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Preparation method of MXene-CNT/carbon aerogel composite material

A technology of composite materials and carbon airgel, which is applied in shielding materials, electrical components, magnetic field/electric field shielding, etc., can solve the problems of poor electromagnetic shielding performance, high reflection ratio, high filler content of composite materials, etc., and achieve low production cost, Strong absorption, simple and feasible preparation method

Pending Publication Date: 2021-11-12
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of MXene-CNT / carbon airgel composite material, which solves the problems of high filler content, poor electromagnetic shielding performance and high reflection ratio of the composite material in the prior art

Method used

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  • Preparation method of MXene-CNT/carbon aerogel composite material
  • Preparation method of MXene-CNT/carbon aerogel composite material
  • Preparation method of MXene-CNT/carbon aerogel composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A kind of preparation method of MXene-CNT / carbon airgel composite material of the present invention, specifically implement according to the following steps:

[0047] Step 1, Etching Ti by LiF-HCl 3 AlC 2 (MAX phase) precursor to prepare few-layer MXene powder, the specific steps are as follows:

[0048] Step 1.1, fully mix 2gLiF with 40ml 9mol / L HCl, then slowly add 2gMAX phase precursor powder under ice bath conditions;

[0049] Step 1.2, the above mixture was stirred at 35°C for 24 hours to obtain Ti 3 C 2 T x The suspension was repeatedly washed with deionized water until the pH was 7, and centrifuged at a speed of 3500r / min;

[0050] Step 1.3, the Ti 3 C 2 T x The precipitate was dispersed in 100ml of deionized water, ultrasonically treated for 15min to promote the stratification of multi-layer MXene, and then centrifuged at a rate of 3500r / min for 15min, repeated several times, and the supernatant was taken to obtain the MXene dispersion;

[0051] In step...

Embodiment 2

[0060] A kind of preparation method of MXene-CNT / carbon airgel composite material of the present invention, specifically implement according to the following steps:

[0061] Step 1, Etching Ti by LiF-HCl 3 AlC 2 (MAX phase) precursor to prepare few-layer MXene powder, the specific steps are as follows:

[0062] Step 1.1, fully mix 2gLiF with 40ml 9mol / L HCl, then slowly add 2gMAX phase precursor powder under ice bath conditions;

[0063] Step 1.2, the above mixture was stirred at 35°C for 24 hours to obtain Ti 3 C 2 T x The suspension was repeatedly washed with deionized water until the pH was 7, and centrifuged at a speed of 3500r / min;

[0064] Step 1.3, the Ti 3 C 2 T x The precipitate was dispersed in 100ml of deionized water, ultrasonically treated for 15min to promote the stratification of multi-layer MXene, and then centrifuged at a rate of 3500r / min for 15min, repeated several times, and the supernatant was taken to obtain the MXene dispersion;

[0065] In step...

Embodiment 3

[0074] A kind of preparation method of MXene-CNT / carbon airgel composite material of the present invention, specifically implement according to the following steps:

[0075] Step 1, Etching Ti by LiF-HCl 3 AlC 2 (MAX phase) precursor to prepare few-layer MXene powder, the specific steps are as follows:

[0076] Step 1.1, fully mix 2gLiF with 40ml 9mol / L HCl, then slowly add 2gMAX phase precursor powder under ice bath conditions;

[0077] Step 1.2, the above mixture was stirred at 35°C for 24 hours to obtain Ti 3 C 2 T x The suspension was repeatedly washed with deionized water until the pH was 7, and centrifuged at a speed of 3500r / min;

[0078] Step 1.3, the Ti 3 C 2 T xThe precipitate was dispersed in 100ml of deionized water, ultrasonically treated for 15min to promote the stratification of multi-layer MXene, and then centrifuged at a rate of 3500r / min for 15min, repeated several times, and the supernatant was taken to obtain the MXene dispersion;

[0079] In step ...

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Abstract

The invention discloses a preparation method of an MXene-CNT / carbon aerogel composite material, which specifically comprises the following steps: firstly, etching an MAX phase precursor through LiF-HCl to prepare a few-layer MXene powder; preparing MXene-CNT / cellulose aerogel by using few layers of MXene powder and CNT powder; and finally, putting the MXene-CNT / cellulose aerogel into a tubular furnace, and carrying out carbonization so as to obtain the MXene-CNT / carbon aerogel composite material. According to the composite material prepared by the method, the unique design of the three-dimensional structure enables electromagnetic waves to enter more easily, incident waves are attenuated through multiple times of reflection and scattering in the porous structure, and the attenuation of the incident waves is further promoted through the synergistic effect between MXene and CNT, so that excellent electromagnetic shielding performance is obtained; and the application requirements in the fields of aerospace, electronic packaging and the like can be met.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of MXene-CNT / carbon airgel composite material. Background technique [0002] With the rapid development of a new generation of technology represented by 5G, the electromagnetic wave pollution brought by it has become a serious threat to human health and the normal operation of precision electronic devices. Therefore, it is of great significance to design and prepare high-performance electromagnetic interference (EMI) shielding materials with strong absorption mechanism to solve this problem. [0003] In order to reduce the secondary pollution caused by the reflection of electromagnetic waves on the surface of materials, constructing a porous three-dimensional structure has been proved to be a key strategy to optimize the impedance matching between materials and air. In recent years, biomass carbon-based materials have been ...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0073
Inventor 任鹏刚宗泽郭铮铮任芳
Owner XIAN UNIV OF TECH
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