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Preparation method of efficient composite wave-absorbing material ZIF-67atCNTs

A ZIF-67, composite wave absorbing material technology, applied in chemical instruments and methods, metal material coating technology, carbon compounds, etc., can solve the problems of poor corrosion resistance, high density of metal particles, limiting the application of high-performance aircraft, etc. achieve the effect of reducing the density of the material

Active Publication Date: 2020-12-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional absorbing materials are mainly metal particles, but metal particles have high density and poor corrosion resistance, which limits their application in high-performance aircraft

Method used

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  • Preparation method of efficient composite wave-absorbing material ZIF-67atCNTs
  • Preparation method of efficient composite wave-absorbing material ZIF-67atCNTs
  • Preparation method of efficient composite wave-absorbing material ZIF-67atCNTs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 A preparation method of high-efficiency composite wave-absorbing material ZIF-67@CNTs-1

[0023] (1) Preparation of ZIF-67;

[0024] 0.6g PVP, 1.8g (CoNO 3 ) 2 ·6H 2 O, 40mL methanol ultrasonic stirring 60min is recorded as solution 1 (PVP: 0.015g / ml methanol; PVP: (CoNO 3 ) 2 ·6H 2 O=1:3); 2.4g DMI was dissolved in 40ml methanol (DMI: 0.06g / ml methanol), ultrasonically stirred for 60min and recorded as solution 2, 40ml solution 2 was added dropwise to solution 1, and after mechanical stirring for 4h, Stand at room temperature for 48h, wash with ethanol / water solution, and dry in vacuo to obtain the intermediate ZIF-67.

[0025] (2) ZIF-67 / C 3 N 6 h 6 preparation of

[0026] Dry 1.0g ZIF-67 in a vacuum oven at 60°C for 12h, then add 1.0g C 3 N 6 h 6 , fully ground, mixed evenly, the obtained powder product is ZIF-67 / C 3 N 6 h 6 .

[0027] (3) Preparation of ZIF-67@CNTs-1

[0028] ZIF-67-C 3 N 6 h 6 The powder is calcined at 700°C for 2 hou...

Embodiment 2

[0034] Example 2 A preparation method of high-efficiency composite wave-absorbing material ZIF-67@CNTs-2

[0035] (1) Preparation of ZIF-67;

[0036] 0.6g PVP, 0.6g (CoNO 3 ) 2 ·6H 2 O, 60mL methanol ultrasonic stirring 10min is recorded as solution 1 (PVP: 0.01g / ml methanol; PVP: (CoNO 3 ) 2 ·6H 2 O=1:1); 3.0g DMI was dissolved in 150ml methanol (DMI: 0.02g / ml methanol), ultrasonically stirred for 10min and recorded as solution 2, 150ml solution 2 was added dropwise to solution 1, and after mechanical stirring for 8h, Stand at room temperature for 12 h, wash with ethanol / water solution, and dry in vacuo to obtain the intermediate ZIF-67.

[0037] (2) ZIF-67-C 3 N 6 h 6 preparation of

[0038] Dry 1.0g ZIF-67 in a vacuum oven at 60°C for 12h, then add 5.0g C 3 N 6 h 6 , fully ground, mixed evenly, the obtained powder product is ZIF-67 / C 3 N 6 h 6 .

[0039] (3) Preparation of ZIF-67-CNTs-2:

[0040] ZIF-67-C 3 N 6 h 6 The powder is calcined at 600°C for 4 ...

Embodiment 3

[0041] Example 3 A preparation method of high-efficiency composite wave-absorbing material ZIF-67@CNTs-3

[0042] (1) Preparation of ZIF-67;

[0043] 0.6g PVP, 1.5g (CoNO 3 ) 2 ·6H 2 O, 30mL methanol ultrasonic stirring 30min is recorded as solution 1 (PVP: 0.02g / ml methanol; PVP: (CoNO 3 ) 2 ·6H 2 O=1:4); 1.0g DMI was dissolved in 50ml methanol (DMI: 0.02g / ml methanol), ultrasonically stirred for 30min and recorded as solution 2, 50ml solution 2 was added dropwise to solution 1, and after mechanical stirring for 6h, Stand at room temperature for 24 h, wash with ethanol / water solution, and dry in vacuo to obtain the intermediate ZIF-67.

[0044] (2) ZIF-67-C 3 N 6 h 6 preparation of

[0045] Dry 1.0g ZIF-67 in a vacuum oven at 60°C for 12h, then add 3.0g C 3 N 6 h 6 , fully ground, mixed evenly, the obtained powder product is ZIF-67 / C 3 N 6 h 6 . .

[0046] (3) Preparation of ZIF-67-CNTs-3

[0047] ZIF-67-C 3 N 6 h 6 In a tube furnace, calcined at 900 °C fo...

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Abstract

The invention provides a preparation method of an efficient composite wave-absorbing material ZIF-67atCNTs and belongs to the technical field of composite materials. At first, ZIF-67 is synthesized, after the ZIF-67 is fully dried, a certain amount of melamine is added, and by means of grinding and uniform mixing, mixed powder is obtained. Then high-temperature carbonization treatment is carried out, Co in the ZIF-67 is reduced at a high temperature to further catalyze a carbon nao-tube growing on the surface of a dodecahedron skeleton, and a hedgehog-shaped cobalt carbon composite wave-absorbing material (ZIF-67atCNTs) is prepared. The ZIF-67atCNTs prepared through the two-step method has excellent wave-absorbing performance, and effectively absorbs an overall X wave band covered by the band width.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a high-efficiency composite wave-absorbing material ZIF-67@CNTs. Background technique [0002] With the development of information technology, various electronic devices are constantly being updated, and human beings are about to enter the 5G era. However, a large amount of electromagnetic radiation will be generated, which poses a serious threat to human physical and mental health. On the other hand, with the needs of modern information warfare, the requirements for high-speed aircraft electromagnetic wave absorption stealth technology are also increasing. New and efficient electromagnetic wave composite absorbing materials have become a hot research object in the field of national defense and military affairs, especially in the X-band (8-12GHz ) full coverage and efficient absorption of electromagnetic waves is still a very difficult problem. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/44B22F1/02C01B32/162C23C16/26
CPCC23C16/4418C23C16/26C01B32/162B22F1/16
Inventor 陈平朱晓宇邱红芳陈冠震闵卫星
Owner DALIAN UNIV OF TECH
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