of laminated Mo 2 CT x Nitrogen-doped carbon micro-nano hybrid composite absorbing material and its preparation method, the obtained micro-nano hybrid composite absorbing material overcomes the deficiency of single-component absorbing ability, and obtains adjustable impedance matching and enhanced dielectric Electric loss, and then realize the low density, strong absorption, thin thickness, broadband absorbing performance in the frequency range of 2-18 GHz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Step 1, prepare Mo 2 CT x carrier material

[0027] Measure 12 mL of 1.0 mol / L etchant aqueous solution in the polytetrafluoroethylene reactor, weigh the Mo of the MAX phase 2 GaC precursor 1.0 g, under the condition of magnetic stirring speed of 100 r / min at room temperature, the Mo 2 GaC precursor slowly added NH within 2.0 min 4 HF 2aqueous solution, the reaction kettle was sealed, and the stirring time continued for 5 h. Deionized water was added to the obtained product, and centrifuged at 3500 rpm for 5 min each time. During the last centrifugation, the pH of the supernatant was around 7.0. Subsequently, absolute ethanol was added, centrifuged twice under the same conditions, and dried in a vacuum oven at 60 °C.

[0028] Step 2, prepare Mo 2 CT x / PANI hybrid composite material

[0029] At room temperature, the Mo prepared in step 1 2 CT x Weigh 0.2 g in 40 mL of deionized water and disperse ultrasonically for 0.5 h. After being uniformly dispersed, th...

example 2

[0034] Step 1, prepare Mo 2 CT x carrier material

[0035] Measure 24 mL of 1.0 mol / L etchant aqueous solution in the polytetrafluoroethylene reactor, weigh the Mo of the MAX phase 2 GaC precursor 1.0 g, under the condition of magnetic stirring speed of 200 r / min at room temperature, the Mo 2 GaC precursor slowly added NH within 4.0 min 4 HF 2 aqueous solution, the reaction kettle was sealed, and the stirring time continued for 5 h. Deionized water was added to the obtained product, and centrifuged at 3500 rpm for 5 min each time. During the last centrifugation, the pH of the supernatant was around 7.0. Subsequently, absolute ethanol was added, centrifuged twice under the same conditions, and dried in a vacuum oven at 60 °C.

[0036] Step 2, prepare Mo 2 CT x / PANI hybrid composite material

[0037] At room temperature, the Mo prepared in step (1) 2 CT x Weigh 0.3 g in 50 mL of deionized water and disperse ultrasonically for 0.75 h. After being uniformly dispersed...

example 3

[0042] Step 1, prepare Mo 2 CT x carrier material

[0043] Measure 36 mL of 1.0 mol / L etchant aqueous solution in the polytetrafluoroethylene reactor, weigh the Mo of the MAX phase 2 GaC precursor 2.0 g, under the condition of magnetic stirring speed of 300 r / min at room temperature, the Mo 2 GaC precursor slowly added NH within 6.0 min 4 HF 2 aqueous solution, the reaction kettle was sealed, and the stirring time continued for 7 h. Deionized water was added to the obtained product, and centrifuged at 3500 rpm for 5 min each time. During the last centrifugation, the pH of the supernatant was around 7.0. Subsequently, absolute ethanol was added, centrifuged twice under the same conditions, and dried in a vacuum oven at 60 °C.

[0044] Step 2, prepare Mo 2 CT x / PANI hybrid composite material

[0045] At room temperature, the Mo prepared in step 1 2 CT x Weigh 0.4 g in 60 mL of deionized water and disperse ultrasonically for 1.0 h. After being uniformly dispersed, t...

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Abstract

The invention discloses a laminated Mo2CTx / nitrogen-doped carbon micron-nanometer hybridized compound wave-absorbing material and a preparation method thereof. According to the micron-nanometer hybridized compound wave-absorbing material, laminated Mo2CTx is taken as a carrier, and the surface of laminated Mo2CTx and the space among layers of laminated Mo2CTx are loaded with a nitrogen-doped carbon nanomaterial. Graphene-similar two-dimensional laminated Mo2CTx is taken as a carrier of the wave-absorbing material for the first time, and meanwhile, the nitrogen-doped carbon nanomaterial prepared through the pyrolysis of a conducting polymer is compounded with Mo2CTx for the first time so as to prepare the micron-nanometer hybridized compound wave-absorbing material, so that the deficiency that a single component is insufficient in wave-absorbing capacity is overcome, adjustable impedance matching and increased dielectric loss are realized, and the low-density, strong-absorptivity, low-thickness and wide-broadband wave-absorbing property is realized in a frequency range of 2GHz-18GHz.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a laminated Mo 2 CT x Nitrogen-doped carbon micro-nano hybrid composite absorbing material and preparation method thereof. Background technique [0002] After entering the 21st century of information explosion, the vigorous development of electronic information technology has made electromagnetic waves widely used in many fields, and the resulting electromagnetic radiation pollution and interference problems are attracting more and more attention. Absorbing materials help to purify and improve the current electromagnetic environment, so the development of efficient absorbing materials is an important research topic in the military and civilian fields. An ideal absorbing material needs to have the characteristics of thin, light, wide, and strong absorption performance, and at the same time, it needs to meet the multi-functional characteristics of strong stabilit...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 何曼周钰明仝远廖强王瑞丽
Owner SOUTHEAST UNIV
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