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Electromagnetic wave absorbing material prepared on the basis of MXene waste precipitate as well as preparation method and application of electromagnetic wave absorbing material

A technology for absorbing materials and electromagnetic waves, applied in electrical components, antennas, etc., to improve the degree of impedance matching, the method is simple, and the interface is increased.

Pending Publication Date: 2022-01-07
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with MXene materials, MXene waste precipitated absorbing materials have the advantages of low cost and simple preparation process. The waste precipitates generated after stripping MXene nanosheets can be reused, but there is no research on the preparation of absorbing materials based on MXene waste precipitates. material report

Method used

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  • Electromagnetic wave absorbing material prepared on the basis of MXene waste precipitate as well as preparation method and application of electromagnetic wave absorbing material
  • Electromagnetic wave absorbing material prepared on the basis of MXene waste precipitate as well as preparation method and application of electromagnetic wave absorbing material
  • Electromagnetic wave absorbing material prepared on the basis of MXene waste precipitate as well as preparation method and application of electromagnetic wave absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method of preparing the absorbing material prepared based on MXENE discarded precipitation is as follows:

[0031] Step 1, add the max to the etching to give MXENE. In the present invention, MAX is selected from Ti 3 ALC 2 , Ti 2 ALC, NB 2 One or several of ALC, preferably Ti 3 ALC 2 . The etching method refers to the existing report, according to the following:

[0032] (1) Preparation of the etchant: The etch is selected from one of the HF or LiF / HCl composite solvent, preferably an etchant is a LiF / HCl composite solvent. First configure 9 m hydrochloric acid solution, 2 gliF was added to a hydrochloric acid solution and stirred at 300 rpm Rapids, i.e., LIF / HCl etch.

[0033] (2) Weigh 2GTi 3 ALC 2 The powder was slowly added to the LIF / HCl etch, and at 40 ° C at 40 ° C for 48 h at a rate of 300 rpm, the suspension was obtained.

[0034] Step 2, transfer the suspension after etching to the centrifuge tube, repeatedly washed and centrifuged with deionized water...

Embodiment 2

[0038] In this Example 2, the absorbing material prepared based on MXEN-based discarded precipitate in Example 1 was mixed with paraffin, and then poured into the mold after stirring, pressed into the mold 3mm outer diameter of 7mm in different thicknesses. The KEYSIGHTPNA-E5227B vector network analyzer is used to test its remedies and electromagnetic wave absorption performance.

[0039] The test results are respectively figure 2 , image 3 As shown, MXene discarded precipitation has an appropriate table of electrical constant and imaginary value. When the thickness is 8 mm, the reflection loss can reach -44.7 dB.

Embodiment 3

[0041] In this Example 2, the absorbing material prepared based on MXENE discarded precipitation in Example 1 was mixed with paraffin, and then poured into the mold after mixing, and pressed into a different thickness of 3mm outer diameter 7mm hollow ring.The KEYSIGHTPNA-E5227B vector network analyzer is used to test its remedies and electromagnetic wave absorption performance.

[0042] The test results are respectively Figure 4 , Figure 5 As shown, MXene discarded precipitation has an appropriate table of electrical constant and imaginary value.When the thickness is 4 mm, the reflection loss can reach -43.8 dB.

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PUM

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Abstract

The invention discloses an electromagnetic wave absorbing material prepared on the basis of MXene waste precipitates as well as a preparation method and application of the electromagnetic wave absorbing material, and belongs to the technical field of nano materials and electromagnetic wave absorbing materials. The invention provides an electromagnetic wave absorbing material obtained on the basis of MXene waste precipitates, which is obtained by taking the MXene waste precipitates left after MXene is prepared by MAX phase etching as raw materials, collecting, drying and carbonizing. The carbonization treatment comprises the steps of putting the dried MXene waste precipitates into a crucible, putting the crucible into a tubular furnace, and carbonizing for 1-5 hours at the temperature of 400-1000 DEG C in an N2 atmosphere so as to obtain the electromagnetic wave absorbing material. The invention also provides a preparation method and application of the electromagnetic wave absorbing material. The method disclosed by the invention is simple, secondary utilization is performed on the MXene waste precipitate, and the wave-absorbing performance and the wave-absorbing bandwidth of the wave-absorbing material are effectively improved.

Description

Technical field [0001] The present invention belongs to the nanomaterial and electromagnetic wave absorbing material. The technical field of electromagnetic wave, and is, according to the field of electromagnetic wave absorbing materials prepared based on MXENE waste precipitation and its preparation method and application. Background technique [0002] Electromagnetic waves have been widely used in the fields of radar, advanced detectors, and precision weapons, thereby also producing electromagnetic pollution, electromagnetic interference, electromagnetic leaks and other tricky problems. The development of high-efficiency absorbing materials is of great significance to environmental protection and human health and ensure information security. In recent years, various new electromagnetic wave absorbing materials have been developed to counter electromagnetic wave radiation and interference. MXENE is a two-dimensional selection of early transition metal carbides, nitride or carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 万艳君王晓允廖思远朱朋莉胡友根孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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